Lease: Wellington KGS Well 1-32 ( 15-191-22591 ) ; operator: BEREXCO LLC; Field: Wellington 
Location: T31S R1W, Sec. 32 ; NE SW NE NE ; 955 South, 877 West, from NE corner 
Longitude: -97.4423481 ; Latitude: 37.3154639 
County: Sumner  
Total Depth: 3660 ; Elevation: 1259 GL 
2340; 2344; Sh, gy, drk gy, frm
2344; 2352; LS, tan-buff, f-crypto xln, hard, dns, few pcs of drk frs, chrt.
2352; 2362; LS, tan, fxln,scrt foss, scrtd vuggy por, ns
2362; 2374; Sh, grn, gy drk gy, grn, silty, pyritic, gy silty, scrtd foss
2374; 2380; LS, buff, fxln,hrd dns, with LS, wht-tan,fxln, chlky-sub chalky, dns
2380; 2394; Sh, grn, lt gn, gy, lt grn, soft, sticky, strngers of gy siltstone
2394; 2406; LS, tan, f-med xln, scrtd foss, sub chalky, hrd with LS, buff, fxln, hrd, dns
2406; Heebner Shale
2406; 2418; Sh, blk, carb, firm, pyritic
2418; 2422; LS, buff, f-med xln, foss, hrd, dns, ns
2422; 2434; SS, wht-clr, f grn, rndd-sub rndd, calc cement, tight, some clr ss with int xln, & vuggy poro, ns, sringers of Siltstone, gy, with LS, wht, fxln, soft, chalky
2434; 2450; LS, wht-tan,fxln,foss,pp & vuggy poro, ns, LS, wht, fxln, hrd, dns, styolite, stringers of pyrite
2450; 2462; Sh, grn, gy, grn, silty, pyritic
2462; 2466; LS, tan, fxln, hrd, sctrd vuggy poro, ns
2466; 2474; Sh, grn, gy, with Siltstone grn
2474; 2478; LS, buff, f-crypt xln, hrd, dns
2478; 2488; Sh, gy-drk gy, frm
2488; 2502; LS, wht-tan, f-med xln, v foss, partly oolit, intxln, omoldic and vuggy poro, ns
2502; 2520; Sh, gy, drk gy, sctrd red, some stringers of grn-gy siltstone
2520; 2540; Sh, gy, grn, and lt grn, intrbdd with Ls, tan, f-med xln, foss, pp & vuggy pror, ns
2540; 2558; Sh, gy, drk gy, frm, stringers of lt grn-clr, vf grn SS with calc cement, tight
2558; 2562; LS, tan-buff, fxln,foss, hrd, dns,some drk fresh, chrt
2562; 2580; Sh, drk gy, gy, intr bdd with some grn, siltstone
2580; 2590; Sh, grn, gy sctrd red, with clr-lt grn siltstone, pyritic
2590; 2610; Sh, gy, scrtd grn with some intrbdd siltstone
2610; 2650; Sh, gy, drk gy and scrtd grn and red, some pcs of blk sh, gy Sh, with thin lyrs of blk sh, pyritic, few pcs of LS, wht, f-med xln, foss, chalky, ns
2650; 2678; Sh, g, drk gy, AA, some lt grn siltstone
2680; Iatan Limestone
2678; 2684; LS, buff-brwn, f-med xln, foss, hrd, dns, ns
2684; 2686; sh
2686; 2688; LS, tan, fxln, hrd, dns with gy
2688; 2691; Sh
2691; Stalnaker Sandstone
2691; 2696; SS, wht, clr, lt grn, f grn, calc cement, tight
2696; 2704; Sh, grn gy, few pcs of blk, hrd, frm
2704; 2730; SS, wht-clr, f-med grain, sub rndd-ang, poorly srtd, int xln & vuggy poro, partl glauc, some with wht calc cement, tight, ns
2730; 2746; SS, wht-clr, f-med grn, ang-sub rndd, int xln and vuggy poro, Sh, grn, lt grn, soft
2746; 2750; LS, tan, fxln, hrd, dns, sctrd foss, ns
2750; 2778; SS, clr-lt grn, f grn, poorly srtd, tight, with some stringrs of gy sh, SS, clr, med grn, well srtd, sub rndd-ang, int xln & vugy poro, ns
2778; 2780; LS, wht, fxln, hrd, dns, sctrd foss, sub chalky
2780; 2808; SS, clr, med grn, rndd-sub rndd, well srtd, int xln poro, partly glauc, ns
2808; 2816; SS, clr-wht, f grn, prly srtd, with gy sh strngrs, tight
2816; 2824; SS, clr, med grn, rndd-sub rndd, well srtd, int xln poro, partly glauc, ns
2824; 2850; Sh, lt gy, silty, Siltstone, lt grn
2850; 2866; Sh, gy, pyritic
2866; 2868; LS, buff, f-med xln, hrd, dns
2868; 2920; Sh, gy, pyritic, partly silty
2920; 2930; Sh, gy, LS, tan, fxln, scrtd pp poro, ns
2930; 2950; Sh, gy, pyritic
2950; 3014; Sh, drk gy, gy, argl, pyritic, few pcs of grn and red Sh, Siltstone, lt gy-clr, stringrs of blk sh
3014; 3041; Sh, blk, carb
3041; Lansing KC
3041; 3054; LS< LS, tan, sucro-med xln, foss, pp & vuggy poro, ns, LS, wht, f xln, soft chalky
3054; 3070; LS, tan-buff, f xln, hrd, dns, scrtd foss, ns, pcs of drk fresh chrt
3070; 3090; LS, off wht-tan sucro-med xln, foss, partly oolit, vuggy and pp poro, partly chalky, ns
3090; 3098; LS, wht, f-crypto xln, hrd, dns, with fresh lt chrt
3098; 3110; LS, tan, mix xln, foss, vuggy, int xln and intra xln poro, ns
3110; 3120; LS, wht-tan, crypto xln, hrd, sctrd foss, sctrd vuggy poro, dns, ns
3120; 3136; LS, tan, off wht, sucro-f xln, foss, vuggy & pp poro, sub chalky - chalky, ns
3136; 3146; LS, tan-wht, f-crypto xln, hrd, dns, mostly fress, wht-lt tan chert
3146; 3152; LS, brwn-buff, sucro-f xln, foss, vuggy poro, ns
3152; 3160; LS, tan, f-crypto xln, hrd, dns
3160; 3168; LS, tan, sucro-f xln, pp & scrtd vuggy poro, ns
3168; Stark Shale
3168; 3172; Sh, gy, drk gy, pyritic
3172; 3186; LS, tan-buff, f-med xln, hrd, dns, sctrd vuggy poro, LS, wht-tan, fxln, sub chalky, ns
3186; 3196; LS, tan, f-med xln, foss, oolit, ( packstone ), tight, no visi poro, ns
3196; 3208; LS, tan-buff, f xln, hrd, dns, partly cherty, some fresh, lt, chrt
3208; 3212; Sh, blk, carb, pyritic
3212; 3216; SS, clr-wht, f grn, sub rndd-angular, prly srtd, calc cement, tight, ns
3216; 3226; LS, buff, f-med xln, scrtd foss, hrd, dns
3226; 3236; LS, tan, sucro, foss, pp poro, ns
3236; 3250; LS, tan, buff, f-med xln, scrtd foss, scrtd vuggy poro, hrd, dns, ns
3250; 3284; LS, buff, f-crypto xln, hrd, dns, few fractured, some stylolite, few pcs of wht chalky LS
3284; BKC
3284; 3290; Sh, grn, gy drk gy, mostly blk carb, pyritic
3290; 3292; LS, tan, f-med xln, hrd, dns
3292; 3302; Sh, gy, drk gy, pyritic
3302; 3304; LS, tan, med xln, hrd, dns
3304; 3312; Sh, blk, carb,pyritic
3312; 3326; LS, tan, f xln, scrtd foss, hrd, dns
3326; 3348; Sh, grn-lt grn, with lt grn siltstone
3348; 3350; LS, lt grn-lt tan, f-crypto xln, hrd, dns
3350; 3366; Sh, grn, gy, and some drk gy, grn, silty
3366; 3380; LS, tan,sucro-f xln, pp & scrtd vuggy poro, ns, LS, tan-lt grn, f-crypto xln, hrd, dns
3380; 3384; Sh, blk, carb, pyritic, sh, grn, gy, lt grn, silty
3384; 3392; LS, tan-buff, f-med xln, scrtd foss, sctrd vuggy poro, ns, LS, tan, f-crypto xln, hrd, dns
3392; 3404; Sh, gy, drk gy, pyritic, with gy-grn siltstone
3404; 3420; LS, buff-drk gy, f-crypto xln, hrd, dns
3420; 3440; LS, tan, sucro-med xln, foss, pp & scrtd vuggy poro, ns LS, buff, crypto-f xln hrd, dns, cherty
3440; 3450; Sh, gy, drk gy, blk
3450; Pawnee Limestone
3450; 3464; LS, tan sucro-f xln, foss, vuggy and pp poro, ns
3464; 3480; LS, tan-buff, f-crypto xln, hrd, dns, partly cherty, with fresh lt & crk chert
3480; 3490; Sh, blk, crb, gy & drk gy, pyritic some clr-lt grn siltstone
3490; FTSC
3490; 3504; LS, tan-buff, f-crypto xln, hrd, dns, LS, tan sucro-f xln, scrtd vuggy & pp poro, ns
3504; Cherokee
3504; 3508; Sh, blk, carb
3508; 3518; LS, buff, f-med xln, foss, oolit, ( packstone ) hrd, dns, no visi poro
3518; 3526; Sh, grn, gy, drk gy
3526; 3530; LS, buff, f-crypto xln, hrd, dns
3530.0; 3540.0; LS, tan sucro-med xln, foss, vuggy & pp poro, ns

3540; 3600; Core 1

LOWER FT. SCOTT LS.

3540; 3542.3; grayish black; N2; lime mudstone; very argillaceous; slight to moderately silty; scattered fine skeletal debris in wackestone fabric; considerably mottled; grayish black N2 and grayish orange 10YR7/4; bioturbated; gradational contact

CHEROKEE GROUP 
EXCELLO SHALE

3542.3; 3545.3; grayish black; N2; shale; calcareous; very firm; zones of bivalves and brachiopods; sharp contact
3545.3; 3554.7; grayish black; N2; firm; shale; varying amounts of calcareous material; cm-thick layers; calcareous layers are olive gray 5Y4/1; gradational contacts several cm-thick; contain horizontal lenticular bedding with darker shale at 3643.7-43.5, 3650.7; 3649.3-3649.5, 3647-3647.3; cm to several cm-thick skeletal ( crinoid, bivalves, brachiopods ) lags at 3650.7-3650.5, 3647.3-3647.5, 3646-3646.3; slightly water reactive but firm; sharp contact
3554.7; 3555;  grayish black; N2; lime wackestone; bioclastic; sharp contact
3555;  3563.1; greenish black; 5GY2/1; mottled with olive gray 5Y4/1; mudstone; blocky; soft; clotted; cm-size and smaller granular structures; sharp contact
3563.1; 3563.5; medium dark gray; N4; shale; with grayish orange 10YR7/4 lithoclasts and thin bed; carbonate is skeletal slightly sandy wackestone to packstone; sharp contact
3563.5; 3573; dark gray; N3; grades upward to dark greenish gray 5G4/1; shale; calcareous; bottom 6" is soft and water reactive; less water reactive up to 3571.5; moderately firm above 3571.5; sharp contact
3573; 3575.5; medium dark gray; N4; shale; very soft; flakey; bottom 4" water reactive; dusky red 5R3/4 and moderate yellowish brown 10YR5/4; 10% mottling; sharp contact
3575.5; 3580; greenish black; 5GY2/1; shale; soft; claystone; dusky red 5R3/4 mottles at bottom 6"; silty faintly laminated greenish black 5GY2/1 shale which grades upward to olive gray 5Y4/1; top 4" has dark 10YR6/6 mottles; sharp contact
3580; 3580.5; dark greenish gray; 5G4/1; skeletal wackestone; argillaceous; sharp contact
3580.5; 3582.9; grayish black; N2; shale; ranges to greenish black 5G2/1; soft to moderately firm; firming upwards; sharp contact
3582.9; 3585; olive gray; 5Y4/1; very argillaceous skeletal lime wackestone; firm; very sharp contact
3585; 3590; medium dark gray; N4; shale; very soft; flakey; top inch is dark grayish black N2 chert; sharp contact
3590; 3593.2; dusky yellow green; 5GY5/2; shale; limestone interclasts of skeletal wackestone to packstone; clasts are pinkish gray 5YR8/1; moderately soft ; intervals range from firm to soft water reactive; blocky mudstone; sharp contact
3593.2; 3595.2; olive gray; 5Y4/1; shale; light olive gray 5Y 6/1 lithoclasts of skeletal wackestone; moderately firm; sharp contact
3595.2; 3599.3; medium dark gray; N4; shale; soft; water reactive; sharp contact contact
3599.3; 3602; brownish gray 5YR4/1; shale; moderately firm; autoclastic breccia appearance; clasts varying from brownish gray 5YR4/1 to dusky red 5R3/4; more dominantly red above 3600; flecks of gleyed material at sharp contact; vertical mottling
3602; 3607.5; brownish gray 5YR4/1; grades up to medium dark gray N4; shale; indistinct bedding; moderately firm; water reactive; gradational contact
3607.5; 3610.1; olive black; 5Y2/1; olive gray 5Y4/1; mottled; grayish red purple 5RP4/2; sandstone; very fine silty; thin wispy wavy bedding; low angle cross stratification; wavy; mm-size beds; alternating colors; small scale ripple cross laminations; upper 6" has mottled brecciated and disrupted fabric;  upper 4" inches are light olive gray 5Y 6/1; gradational contact
3610.1; 3613.4; dark reddish brown 10R3/4; greenish gray 5GY 6/1; alternating bedding; shale; slightly firmer; more silt grading upwards towards silty shale; 50/50 uniformly bedded; heterolithic bedding with ripple laminations; (tidal); gradational contact
3613.4; 3618.9; dark reddish brown 10R3/4; greenish gray 5GY6/1; 50/50 variegated color; shale; variegated; blocky; silty mudstone; ped structures; gradational contact
3618.9; 3620.4; 5GY5/2; dusky yellow green; shale; blocky mudstone; water reactive; soft; gradational contact
3620.4; 3622.3; dusky red 10YR2/2; shale; soft; variegated; dusky red 10YR2/2 with dark yellowish orange 10YR6/6; blocky mudstone; distinct patches partially; clotted with dark yellowish orange 10YR6/6; gradational contact
3622.3; 3623; autoclastic breccia; lime mudstone; sharp contact
3623; 3624.8; 5GY5/2; dusky yellow green; shale; soft; grades to dark green 5GY4/1; sharp contact
3624.8; 3625.5; very pale orange; 10YR8/2; autoclastic lime mudstone breccia; 5GY5/2 dusky yellow green matrix between clasts; sharp contact
3625.5; 3627; grayish black; N2; shale; soft; sharp contact
3627; 3627.2; greenish gray 5GY6/1; shale; lime packstone; lithoclasts of the limestone below 3627.2-3627; sharp contact
3627.2; 3628.4; yellowish gray; 5Y8/1; lime packstone; interclastic skeletal packstone to grainstone; lithoclastic; 3628-3628.2 shale bed; sharp contact
3628.4; 3630.9; greenish gray 5GY6/1; shale; moderately firm; poorly bedded; sharp contact
3630.9; 3637.2; dark gray; N3; claystone; very soft; water reactive; occasional cm-size clasts of carbonate to 3636.5; grades up to a medium dark gray N4 soft shale at 3632.5; 3632.5-3630.9 is a moderately firm medium dark gray N4 shale mottled from brownish gray 5YR4/1 to greenish gray 5GY6/1;  gradational contact
3637.2; 3637.8; dusky yellow green; 5GY5/2; shale; basal clasts; cm-size clasts incorporated in green shale; gradational contact
3637.8; 3639.2; 5Y6/1; light olive gray; variegated; pale yellow orange 10YR 8/2; shale; bioturbated; mottled; subaerial surface; grades up to calcareous silty packstone; bioclasts; clasts from underlying unit; sharp contact
3639.2; 3645; 5GY4/1; dark greenish gray; claystone; very soft; blocky; variegated;  brownish gray 5YR4/1; gradational contact
3645; 3646.7; softer; N3; dark gray; claystone; gradational contact
3646.7; 3648.7; 5GY4/1; dark greenish gray; claystone; blocky; mottled; very dusky red 10R2/2; slight to non-calcareous; moderately firm; gradational contact
3648.7; 3650; 5GY6/1; claystone; greenish gray; blocky; variegated; gradational contact
3650; 3651; 5GY6/1; claystone; greenish gray; laminated; blocky; moderately firm; variegated; mottled; dark greenish gray 5YR4/1; gradational contact
3651; 3653.7; greenish gray 5GY 6/1; shale; very soft; blocky; gradational contact
3653.7; 3657.7; N2; grayish black; claystone; soft; fissile; water reactive; variegated; alternates with medium dark gray; N4; mottled; gradational contact

REWORKED MISSISSIPPIAN

3657.7; 3658.3; 10YR6/2; light brownish gray; chert conglomerate; siltstone matrix; isolated chert clasts; calcareous sharp contact

MISSISSIPPIAN 

3658.3; 3662.1; grayish yellow green; 5GY7/2; chert; massive; several-cm- sized brick like rectangular chert with corroded edges in matrix; peloidal crinoidal peloid packstone to grainstone; autoclastic breccia; chert is rimmed with 10YR 6/2; light brownish gray and grades out to N3 dark gray; matrix is mortar-like silt sized quartz and chert grains; 3660-3658.6 grades up from incipient to autoclastic breccia; sharp contact
3662.1; 3662.2; grayish yellow green; 5GY7/2; shale; thinly bedded with chert; opaque very pale orange 10YR8/2 chert; module of pelleted silicified wackestone to packstone; bioclasts within chert; sharp contact
3662.2; 3664.2; 10YR6/2; pale yellowish brown; siliceous autoclastic breccia; clasts of tripolite; nodules and lenses of porcelain gray-green chert in a matrix of tripolitic chert; oil stained; incipient autoclastic breccia; subvertical fractures common; tripolitic chert is incipient autoclastic breccia; matrix is a more broadly distributed tripolite in which autoclasts have formed; oil staining in tripolites; sharp contact
3664.2; 3665; 10YR6/2; pale yellowish brown; chert; multi-cm chert clasts infilled with grayish yellow green 5GY7/2 clay; chert clasts are corroded; transported chert; bed of grayish yellow green 5GY 7/2 shale 
3665; 3670.4; 10YR6/2; pale yellowish brown; chert; composed of cm-size clasts and fine breccia clasts all silicified together; scattered cavities subhorizontal lenses of grayish yellow green 5GY 7/2 shale; few fractures; clasts of oil stained tripolite giving a brown mottled appearance; shale laminae increase upwards; sharp contact
3670.4; 3691; 10YR6/2; pale yellowish brown; chert (tripolite); dolomitic; microporous brecciated chert clasts; gray nonporous porcelain chert clasts; angular infilled with tripolite; massive; fresh chert surrounded by interclast porosity; same chert seen in nodules below; interclast porosity; coarse breccia;  pore space/vugs in chert bands; (cave fill?); very porous and permeable; fractures; tripolite looks dissolved; preserving more porcelain chert; 3668-3667.4 is infilled between chert with grayish yellow green 5GY 7/2 clay; 3667.4-3667 is breccia with cm-size chert clasts partially silicified less connected porosity a brickwork with grayish yellow green 5GY 7/2 shale fill; sharp contact
3691; 3698.4; 10YR6/2; pale yellowish brown; dolomite; chert (tripolite); fine microporous alternating cm-size bedding with darker bands with increased gray banded chert; irregular complex bands; pore space/vugs in chert bands; fractures concentrated in the chert bands; lenticular dolomite has associated vuggy porosity; tripolite is uniformly porous and oil stained; discontinuous chert nodules; gradational contact
3698.4; 3709; 10YR6/2; pale yellowish brown; dolo siltite; microcrystallized chert tripolite; oil stained; microcrystalline porosity increasing upward;  massive; scattered vugs; pinpoint to sum-cm vugs; no body fossils or skeletal debris; no black chert or chert nodules; gradational contact

REGRESSION

3709; 3722.6; 5Y4/1; olive gray; lime mudstone; argillaceous; uniform; wispy shale laminations; indistinct cm-scale bedding; bioturbation; sub-cm mottling; 
3722.6; 3740.2; 5Y4/1; olive gray; lime mudstone; bioturbated; thinly bedded; laminated; mottled; few cm-thick beds of crinoidal packstone; intervals with scattered crinoids; wispy shale beds; rare chert; isolated bands of black chert of 3732.3 to 3732.4 and 3728.2-3728.7; gradational contact
3740.2; 3740.5; 5Y4/1; olive gray; lime packstone; crinoidal; with sharp contacts above and below

ABRUPT SHALLOWING

3740.5; 3795.3; 5Y4/1; olive gray; lime wackestone; nodular to laminated; abundant phycosiphon; dense; horizontal to subhorizontal bedding; wispy shale laminations scattered; scattered intervals with crinoids but crinoids are infrequent; argillaceous content is low; chert starts at scattered light gray chert nodules; areas with occasional black chert following bedding, replace matrix; increase of dark shale laminations and chert above 3791; mudstone cm beds lenticular beds of lime mud that are microlaminated and pencil-point burrows, phycosiphon; chert also crosscuts bedding; lighter beds substantially decrease after 3777; sharp contact

ABRUPT DEEPENING

3795.3; 3798; 5Y4/1; olive gray; packstone to grainstone; medium grained; crinoidal; broken fossil fragments; scattered mud clasts at bottom; scattered to abundant irregular chert nodules replacing dolomite; articulated brachiopods; crinoidal; sharp contact

DEEPENING

3798; 3805.5; 5Y4/1; olive gray; dolopackstone; peloidal; moderately argillaceous; silty; becomes cm-scale rhythmically bedded alternating light and dark; lighter layers are microlaminated ; increasing chert nodules above 3805; irregular nodules from cm to multi-cm in size; irregular cm-relief abrupt contact

ABRUPT FALL

3805.5; 3815; 5Y4/1; olive gray; dolo packstone; peloidal; moderately argillaceous; silty; mm laminated; alternating lighter and darker beds; pencil-point horizontal occasional elongated burrows, phycosiphon; dark shale beds alternating with olive gray beds; 

DEEPENING

3815; 3844; 5Y4/1; olive gray; dolo packstone; peloidal; moderately argillaceous; silty; laminated; abundant dark phycosiphon burrows; wavy bedding; 3848.7-3851 more abundant shale with lenses of cleaner dolomite and chert; scattered to increasingly abundant dolomite nodules cm-size increasing upward; milky translucent chert in filled vugs; cm laminae with phycosiphon scattered through the interval; gradational contact
3844; 3849; 5Y4/1; olive gray; packstone; peloidal; abundant coarse quartz nodules cm-size increasing upward; milky translucent chert in filled vugs;  moderately argillaceous; laminated; wavy bedding distinguished by shales; 3848.7-3851 more abundant shale with lenses of cleaner dolomite; scattered to increasingly gradational contact
3849; 3858; 5Y4/1; brown; dolo packstone; fine; peloidal; scattered to increasingly abundant silica nodules cm-size increasing upward; milky translucent chert in filled vugs;  moderately argillaceous; laminated; wavy bedding distinguished by shales; 3848.7-3851 more abundant shale with lenses of cleaner dolomite; gradational contact
3858; 3869; 5Y4/1; dark gray; dolo packstone; fined grained; moderately argillaceous; silty; laminated; few phycosiphon; wavy bedding distinguished by shales; 3848.7-3851 more abundant shale with lenses of cleaner dolomite; scattered to increasingly abundant silica nodules cm-size increasing upward distorting bedding; occasional phycosiphon; milky translucent chert in filled vugs;  occasional phycosiphon burrows; 3956.5 has increasing lamination with phycosiphon; gradational contact
3869; 3873; 5Y4/1; dark gray; dolo packstone; silty; peloidal; laminated; 20% silt; wispy silty laminations; thin wavy bedded; some discontinuities; packstone beds limited to subhorizontal lenses and vertical burrowing 3868.3-3869; finger sized discontinuous vertical burrowing filled with packstone; sharp contact

DEEPENING

3873; 3884.7; 10YR7/4; grayish orange; lime packstone; silty peloidal; rods, elongated grains, silica with calcite cement and discontinuous horizontal bedding; scattered gray silty wisps; scattered cm silica replacement nodules; scattered cm-thick beds of medium peloidal (skeletal? Spiculitic?) packstone to grainstone at 3882.5-3882.5, 3880.3-3880.4, 3879.3-3879.4, 3871.4-3871.5 with sharp contacts; gradational contact at top; microporosity soaks up water; fining upward to top; cm-sized irregular subvertical burrows; sharp contact
3884.7; 3891; 5Y4/1; dark gray; lime packstone; slightly argillaceous; lighter and more laminated; very fine interparticle porosity; compaction around chert nodules; occasional horizontal pencil-sized burrow; occasional discontinuity surface; chert nodules and chert replacement; occasional dark shale laminae sub-mm-size; finely wispy laminated mm to cm bedded; INTERBEDDED with  5Y 4/1; dark gray; medium grained peloidal (skeletal? spiculitic?) packstone; silty; sharp contact; at 3986.1-3886.2, 3885.8-3885.9, 3885.5-3885.1, 3884.7-3884.4.
3891; 3891.4; 5Y5/1; gray; peloidal dolo packstone; medium sized peloids (skeletal?); rounded peloids; poorly sorted; thin laminations of shale; abrupt change to calcite above and dolomite below; darker below; low angle sharp contact (erosional?)
3891.4; 3905.8; 5Y4/1; olive gray; dolo siltite; laminated mm-scale; scattered nodular bedding; occasional cm-size nodules of dolomite; pinpoint porosity lining laminae; interparticle porosity; increasing amounts of coarse crystalline; cm-size nodules are anhedral dolomite filled with clear translucent bluish chert; cm-sized nodules replacive chert preserved textures; very sharp contact
3905.8; 3906; N4; medium dark gray; dolo packstone; silty; peloidal; medium grained; intercrystalline porosity; few silica sub-cm; cm-bedded; sharp contact
3906; 3907; 5Y4/1; olive gray; siltstone; distinct lenticular bedding; scattered coarse dolomite nodules; sharp contact
3907; 3907.8; olive gray  5Y4/1; dolo packstone; silty; medium grained peloidal; laminated with bioclastic?; medium peloidal silty packstone; intercrystalline microporous; sharp contact 
3907.8; 3908.3; laminated silty w/skeletal packstone, silicified elongated rods - spicules; lenses of silica replacement
3908.3; 3911.6; lighter; siltstone; dolomitic; heavily bioturbated; porous with sharp upper contact

REGRESSION

3911.6; 3913.9; 5Y4/1; olive gray; siltstone; argillaceous; dolomitic; distinct lenticular bedding; alternating olive gray; 5Y4/1 and medium dark gray; wispy shale laminations; few vague dolomitic silt lenses; sharp contact
3913.9; 3914.2; N2; grayish black; shale; 30% shale in thin mm-size beds; gradational contact
3914.2; 3920.6; olive gray; 5Y4/1;  siltstone; argillaceous; dolomitic; distinct lenticular bedding; alternating olive gray  5Y4/1 and medium dark gray; wispy shale laminations; dolomitic siliceous nodules; gradational contact
3920.6; 3920.8; N2; grayish black; shale; 30% shale in thin mm-size beds; gradational contact
3920.8; 3926; 5Y4/1; olive gray;  siltstone; argillaceous; dolomitic; distinct lenticular bedding; alternating olive gray  5Y4/1 and medium dark gray; wispy shale laminations; dolomitic silt lenses and pink calcite nodules; 3922  bryozoa and dark black flecks;  gradational contact
3926; 3927; N2; grayish black; shale; 30% shale in thin mm-size beds; finely bioturbated; abrupt contact

DEEPENING (MAXIMUM FLOODING SUFACE)

3927; 3932.2; olive gray;  5Y4/1;  siltstone; argillaceous; dolomitic; Finely bioturbated (shallowing); 50% silt; wispy shale laminations; indistinct bedding; faint discontinuous laminations; abrupt contact
3932.2; 3936.7; lighter; siltstone; argillaceous; dolomitic; phycosiphon lithofacies, shallowing; 50% silt; wispy shale laminations; indistinct bedding; faint discontinuous laminations; gradational contact
3936.7; 3942.2; siltstone; darker more uniform argillaceous with burrows; sharp top; 3936.7-3932.2; phycosiphon lithofacies; lighter shallowing; from 3942-3941; gradational contact

DEEPENING

3942.2; 3946; siltstone; more frequent black shale laminations; dolomite replacement crystal at 3940; 3942.4 boundary darker beds and lenticular beds above
3939; 3975.6; N4; medium dark gray; siltstone; dolomitic; very argillaceous; faintly laminated irregular; 30% silt; 3972-3973 cm-sized irregular calcareous nodules/coarse dolomite with partial silica replacement; 56.2 more lenticular beds upward, faint lenticular bedding alternating olive gray  5Y 4/1 and medium dark gray; increasing quartz silt and dolomite mud as you go up the unit; scattered black shale seams; wispy laminations; indistinctly bedded; bioturbated cm lenses with millimeter smaller burrows ( phycosiphon ?);  
3975.6; 3993; 5GY3/1; very dark greenish gray; shale; tight; dolomitic; around 20% silt; scattered black shale laminae; uniform; (potential caprock); scattered pyrite; 3981.3 starts increasing silt and cm thick nodular beds;  3982, 3979  shallowing; gradational contact
3993;  4014; 5Y2/1; olive black; shale; dolomitic; tight; around 10% silt; uniform; alternating millimeter to cm laminations; 4010.2-4000.3 more silt , claystone; (potential caprock); tight, 4001.00 pico to nanodarcy permeability, gradational contact

DEEPENING

4014; 4027.5; 10Y3/1; very dark greenish gray; shale; silty; dolomitic; tight; uniform; 10% silt; rare silica nodules; wavy to horizontal bedded; indistinct bedding; bedding with mm-scale laminations; some alternating light and dark lenticular bedding with more bioturbation in lighter intervals; several crinoids; gradational contact
4027.5; 4029;  dolomitic siltstone, much greater bioturbation, occasional siliceous nodules, top with phosphatized lithoclasts with packstone of skeletal debris 

TRANSGRESSION

4029; 4041; 5Y4/1; olive gray; dark; siltstone; faintly laminated irregular; scattered phycosiphon burrows and nodules, lenses of silty dolomite with partial silicification; lenses have sub-cm vugs; scattered sub-cm scale fractures; gradational contact with fewer light colored nodules
4041; 4047; 5Y4/1; olive gray; siltstone; irregular lenses of porous dolomite, intercrystalline silica forming nodules; matrix 5GY 2/1 greenish black silty dolomite; mottled; lenticular dolomite; micritic; silty; vertical discontinuous fractures and vugs in nodules; scattered fine fractures; micro-pinpoint porosity that soaks up water around the silt; poor porosity; gradational contact
4047; 4048.3;  5Y4/1;  olive gray; silty dolomitic, few chert nodules, silty shale; overlain by gray lenticular silty shale with skeletal debris and spicules, sharp contact

REGRESSION

4048.3; 4050.5; 5Y4/1; olive gray; nodular; siltstone; dolomitic in a mudstone; discontinuous lenses; wispy dark shale laminations; mottled; gradational contact
4050.5; 4059.6; 5Y4/1;  olive gray; shale; silty; lenticular silt beds; increasing amount of black wispy shale 4052.5 to 4050.5; gradational contact 
4059.6; 4059.7; 5Y2/1; olive black; shale; sharp contact 
4059.7; 4059.8; 5Y6/1; light olive gray; siltstone; sharp contact 
4059.8; 4065; 5Y4/1; dark olive gray; shale; with quartz silt; dolomitic; slightly water reactive; indistinct subhorizontal bedding; occasional crinoid; sharp contact
4065; 4065.4; lithoclasts, phosphates, irregular contact below lithoclasts, cm relief

NORTHVIEW SHALE

4065.3; 4065.9; N2; grayish black; shale; uniform; massive; at 4065.5 becomes sandy shale with sand size black flecks (erosion surface?); sharp contact

Transgression
SUBAERIAL EXPOSURE (BASE KASKASKIA CRATONIC SEQUENCE)

SIMPSON
4065.9; 4099.6; 5Y8/1; yellowish gray; sandstone; fine-grained quartz; calcareous; porosity is good 4098 to 4099.6; bioturbated; some shale laminations but dominantly sand; coarser towards the top; common chert (quartzite) beds above 4084 with carbonate cement; patches of porosity; mottled; hydrocarbon odor; patchy hydrocarbon staining; 4069 to 4065.9 clean 10YR 8/2 very pale orange sand with faint low-angle crossbedding; sharp contact
4099.6; 4100.3; N5; medium gray; shale; claystone; massive; sharp contact
4100.3; 4106.3; 5Y8/1; yellowish gray; sandstone; lithoclasts; 4104 to 4102.3 is 60% cm-size lithoclasts of sand in matrix of dark clasts and sand; black matrix of sand and dark clasts; sharp contact
4106.3; 4109.3; N5; medium gray; shale; claystone; massive; sharp contact
4109.3; 4112.7; 5Y8/1; yellowish gray; basal lag of cm-size sand with dark lithoclasts; thin beds of mottled shale;  interclastic interval; bioturbated; sandy shale; sharp contact
4112.7; 4117.7; N5; medium gray; shale; waxy; claystone; sharp contact
4117.7; 4123.5; 5Y8/1; yellowish gray; heavily bioturbated; sandstone; pencil size vertical and horizontal burrows; cm-size circular burrows; sharp contact
4123.5; 4128.8; N4; medium dark gray; massive; sand; oil stained; not vuggy; interparticle porosity; calcareous; hard; dissolution of cement; subhorizontal bedding with faint bioturbation; sharp contact
4128.8; 4131.3; 5Y8/1; yellowish gray; heavily bioturbated; sandstone; fine-grained quartz; ranges 60% sand; burrows; some vertical pencil sized burrows; sharp contact
4131.3; 4135.7; N5; medium gray; shale; intervals of silt; faint evidence of bioturbated; some sandier beds; sharp contact
4135.7; 4136.1; 5Y8/1; yellowish gray; heavily bioturbated; sandstone; fine-grained quartz; ranges from 50%/50% up to 60% sand; sharp contact
4136.1; 4136.5; N4; medium dark gray; shale; flakes; claystone; sharp contact
4136.5; 4142.4; 5Y8/1; yellowish gray; heavily bioturbated; sandstone; fine-grained quartz; ranges from 50%/50% up to 60% sand; sharp contact
4142.4; 4143.5; 10BG3/1; very dark greenish gray; shale; waxy; claystone; transitional contact
4143.5; 4144.1; 5Y8/1; yellowish gray; interbedded shale and sandstone; laminated sand and shale; heterolithic; mm-thick shale laminae; 50% sand and 50% shales; cm beds with mm laminations; sharp contact
4144.1; 4144.4; 5B 5/1; medium bluish gray; shale; claystone; sharp boundary
4144.4; 4151.8; 5Y8/1; yellowish gray; sandstone; fine to medium grained quartz sand; cm-bedded wavy bedded; thinly laminated; mm shale laminae; numerous reactivation surfaces; common ripple cross stratification; above 46 becomes increasingly shaly with alternating thin mm-thick shale and sand; some vertical pencil sized burrows; sharp contact
4151.8; 4153.3; 5Y8/1; yellowish gray; sandstone; medium grained; 60% sand; heterolithic; well sorted; heavily bioturbated; cm rounded burrows; pencil type burrows; thin shale 5B5/1; medium bluish gray at 4152-4151.8; sharp contact
4153.3; 4154; 5B5/1; medium bluish gray; shale; claystone;  sharp boundary
4154; 4154.3; 5Y8/1; yellowish gray ; sandstone lag; filled with basal sandy 0 .2" sand with brown lithoclasts ( darkened to phosphate ?); sharp contact
4154.3; 4157; 5Y8/1; yellowish gray; sandstone; medium grained; well sorted; ranging from bioturbated at base to 4155.7, 20% shale (5B5/1; medium bluish gray); 4155.7 to 4154 is mainly sandstone; irregular mulitple cm-relief; sharp boundary
4157; 4158.1; 5B5/1; medium bluish gray; shale; 20% sand; heterolithic; bioturbated; sharp boundary
4158.1; 4161.8; 5B5/1; medium bluish gray; claystone;  intermixed with multi-cm thick sands; horizontal bedded; sand is mm-bedded; 4158.1 to 4159 is 40% sand and 60% shale (5B5/1; medium bluish gray) heavily heterolithic bioturbated; distinct beds of sand up to 4157.1; 4158.1 has a sharp surface overlain by a couple inches of sand with darkened lithoclasts; sharp contact
4161.8; 4165.8; 5Y8/1; yellowish gray; sandstone; fine grain quartz; rounded; frosted grains; 30% silt to shale; interbedded with 5GY5/2; dusky yellow green; heterolithic; heavily bioturbated; burrows are cm size; irregular mm size traces; occasional cm-size beds of sand subhorizontal; horizontal laminations; microlaminations in the thin preserved beds of sand; abrupt contact


ARBUCKLE
4165.8; 4179.3; 5YR4/1; brownish gray; dolo mudstone; mottled dark clasts in lighter dolo grainstone and peloidal matrix; 4177.7 medium bluish gray 5B 5/1 claystone layer; lenses of sheet cracks filled with quart silt; 4174.6 to 4173.4 olive colored mixed with clasts and grades into a brown dolomudstone with floating darkened micritic clasts and darker brown angular clasts (cave fill, collapsed breccia); quartz sand; frosted quartz grains; brown dolomudstone goes to the top of the Arbuckle at 4165.8; unit with clasts from incipient autoclastic brecciation at 4169 to 4173; sharp irregular contact
4179.3; 4209; 5YR4/1; brownish gray; peloidal dolo grainstone and dolo packstone; medium to coarse; some bioturbation; poorly bedded in lower portion of unit; pinpoint vugs; locally tight when more argillaceous 4199; 4195 has a autoclastic incipient brecciation; around 4193 cm to several cm sets of fining upward dolopackstone to dolograinstone; 4193 argillaceous 1/4" thick bed;  4194 occasional cm vugs and around clasts; thinly bedded medium peloidal dolograinstone and dolopackstone; with medium bluish gray 5B 5/1 claystone @4179.3; another shale seam at 4190.2; incipient autoclastic breccia at 4190.5; N8; very light gray uniform dolomudstone at 4190; dolomicrite at 4189; 4187 oolitic dolograinstone with oomoldic porosity and vuggy irregular fine pinpoint vugs; another mud layers 4185.7 to 4185.8 with incipient autoclastic brecciation in the lower part of the oolite 4185 to 4187; another shale at 4187; another shale seam at 4183.2; fine peloidal wackestone from 4183.2 to 4180.8; 4180.8 to 4179.3 medium to coarse grained peloidal grainstone and packstone with highly disturbed bedding with large clasts and high angle contacts with lots of debris with scattered pinpoing to cm-scale and larger vugs; sharp angular contact; upper contact of shale is irregular and has broken clasts
4209; 4223; 5YR4/1; brownish gray; peloidal dolo grainstone and dolo packstone; medium; varying beds; argillaceous; interparticle porosity; moderate porosity; pinpoint vugs; sharp contact over basal lithoclastic lag with darkened grains with some silicification; tight argillaceous zone around 4213.2
4223; 4224; N8; very light gray; dolo wackestone; very fine; argillaceous bundle of silty beds and medium bluish gray 5B 5/1 claystone at 4223.3; sharp contact

Transgressive
Subaerial exposure

4224; 4238.3; 5YR4/1; brownish gray; peloidal dolo grainstone and dolopackstone; medium varying beds; more argillaceous; tight; pinpoint vugs; interparticle porosity; enhanced interparticle cm-size subparallel to bedding; some sub-cm size vugs scattered throghout;4232.5 to 4233 has couplets with vugs developed along boundaries with vugs filled with white chalky substance cementing around peloids (maybe anhydrite?); (tidal); 4224-4226 is partially silicified and incipient autoclastic brecciation of the grainstone packstone; sharp contact
4238.3; 4239.4; 5YR4/1; brownish gray; sharp contact peloidal dolo grainstone; medium; alternating; poorly sorted wackestone; gradational contact
4239.4; 4244.5; 5Y6/1; light olive gray ; peloidal dolo grainstone; medium alternating with muddier intervals at cm-scale (bundles);  horizontal beds; intervals with fist size vugs lined with dolomite; solution vugs along bedding planes; discontinuities between beds; finer grained intervals with mud are tight; sharp contact with bluish green shale interbedded with tight argillaceous peloidal mudstone
4244.5; 4245.5; 5Y6/1; light olive gray; dolo mudstone; argillaceous; bands of medium grained pellet packstone; sharp contact
4245.5; 4248.2; 5YR4/1; brownish gray; medium-grained peloidal dolo grainstone to packstone; disrupted autoclastic brecciation; clasts are subhorizontal cm-thick bundles; loose grains supporting interstiticies; porous; interparticle porosity and pinpoint vugs mm to cm-size; small discontinuous solution enhanced vertical fractures; good porosity; sharp contact
4248.2; 4250; 5YR4/1; brownish gray; peloidal dolo packstone; medium-size;  poorly sorted; argillaceous; with medium bluish gray 5B 5/1 claystone with slickensides; autoclastic brecciation at top 5" with some solution enhancement around clasts with silty matrix; sharp contact
4250; 4258.6; 5YR4/1; brownish gray; peloidal dolo packstone; medium to coarse; argillaceous; cm-size beds; variable grain sizes; small scale pinpoint vugs; scattered vugs; occasional (@4252.8) larger cavities cm-size with baroque dolomite lining cavities; scattered partial fractures; oblique 4253 fracture; upper few inches has silification and coarser grained going through autoclastic incipient brecciation has solution enhancement; sharp contact
4258.6; 4262.2; 5Y6/1; light olive gray; peloidal dolo mudstone; argillaceous; silt-size peloids; 4259.2 to 4259.5 medium bluish gray 5B 5/1 claystone with slickensides; sharp contact
4262.2; 4269.2; 5Y6/1; light olive gray; peloidal dolo grainstone to dolo packstone; medium to coarse; occasional vug; low angle cross stratification; autoclastic brecciation; mottled 5B5/1 medium bluish gray chert silicification of oomoldic peloidal dolograinstone some areas are more dolomitic; blotchy silicification;  enhanced solutino around clasts; small discontinuous solution enhanced vertical fractures; 4269.5 there is a sharp boundary with nearly vertical relief highly irregular contact with decreasing ooids upward; sharp contact (photo)
4269.3; 4270.5; 5Y6/1; light olive gray; dolo mudstone; silt-size peloidal, packstone, 

Transgressive
Subaerial exposure

4270.5; 4275.9; 5Y6/1; light olive gray; peloidal dolo packstone to grainstone; fine to medium grained; disrupted bedding; autoclastic incipient brecciation; dense; scattered cm-size irregular vugs; discontinuous vertical fractures mostly confined to bedding but some cross cutting; solution enhancement along fractures; coarse dolomite lining fractures and vugs; sharp boundary
4275.9; 4277.8; 5Y6/1; light olive gray; peloidal dolo packstone; medium-grained; crossbedded coarse packstone with large cm-size lithoclasts; vugs; angular bedding; moderately porous; 6"-thick bed of N7 light gray uniform color dolomudstone/dolomicrite  4275.6 to 4275.9 
4277.8; 4281; 5YR4/1; brownish gray; pelleted dolo packstone to grainstone; medium-grained pinpoint molds and enhanced intercrystalline porosity; vuggy; mm to cm-size vugs; fair porosity; uniform; sharp contact 

4281; 4294; NO RECOVERY (DST 4 conducted 4280-4390 interval)

4281.0; 4294.0; Dolo, lt brown, fxln, oolitic, vuggy and oomoldic poro, ns

4294; 4295.7; 5YR4/1; brownish gray; pelleted dolo packstone to grainstone; pinpoint molds and enhanced intercrystalline porosity; fair porosity; sharp contact
4295.7; 4308.2; 5YR4/1; brownish gray; medium to coarse grain dolo peloidal packstone and grainstone; intervals of oomoldic porosity; fair porosity; bioturbated; mottled texture; 4307-438.2 has vuggy porosity from solution vugs with sub-cm size that may be conductive; fining upward to the top; occasional reactivation surface; sharp contact
4308.2; 4312; 5YR 4/1; brownish gray; dolo mudstone; argillaceous; silty; mottled; bioturbated; some laminations; wispy shale; gradational with dolomite; good aquitard-ish; no porosity; sharp contact
4312; 4315.3; 5YR4/1; brownish gray; dolo packstone and dolomitic mudstone; fine to medium grained; scattered argillaceous seams; bioturbation cm-size circular burrows; moldic grains or oomolds ?; porosity is poor; sharp contact
4315.3; 4330.3; 5YR4/1; brownish gray; fine to coarse poorly sorted dolo peloidal packstone; scattered argillaceous seams; some muddier intervals with higher dispersed clay; poor porosity; few scattered molds; some wavy bedding to wispy laminated beds of shale cm-thick; occasional discontinuity; more argillaceous as you go up; fining upward succession; sharp contact
4330.3; 4334; 5Y6/1; light olive gray; dolo packstone to grainstone; medium grained; reactivation surfaces abundant; low-angle bedding to indistinct bedding; cm-beds alternating with muddier to more grainstone facies including crinoids; upper portion has oolite molds; interparticle permeability; fair porosity; sharp contact
4334; 4362.2; 5Y6/1; light olive gray; dolo packstone; mm-size laminations; shale wisps; small bioturbation with rounded horizontal burrow traces; bioturbation scattered between 4351.6-4355.6 basically no porosity; could be aquitard; no fractures seen; increasingly argillaceous from 4348 to 4334 5Y 5YR 4/1; brownish gray; discontinuity surfaces with shaly dolomite cm's-thick; sharp irregular contact
4362.2; 4365.5; 5Y6/1; light olive gray; argillaceous laminated; tight; soft sediment deformation at 4364.5 of dolomite into more argillaceous material 4365-4363.7 is more argillaceous gray and brown; sub-cm laminations of dolomite and clay drapes; argillaceous silt sized dolomite up to upper contact; 4363.7-4362.2 is a fine to medium dolopackstone to grainstone with muddy birdseye with pinpoint interparticle porosity and small mm-size vugs; sharp contact

transgressive

4365.5; 4367.2; 5Y6/1; light olive gray; dolo packstone; coarse; crinoid? coated grain; wavy bedded with mud chip conglomerate at base from reworking of bottom lithology; occasional darkened lithoclast within the grainstone; pinpoint interparticle porosity abundant; coated grains; small vug sub-cm to cm-scale; no fractures; good porosity; sharp boundary
4367.2; 4374.8; 5Y6/1; light olive gray; faintly mm-laminated silt quartz 80% dolo mudstone 10% thin mm-scale shale drapes; grades up to more argillaceous 4370.5, scattered reactivation surfaces 4371.4 above 70.5 grades to a buff fine silty dolomite; sharp contact
4374.8; 4376.8; 5Y6/1; light olive gray; faintly cm-laminated fine-grained dolomitic packstone; clay laminae; irregular laminations with shale concentrations as birdseye;  tight; clay filled vugs but may still have porosity; sharp contact
4376.8; 4377.8; 5YR4/1; brownish gray; muddy pelleted dolo packstone; common broken fossil debris?; shale seam at cm-thick at top; sharp contact
4377.8; 4380; 5YR 4/1; brownish gray; medium pelleted dolo packstone; coarse grainstone ; vugs; indistinct bedding; very porous; matrix porosity; scattered bioclasts; crinoids; sharp contact
4380; 4381.5; 5Y6/1; light olive gray dolo packstone; fine grained; argillaceous; finely laminated; dense; 4380 flat truncation surface; sharp contact
4381.5; 4392.3; 5Y6/1; light olive gray; medium grained sandy dolo packstone; tight; low-angle cross stratification; lenticular wavy bedding; medium laminations of packstone and grainstone with shale clay drapes; clay varies from clay rick gradational to clay top; occasional discontinuities 4383 with skeletal lag with crinoid and bivalve; skeletal lag  reactivation surface at 4388.9 and 86.8 in darker shale;  4388.1 stromatolitic 1" wide on a reactivation surface and below has 6" of autoclastic breccia with sharp angular clasts infilled with coarse dolomite cement (the cement has vugs); sharp contact
4392.3; 4393.9; 5Y6/1; light olive gray; dolo mudstone; argillaceous; distinct even sub-cm laminations slightly irregular; occasional vertical and horizontal burrows;  reactivation at 4393 about 3 inches vertical relief and has a very scoured boundary; no vugs; tight; clasts of angular lithoclasts or grainstone and packstone; edges of lithoclasts are darkened borings; sharp boundary
4393.9; 4394.1; N2; grayish black; claystone; sharp boundary

Transgressive
Subaerial exposure

4394.1; 4395.7; 5B5/1; medium bluish gray; reworked autoclastic breccia; argillaceous mix with grain and packstone; clasts have rims of alteration or discoloration; infill greenish gray silty micritic dolomite contains crinoids, bryozoa; flooding surface and part of transgression followed by deepening; sharp contact
4395.7; 4431.6; 5YR4/1; brownish gray; peloidal dolo packstone; cross stratified laminations highlighted by thin clay layers (macrotidal); steeply dipping bedding ~45 degrees at 4431 to 4428.7; grades rapidly up to a medium grained peloidal dolopackstone; increased shale as you go up; mud drape and cm lenses of grainstone; 4404 to 4395.7 is even coarser with reactivation surfaces and mud drapes; lithoclasts present and are darkened at 4396 and 4396 and 4398; sharp boundary
4431.6; 4432; N4 medium dark gray; shale; dolo mudstone lenses; sharp contact
4432; 4442.5; 5YR4/1; brownish gray; dolo mudstone; interbedded argillaceous; no substantial porosity; becomes cleaner upward; tight; sharp boundary

Transgressive
Subaerial exposure

4442.5; 4460.5; 5Y6/1; light olive gray; peloidal medium sized dolo packstone; no bedding; some pinpoint vugs but no apparent fractures; grades up to a cross-bedded grainstone with reactivation surfaces; argillaceous seams and laminations; pinpoint porosity in molds and interparticle porosity; moderate to fair porosity; around 4445.2 has larger vugs and large vertical fracture and incipient brecciation; sharp boundary
4460.5; 4463.2; 5Y6/1; light olive gray; peloidal sandy dolo packstone; argillaceous; no bedding; some occasional bedding and lenses in patches; surface with clasts at 4461 with sharp irregular boundary with dark rounded clasts
4463.2; 4470.3; 5YR4/1; brownish gray; dolo mudstone; argillaceous; dense; no bedding; gray black chert associated; scattered vugs; 5N grayish black mud at 4466; sharp contact
4470.3; 4473.3; 5YR4/1; brownish gray; incipient autoclastic dolomitic breccia; peloidal  dolo packstone to dolo mudstone; scattered larger vugs and small discontinuous fractures; less matrix porosity; moderate porosity; sharp boundary
4473.3; 4479.4; 5YR4/1; brownish gray; silty to medium crystalline dolomite or dolomitized grains that look crystalline; good matrix porosity; moderate pinpoint vugs; good porosity (flow unit!); small discontinuous fractures ~1" dissolution enhanced; alternating laminated bedding up to nondescript bedding; uniform composition; dolomite; disrupted bedding; incipient brecciation; occasional pinpoint vugs; molds; interpartical vugs; small discontinuous fractures scattered abundant small and dissolution enhanced; sharp contact
4479.4; 4480; 5N grayish black shale; laminated lenses; small white flecks; sharp contact
4480; 4488; 5Y6/1; light olive gray; dolo mudstone; argillaceous; dense; few vugs; two directions of fracture with cement; sharp contact

Transgressive
Subaerial exposure

4488; 4493.2; 5YR 4/1; brownish gray; disrupted bedding and autoclastic breccia; dolo mudstone; black 5N grayish black chert; small scattered pinpoing vugs; long open fractures with dolospar lining;  greatly diminishing porosity and vugs; sharp contact
4493.2; 4507; 5YR4/1; brownish gray; dolo mudstone; matrix porosity; abundant pinpoint vugs; occasional fissures and partial small discontinuous vertical fractures dissolution enhanced, vuggy from 4504 to 4502; large natural fracture at 4500 to 4497, poor to moderate porosity; sharp boundary
4507; 4509; 5Y6/1; light olive gray; dolo mudstone; argillaceous; tight; mottled; disrupted bedding; irregular surfaces; scattered vugs; poor porosity; sharp boundary
4509; 4514; 5Y6/1; light olive gray; dolo mudstone; argillaceous; tight; laminated; no vugs or apparent fractures; some faint argillaceous bands anastomozing; beautiful mud; solution voids rounded dark gray chert cm-size at 4510 to 4511, and at 4511.5 reactivation surface with disruption feature overlain with rounded clast of dolomite mud and darker argillaceous dolomite; sharp boundary with desiccation feature?  
4514; 4521; N2 2; grayish black; dolo mudstone; argillaceous; tidal bundles; tight; varved continuous to lenticular with some disrupted and offset clay laminae (stromatolitic); no vugs or apparent fractures; wavy stromatolite;  discontinuity surface covered by 5708 with gray black shale bed cm-thick grades into a silty dolomite and wavy to laminated bedding and intervals of bioturbation up to laminated; more bioturbated as you go up the section; 4514-4515 is an incipient brecciations with indistinct clasts;  sharp boundary
4521; 4522; 5B5/1; medium bluish gray; dolo mudstone; autoclastic breccia with vugs; very irregular cm-size angular to rounded and mixed clasts of dolomite from light brown to gray; moderate porosity; sharp contact
4521; 4528; 5Y6/1; light olive gray; dolo mudstone; argillaceous; tight; wavy and wispy clay laminae; occasional vugs; no apparent fractures;  
4528; 4529; 5B5/1; medium bluish gray; massive chert; fractures; few scattered vugs; low porosity; grades to dolomite clasts mixed with chert and porosity along boundaries between clasts; gradational contact
4529; 4530; 5Y6/1; light olive gray; dolo mudstone; argillaceous; tight; wavy and wispy clay laminae; no vugs; few tight vertical fractures; sharp contact 
4530; 4530.2;  N2 2; grayish black shale; claystone; no vugs or fractures; a several-centimeter-size coated grain and oolitic clast embedded in shale; sharp contact

Transgressive

4530.2; 4532; 5Y6/1; light olive gray; peloidal dolo packstone; silt to very fine; cm-thick planar cross stratification at 30 degree; tight cemented; no porosity; no vugs; no fractures; sharp contact parallel to cross-stratification
4532; 4542; 5Y6/1; light olive gray; dolo mudstone; argillaceous; tight; wavy and wispy clay laminae; nodular scattered lenticular chert cm-sized at 4541; truncation surface at 4540; sharp contact 
4542; 4564; 5YR4/1; brownish gray; dolo mudstone; dense; slightly argillaceous; tight matrix with discontinuous vertical fractures; several splayed fractures up to 6 inches; scattered 1-cm vugs; no clasts; 4543.2 to 4542 is autoclastic breccia with vugs; very sharp boundary
4564; 4565; 5YR4/1; brownish gray; dolo mudstone; brecciated; discontinuous vertical fracture; scattered vugs; solution enhancement along brecciated boundaries; fair to poor porosity; sharp contact
4565; 4566.2; 5YR4/1; brownish gray; dense; dolo mudstone; argillaceous; tight; no vugs; no clasts; sharp boundary
4566.2; 4575.8; 10YR6/2; pale yellowish brown; dolo mudstone;  large cm's-big vugs/cavities lined; autoclastic breccia; tight to moderate porosity; gets more clay towards the bottom; interbedded with argillaceous dolomite and clean light brown breccia; clast have halos of color change; discontinuous fractures and dissolution enhanced vugs around clasts; moderate porosity; sharp contact
4575.8; 4579; 5Y6/1; light olive gray; dolo mudstone; argillaceous; tight; very few occasional vugs; massive; mottling along wavy disruptive bedding; solution cavity filled with dark gray argillaceous dolomite and clasts of micritic host rock; sharp contact
4579; 4585; 5Y6/1; light olive gray; dolo mudstone; argillaceous; tight; very few occasional vugs; massive; mottling along wavy disruptive bedding; abundant small incipient brecciation and disrupted bedding with <1cm clasts  at 4579, tidal flat; sharp contact

transgressive
Subaerial Exposure

4585; 4588.2; 10YR6/2; pale yellowish brown; dolo mudstone;  silty; large cm-sized vugs/cavities lined with megaquartz and lipid dolomite crystals around 4588; tight to moderate porosity; top boundary has incipient brecciation; sharp boundary
4588.2; 4595.2; 5B5/1; light bluish gray; dolo mudstone; dispersed argillaceous; incipient brecciation of tightly fitted clasts; occasional shale wisps; scattered vugs cm-sized; large cavity at 4593.75 with subvertical exposed clasts dolomite; vertical unconnected fractures with solution enhancement; tight; sharp boundary
4595.2; 4597.55; 5Y6/1; light olive gray; brecciated dolo mudstone; discontinuous vertical fractures and vugs; solution enhancement along brecciated boundaries; fair porosity; sharp contact on spin out
4597.55; 4601.5; 5Y6/1; light olive gray; dolo mudstone; argillaceous laminae; very few vugs;  areas of silicified chert above 4695 in breccia fabric; mottled with darker gray to brown along bedding; tight; sharp contact
4601.5; 4610.8; 5Y6/1; light olive gray; dolo mudstone; moderate brecciation; scattered vugs; discontinuous vertical fractures solution enhanced; some brecciation in intervals with cm-size clasts with according variation in clasts and vugs; 4602.5-4601.6 has significant brecciation; partially silicified solution vugs and partial fractures; sharp contact
4610.8; 4611; 5Y6/1; light olive gray; laminated dark; dolo mudstone; argillaceous; tight; no vugs; no clasts; partial fractures truncate at bottom; no flow; sharp contact

Transgressive 
Subaerial exposure

4611; 4616.5; 5Y6/1; light olive gray; finely crystalline micritic dolomite; uniform; occasional wisps of shale; brecciated 4613.3 to 4612 with discontinuous vugs and clast boundaries solution enlarged; sharp contact
4616.5; 4619; 5Y6/1; light olive gray; dolomite packstone; peloidal; laminated; wavy mm laminated bedding; some large cm-size vugs and partial discontinuous fractures significantly solution enlarged; sharp contact with autoclastic brecciation from 4616.5 to 4617
4619; 4623.5; 5Y6/1; light olive gray; dolo mudstone; few dark gray silica nodules; chert nodule with gastropod; scattered vugs; long vertical fractures with dolomite partial filling; sharp contact
4623.5; 4626; 5Y6/1; light olive gray; dolo mudstone; varying alternating light and dark mottling; moderately porous; subvertical fractures;  intervals of brecciation with large vugs and silicified clasts; sharp contact
4626; 4628; 5GY4/1; dark greenish gray; dolo mudstone, argillaceous; tight; occasional vug and stylolite; no solution enhancement; sharp contact
4628; 4643; 5Y6/1; light olive gray; dolo mudstone; varying alternating light and dark mottling; moderately porous; intervals of brecciation with large vugs and silicified clasts (4643-4641, 4638.7-4631.5); partial irregular vertical fractures scattered solution enhanced;  sharp contact
4643; 4644; 5Y6/1; light olive gray; dense light brown greenish brown; dolo mudstone; faint laminations with shale; sharp contact

Subaerial exposure

4644; 4656; 5Y6/1; light olive gray; dolo mudstone; varying alternating light and dark mottling; large discontinuous vugs from 4652-4653 in a brecciated zone; subhorizontal vugs along bedding from 4646-4649 cm's apart; 4645-4646 brecciated zone with discontinuous vugs; sharp contact

4656; 4680; NO RECOVERY

4656.0; 4660.0; Dolo, tan, f-med xln, hrd, vuggy poro, fractured, fresh euthedral dolo cryst in frac planes and vuggs, stylolites & thin lays of gy sh
4660.0; 4668.0; Dolo, tan, f-med xln, AA, some fresh wht chert
4668.0; 4680.0; Dolo, wht-tan, f-med xln, hrd, dns, oolitic, ( packstone ), no visi poro, pcs of fresh, wht & drk chert

4680; 4685.5; 5Y6/1; light olive gray; dolo mudstone; common bedding plane solution enhanced vugs; subhorizontal laminations; 4680 to 4682.5 brecciated with cm-size vugs and discontinuous vertical fractures in brecciated zone; good to moderate porosity; sharp contact
4685.5; 4687.95; 5Y6/1; light olive gray; dolo mudstone; brecciated; clasts extensively silicified with porcelain mottled gray to dark gray chert; common solution enhanced vugs; moderate porosity; broken core due to drilling; sharp contact

4687.95; 4726.5; NO RECOVERY

4687.95; 4714.0; Dolo, wht-tan, f-med xln, hrd, dns, oolitic, ( packstone ), no visi poro, abnd fresh, wht & drk chert, sm opaq oolt, sm tranl, sharp vit
4714.0; 4726.5; Dolo, wht-tan, sucro-med xln, unif, int xln poro, scrtd vuggy poro, ns

4726.5; 4728; 5GY4/1; dolo mudstone; dark greenish gray; finely crystalline; argilliceous; tight; sharp contact

transgressive
Subaerial exposure

4728; 4732.5; 5Y6/1; light olive gray; dolomudstone; breccia; low porosity, with solution enhanced boundaries around the clasts; early solution enhanced pipes with small clasts of carbonate infilling; at the top breccia clasts fill by cement with cm-scale vugs filled with druzy quartz with local solution enhancement of the quart, locally high porosity; overall low porosity; sharp contact
4732.5; 4734; 5G2/1; greenish black to dark greenish gray 5GY4/1; dolo mudstone; dense; thin mm-scale laminated bedding; bedding slightly disrupted at the top; sharp contact
4734; 4739; 5Y6/1; light olive gray; finely crystalline; dolomudstone; grading upwards to slightly darker micritic dolomite with disruption of bedding from 4735-4735.5; partial discontinuous subvertical fractures; poor porosity; sharp contact

transgressive
Sequence boundary?

4739; 4742; 10YR4/2; dark yellowish brown; dolomitic breccia with cm-sized dolomite clasts; extremely vuggy; large vugs; looks like concrete aggregate; associated solution enhanced features with cm-size vugs with baroque dolomite crystals; discontinuous solution enhanced fractures sub-vertical; extremely porous and permeable; (Flow unit!); sharp contact
4742; 4743.7; 10YR4/2; dark yellowish brown; dolomicrite; finely crystalline; 10YR 4/2 very pale orange;  micritic dolomite clasts; sharp; inter-formational conglomerate; disruptive bedding; 4743 to 4742.3 is a dark gray dolomitic shale bed; sharp contact
4743.7; 4745.7; 5Y6/1; light olive gray; dolomite; shaly,faintly horizontally laminated; tight; partial healed fractures; no vugs; sharp contact
4745.7; 4746.5; 10YR4/2; dark yellowish brown; dolomitic oolitic band from 4746.5 to 4746.3; sharp contact with dark yellowish brown; lithoclastic with oolitic grainstone; sharp contact

Transgressive

4746.5; 4747.5; 10BG5/1; greenish gray; shale; dolomitic; laminated mm to cm; wavy bedded; very tight; partial discontinuous vertical fractures; flooding surface; sharp irregular contact
4747.5; 4749.3; 10YR4/2; dark yellowish brown; micritic dolomite; clasts of chert; angular fragments; discontinuous angular fractures; tight; scattered pinpoint vugs
4749.3; 4750; 10YR4/2; dark yellowish brown; dolo mudstone; discontinuous wavy bedding; sharp contact
4750;  4751; 10BG5/1; greenish gray; dolo mudstone; abundant vugs; several  discontinuous fracture with solution along fracture; salt staining; sharp contact 
4751; 4751.5; 10YR6/2; light yellowish brown; dolomitic oolite; medium grained; estimated 10% intergranular porosity; sharp contact
4751.5; 4753; 10YR6/2; light yellowish brown; finely crystalline; dolo mudstone; mottled with light blue gray fine; anastamosing shale laminae; tight; sharp irregular contact
4753; 4756; 5B5/1; medium bluish gray; dolo mudstone; mottled; abundant mm to cm irregular vugs; discontinuous angular fractures with partial cement; sharp contact
4756; 4757; 10YR6/2; light yellowish brown; dolomudstone; horizontal laminations and wisps of 5B5/1 medium bluish gray shale; stromatolite;  sheet cracks and curved upturned mudcracks; very sharp irregular contact with 1" bluish gray shale
4757; 4758.3; 10YR6/2; light yellowish brown; dolomite breccia with large clasts; clasts are angular and fitted; some boundaries are highlighted by solution enhanced margins; stylolites are 5B 5/1 bluish green; chert lens at 4758; bluish green stylolite at sharp irregular contact
4758.3; 4760.6; 10YR7/2; light gray; dense; dolo mudstone; sharp contact
4760.6; 4761; 5N medium gray; chert; dolo micrite; faint wispy horizontal lenses; fine speckled lighter gray
4761; 4771; 10YR6/2; light yellowish brown; dolo packstone; medium to coarse peloids; faint laminations of dark gray argillaceous; scattered irregular vugs; some low angle laminations and wavy bedded enhanced by stylolites; 5B 5/1 medium blueish green;  inclined bedding; disrupted laminated bedding at 64-65; brecciation at 4764.5 to 4766.7; wavy bedding ; sharp contact stylolite enhanced irregular contact
4771; 4774.0; 5B5/1; medium bluish gray; dolo mudstone;  centimeter-thick lenses of alternating beds with moldic pores; darker gray and brown; thin stratiform vugs of mm-size within these various lenses; disrupted; cm-thick intervals with rounded clasts; common vertical fractures that are bedding constrained; 4773 to 4772.7 is a cm-size angular  dolomite breccia with pinkish coarse dolomite clasts in gray micrite with scattered discontinuous fractures which are dissolution enhanced open; 5B 5/1 medium bluish gray stylolitic contact
4774.0; 4775.6; 10YR7/2; light gray; dense; finely crystalline dolo mudstone; subhorizontal mm scale bedding; distinguished by alternations with mud and fine pellet dolo mudstone; distinct irregular fractures limited to bedding; sharp contact
4775.6; 4778.7; 5GY6/1; greenish gray; dolo mudstone; scattered mm to cm sub-horizontal vugs; disrupted crinkly bedding disrupted with cm relief ( stromatolite ); sharp irregular contact with brecciation and clay stylolite
4778.7; 4779.0; 5GY6/1; greenish gray; dolo mudstone; argillaceous finely crystalline; dense; sharp boundary
4779.0; 4779.5; 5GY 6/1; greenish gray; dolomitic mudstone; finely crystalline; dense; creamy brown; autoclastic breccia clasts are angular but fitted; sharp boundary
4779.5; 4781.0; 5GY6/1; greenish gray; argillaceous mudstone; increased gamma ray on log; dense,  non-porous, occasional mm sub-horizontal; poorly bedded at mm-to-cm-scale; disrupted crinkly bedding ( stromatolite ); sharp irregular stylolitic contact

transgressive

4781.0; 4783.0; 10YR6/2; light yellowish brown; medium crystalline dolo mudstone; scattered mm to cm sub-horizontal vugs; disrupted crinkly bedding  ( stromatolite ) for 6 inches with disrupted with cm relief; algal structure; gradational contact
4783.0; 4785.0; 10YR6/2; light yellowish brown; dolo mudstone; dense,  non-porous, occasional mm sub-horizontal; poorly bedded at mm-to-cm-scale; top has clasts a cm below contact with cm-size rounded clasts; thin greenish gray mudstone layer at sharp contact
4785.0; 4788.0; 10YR6/2; light yellowish brown; medium crystalline dolo mudstone; common mm to cm sub-horizontal vugs dissolution enhanced and inter-crystalline porosity; micritic; irregular bedded at mm-to-cm-scale; disrupted crinkly bedding ( stromatolite ) disrupted with cm relief; algal structure; greenish gray stylolite coating at sharp contact
4788.0; 4790.2; 5GY6/1; greenish gray; peloidal dolo packstone; distinctly bedded; mm-to-cm-scale alternating laminated low-angle bedding; some beds separated by shale seams; occasional fine peloid molds in some intervals; sharp horizontal contact
4790.2; 4792.20; 5GY6/1; greenish gray; poorly bedded; many small pin-point vugs ( peloidal dolo packstone ); few faint sub-horizontal cm-thick discontinuous greenish shale carbon, large vug partially filled with interlocking dolomite, sharp horizontal contact
4792.2; 4793.5; 5Y6/1; light olive gray; very finely crystalline dolo micrite; muddy lithology that has been dolomitized; @ 4793' large (fist-sized) vug filled with cm-size baroque dolomite rhombs; cm relief at contact with greenish gray stylolite coating at sharp irregular contact
4793.5; 4795.0; 10YR6/2; light yellowish brown; finely crystalline peloidal dolo packstone; cm-scale faint inclined bedding; intermediate with many small pin-point vugs (peloidal packstone); sharp contact
4795.0; 4797.8; 10YR6/2; light yellowish brown; finely crystalline dolo micrite;  centimeters-thick lenses of darker gray and brown; thin stratiform vugs of mm-size within these various lenses (fenistrate vugs, solution enhanced); common vertical fractures that are bedding constrained; vugs partially filled with clear rhombs; stylolitic contact
4797.8; 4798.30; 5Y6/1; light olive gray; very finely crystalline dolomite; micritic; scattered pyrite; muddy lithology that has been dolomitized; gray wispy shale; common small discontinuous vertical fractures; tight; occasional horizontal vug 0.1" x 1.5"; top irregular sharp stylolitic contact

Roubidoux
Transgressive  
4800.1; 4801.3; 10YR7/2; light gray; fine grained pellet dolo packstone; dominated by pinpoint vugs to cm-size dominant; cm-sized and through-going vugs; very few small vugs; vugs are filled with baroque dolomite; sharp contact
4801.3; 4807; 10YR7/2; light gray; dolo packstone; dense; isolated large subvertical cavernous fist sized vugs at 4807.4, 4806.5, 4806.,7 4805.4; very few small vugs; vugs are filled with druzy quartz; sharp contact
4807; 4808.4; 10YR7/2; light gray; micritic dolo mudstone; pyrite clusters mm-sized; fossil fragments ( crinoids ?); sharp contact
4808.4; 4816; 10YR7/2; light gray; dolo packstone; dense; has bedding with vugs cm-sized subhorizontal along bedding and occasional discontinuous vertical fracture; darkened grains and darkened clasts;  early cavities are filled with the darkened clasts and fine debris ( crinoid and skeletal debris ?); sharp contacts
4816; 4818.6; 10YR7/2; light gray; micritic dolo mudstone; clean; dense; indistinct bedding; high angle to horizontal bedding; bedding alternates; sharp contacts;

4818.6; 4900; NO RECOVERY  === large vugs on MRIL

4818.6; 4830.0; Dolo, tan, f-med xln, with lots of up hole sh from tripping in-out
4830.0; 4850.0; Dolo, tan, f-med xln, hrd, dns, scrtd vuggy poro, fract, lots of uphole, blk & grn sh
4850.0; 4864.0; Dolo, lt crm, f xln, oolitic, fractured, qrtz filling, rexln, qrtz & euhedral dolo, (fracture filling), ns
4864.0; 4884.0; Dolo, wht-crm, vf xln, hrd, fractured, scrtd qrts grains, med-coarse grain, clr, fractured,ns
4884.0; 4900.0; Dolo, tan-lt tan, f-med xln, soft, scrtd vuggy poro., few well rndd qrtz grains, fair-gd poro, ns


4900; 4900.7; 10YR 7/2; light gray; tight; argillaceous dolo wackestone; wispy shale laminae sub horizontal;  sharp boundary
4900.7; 4902; 10YR7/2; light gray; fine grained pellet dolo packstone; dominated by pinpoint vugs to cm-size dominant; packstone alternating with more argillaceous sub horizontal cm-scaled bedding; poor to fair porosity; occasional short discontinuous fractures solution enhanced; sharp contact
4902; 4902.4; 10YR7/2; light gray; tight; argillaceous wackestone; wispy shale laminae sub horizontal;  sharp boundary
4902.4; 4903.3; 10YR7/2; light gray; grained pellet dolo packstone; dominated by pinpoint vugs to cm-size dominant; packstone alternating with more argillaceous sub horizontal cm-scaled bedding; fracture through core at 4903.1; poor to fair porosity; sharp contact
4903.3; 4903.4; 10YR7/2; light gray; tight; argillaceous wackestone; indistinct bedding; sharp boundary
4903.4; 4907; 10YR7/2; light gray; medium- grained pellet dolo packstone; pinpoint vugs to cm-size dominant; cm-bedded; packstone alternating with more argilliceous subhorizontal cm-scaled bedding; reactivation surfaces with cross-stratification; pinpoint vugs along bedding; porosity is fair to poor; sharp contact
4907; 4908.6; 5Y6/1; light olive gray; sandy dolomite; quartz sand mixed with carbonate mud; dolomite cement; tight; many wisps of clay; siliciclastic mix; gradational contact

Gasconade Dolomite
Transgressive  -- 

4908.6; 4909.3; 5Y6/1; light olive gray; autoclastic chert breccia; porcelain displacing fabric; replacement; pinpoint vugs; mottled; abruptly sharp irregular contact
4909.3; 4913.8; 10YR7/2; light gray; medium- grained pellet dolo packstone; low angle cross bedding to horizontal;  more argillaceous interbeds; pinpoint and cm vugs but overall poor porosity; 
4913.8; 4923; 10YR7/2; light gray; dolo wackstone to dolo packstone; medium grained; strings of pinpoint vugs following bedding; scattered cm-size vugs; poor to fair porosity; subhorizontal bedding; 4923 to 4921 has significant irregular large vugs crosscutting the core regular to subhorizontal; no visible autoclasts; scattered vertical fractures (solution enhanced?); above 4918.5 has pinpoint and scattered cm-size vugs subhorizontal;  4918-4918.5 has large irregular vug in addition to others and also has some discontinuous vertical fractures; sharp contact
4923; 4924.3; 10YR7/2; light gray; dolo wackstone; more argillaceous; fine tight; isolated cm-size vug; sharp contact
4924.3; 4928; 10YR7/2; light gray; medium dolo wackestone to dolo packstone; cm-size low angle bedding; alternating beds of coarser and finer; strings of pinpoint vugs following bedding; scattered cm-size vugs; poor to fair porosity; subhorizontal bedding; occasional large vug at 4926.4; sharp contact
4928; 4928.3; 10YR7/2; light gray; more argillaceous; fine wackestone dolomitic; tight; isolated cm vugs; sharp contact
4928.3; 4929.8; 10YR7/2; light gray; medium to fine wackstone to packstone dolomitic; cm-size low angle bedding; alternating beds of coarser and finer; strings of pinpoint vugs following bedding; scattered cm-size vugs; poor to fair porosity; sharp contact
4929.8; 4931.2; 10YR7/2; light gray; fine argillaceous wackestone; low angle bedding; cm-size bedding with shaly boundaries; fewer vugs; sharp contact
4931.2; 4932.3; 10YR7/2; light gray; ; medium to fine wackestone to packstone dolomitic; more vuggy; sharp contact
4932.3; 4934.3; 10YR7/2; light gray; medium to fine dolo wackestone to packstone; wispy clay; cm-size bedding horizontal; scattered vugs; sub-cm beads of vugs following bedding; sharp contact
4934.3; 4936.5; 10YR7/2; light gray ; medium to coarse-grained dolo packstone; peloids; cm sized vugs; cm-size vugs along bedding; fracture cross cutting core at 45 with significant solution enhancement;  sharp contact
4936.5; 4938.3; 10YR7/2; light gray; fine-grained dolo wackestone; more argillaceous; tight; wispy shale laminations
4938.3; 4942.2; 10YR7/2; light gray; dolo packstone; medium-grained; alternating cm-thick bedding, undulating bedding; interbedding with dolomicrite
4942.2; 4944.3; 5Y6/1; light olive gray; dolo wackestone; argillaceous; less porous; slight incipient brecciation 
4944.3; 4950.5; 10YR7/2; light gray; dolo packstone; peloids; medium to coarse-grained cm-thick bedding; cross to planar bedding; pinpoint vugs; enhanced interpartical porosity; up to cm-scale vugs; irregular and subhorizontal vugs tied to bedding; 4946.5-4945 is all pinpoint and enhanced interparticle vugs; 4949-4946.9 is particularly large cm-sized vugs; large vug at 4948.5; sharp contact
4950.5; 4952.2; 10YR7/2; light gray; peloidal dolo packstone; medium-grained with scattered argillaceous seams; tight; low-angle cross stratification; sharp contact
4952.2; 4954.5; 10YR7/2; light gray; dolo micrite; vertical irregular fracture cross cuts core; significant solution enhancement along cm-size vugs extending along and intercepting fracture; scattered sub-cm vugs up to cm-size; cm-scale interbedding dipping slightly; vugs limited to more peloid rich intervals; 
4954.5; 4955.7; 10YR7/2; light gray; [ dolomitic packstone;  ] cross stratification; cm-bedding; high angle truncation; no brecciation; more argillaceous 54.7-55 argillaceous with limited vugs; 4955-4954.7 poor porosity scattered vugs; sharp contact
4955.7; 4956.6; 10YR7/2; light gray; nodular dolomitic packstone; diminished vugs; more argillaceous; tight
4956.6; 4959.3; 5Y6/1; light olive gray; medium grained peloidal packstone; alternating units with finer more argillaceous units; more uniform; cm-size and pinpoint vugs; less vugs more evenly distributed in bands related to bedding; pinpoint and interparticle porespace; 4959 has a large vug lined by medium crystals of baroque dolomite; good porosity
4959.3; 4960.3; 5Y6/1; dolo mudstone; brecciation and solution vugs; solution enhancement around clasts discontinuous subvertical fractures; 4959 to 4959.3 argillaceous and no vugs; gradational contact
4959.7; 4967.3; 5Y6/1; light olive gray; medium grained dolomitic packstone;  incipient breccia; more argillaceous which limits extent of solution cavities; scattered subvertical fractures; 4964 is more argillaceous and no vugs with angular cross stratification and packstone intervals; 4963.3 large vug cross cuts core
4967.3; 4969.8; 5Y6/1; light olive gray; dolo packstone; medium grained; less vugs than below; more intact; more argillaceous than below; argillaceous seams; less solution activity; vugs are irregular cm-size subhorizontal; 4968.5 is a vertical pipe cm-sized vug; gradational contact
4969.8; 4979.3; 5Y6/1; light olive gray; with blue gray clasts of darker medium grained wackestone to packstone dolomite; cm-size alternating bedding; overall pinpoint vugs; some incipient brecciation; gradational contact 
4979.3; 4986.5; 5Y6/1; light olive gray; autoclastic breccia; recrystallized cavities; mottled; light gray coarse dolomite with gray matrix fill of irregular vugs; extensively solution altered; baroque dolomite lines cavities and fills cavities; very high permeability (flow unit); many discontinuous oblique subvertical fractures; decreased argillaceous content; gradational contact
4986.5; 4988.5; 5Y6/1; incipient autoclastic brecciation with disruptive subhorizontal vugs with pelleted packstone on reactivated surfaces and gradational contact; 
4988.5; 4995; 5Y6/1; autoclastic breccia of dolomudstone clast; subhorizontal to irregular vugs cm-sized open; clasts selectively dissolved; subhorizontal solution vugs crosscut the core at 4993, 4993.5, 4993.7; 4992; several-cm size vug cuts across core at 4991 and 4989.1; 4989.5 to 4988.5 argillaceous micritic dolomite with cm-size vugs with chalky white filling
4995; 4997.7; 5Y6/1; light olive gray; dolo mudstone; argillaceous; finely crystalline; silty; tight; small sub-cm vugs

4997.7; 5049.7; NO RECOVERY    large vugs;porosity on MRIL

4997.7; 5030.0; Dolo. f-crs xln, hrd, dns, fractured, intervals of 1" thick fresh wht chert, fracture filled f grain qrtz xln and thin lyrs of qrtz, & euhedral dolo, ns
5030.0; 5049.7; Dolo, off wht-lt tan, f-crs xln, hrd, dns, fresh, euhedrel dolo xln & some clr well rndd qrtz grains, vuggy poro, fractured, thin lyrs of lt grn sh

5049.7; 5052.9; 5Y6/1; light olive gray; argillaceous finely crystalline dolomite; silty; tight; small sub-cm vugs; soft chalky white material and quartz along a subhorizontal solution zone at 5050 smaller vugs lined with quartz

Transgressive
5052.9; 5057; 5Y4/1; olive gray; very finely argillaceous crystalline dolomite; massive; vuggy; extensive dissolution around clasts and filling with coarse dolomite and coarse dogtooth calcite; darkened clasts in a autoclastic breccia; sharp boundary
5057; 5058; 5Y4/1; olive gray; extensive dissolution with what appear to be clasts of autoclastic breccia; crinkly thin ablated laminations; vugs and silicified area looks stromatolitic; sharp contact
5058; 5080; 5Y4/1; olive gray; solid argillaceous finely crystalline micritic dolomite; stylolites; occasional cm-bedded with shale; contact at 5075.6 is transitional with clasts from below being incorporated into overlying packstone; 5074 to 5075 packstone has a moderate amount of vugs and pinpoint and interparticle porosity resulting in fair porosity; 5073.8 to 5073.5 is more of a pelleted packstone with vugs subhorizontal with good porosity; 5072-5072.6 subhorizontal vugs in mottled micritic dolomite; 5070.25 scattered vugs subhorizontal cuts through core and lined with fine to crystalline pink saddle dolomite;  scattered vugs to 5069 following subparallel bedding; 5067-5067.8 is vuggy subparallel to bedding including inclined bedding and has some darker and lighter bands; incipient autoclastic brecciation 5067.5 to 5066.5, vugs moderately abundant at 5066.7-5066.8 and have some white fine grained material partially occluding them; 5056-5058 have varying amounts of brecciation in intervals of incipient brecciation alternating with vuggy cleaner dolomite subhorizontal vugs with some vugs cutting through the entire core with filling between clasts of micritic dolomite; intervals with more shale have fewer vugs; sharp boundary

Trangressive
5080; 5083.25; N8; very light gray; sandy dolomite; massive; tightly cemented; grades up to argillaceous dolomite with gray wispy shale laminations up to 5080; 80-80.5 is an autoclastic breccia with large vugs and cm-sized coarse dolomite fill; very low porosity other than vugged area; sharp contact
5083.25; 5092; 5Y4/1; olive gray; medium sandstone mixed with dolomitic packstone; medium sized peloids; massively bedded; shaly wispy laminations every ~5 cm; uniform and clean; subhorizontal vugs abundant; at 5085 is vuggy cm-sized vertical and horizontal and lined with dolomite and at 5084 is vuggy cm-sized vug filled with euhedral clear quartz; appears these zones are less argillaceous; sharp boundary
5092; 5098.7; 5Y4/1; olive gray; dolomite wackestone to packstone; medium sized peloids; clean; uniform; indistinct bedding; occasional shale lens; scattered subhorizontal oriented cm-size vugs; dolomite lining the vugs; baroque dolomite; poor to fair porosity; top foot is incipient autoclastic breccia with substantial dissolution along fragment boundaries and dolomite crystals lining the vugs at 5092; sharp contact
5098.7; 5100.8; 5Y4/1; olive gray; dolomite cemented sandstone; poorly sorted; dark gray matrix of dolomitic mud; increasing mud dolostone to wackestone as you go upwards; scattered shaly argillaceous intervals; discontinuous; cleaner sandstone at the bottom has numerous sub-cm vugs; subvertical discontinuous fractures; moderate porosity from 5097-5098.5; gradational contact

transgressive
5100.8; 5101.3; 5Y4/1; olive gray; incipient autoclastic breccia; silicified; cm-size vugs; disrupted bedding; vugs formed in spaces around clast edges; selective silicification of clasts; sharp contact
5101.3; 5103.2; 5B7/1; light bluish gray; dolomitic mudstone; scattered vugs sub-cm-scale and subparallel to bedding; few vertical fractures discontinuous; poor porosity; sharp contact
5103.2; 5108.8; 5Y4/1; olive gray;  dolomitic mudstone; chert nodules along subhorizontal beds; voids filled with dolomite; mottled with anastamozing clay; gradational contact
5108.2; 5112.5; 5Y4/1; olive gray; dolomitic packstone to mudstone; fine pelleted; interparticle porosity; pinpoint vugs; poor porosity; bioturbated; muddier upwards; dolomite; silty peloid argillaceous 
5112.5; 5116; N3; dark gray; gray dolomitic mudstone; silty;  irregular vugs cm-sized; discontinuous vertical fractures with no dissolution enhancement; moderate porosity; gradational contact
5116; 5119; N3; dark gray; packstone with peloids; scattered vugs; pinpoint interparticle to cm size vugs subhorizontal following faint cm-scale bedding following peloidal; solution dissolution; some vugs are mostly occluded with coarse dolomite larger ones being rimmed; gradational contact
5119; 5128; N3; dark gray; wackestone to packstone; grainstone; fine to medium; possible bivalves; occasional/sparse  vug filled with dolomite; tight; no fractures; gradational contact
5128; 5143.4; 5Y4/1; olive gray; sandstone with micritic dolomite matrix; frosted grains; medium grade; rounded; increasing amounts of dolomite mudstone towards the top; bivalves; bioturbated; cm-scale mottling; scattered black lithoclasts; patchy vugs filled with pink dolomite; porous towards the bottom couple feet; gradational contact  

GUNTER SANDSTONE
Transgressive 
5143.4; 5147.7; 5Y4/1; olive gray; dolo wackestone; fine-grained peloids; argillaceous; some stratification, clay seams horizontal; cm-size bedding and variations in color; sharp contact
5147.8; 5149.7; olive gray; 5Y4/1; dolo packstone; fine to medium; micro porosity; some interparticle pore space; some small vugs; scattered; bioturbated; sharp boundary
5149.7; 5154; greenish gray 5G6/1; wackestone to packstone; fine; argillaceous; grades up to poorly sorted medium to fine grained bioclastic wackestone to packstone; cm-size alternating beds; wispy dispersed argillaceous clay; sharp boundary
5154; 5163.7; light olive gray; wackestone to mudstone; fine to medium; peloidal grainstone; cm-scale alternating beds of fine pellet and coarser peloids; low angle planar cross stratification; tight; partial discontinuous fractures with no solution enhancement; no vugs; gradational contact to skeletal packstone to wackestone cm-thick beds with shaly clay rich intervals and darkened shell fragments ( brachiopods ?); grading upwards to coarse grained packstone with blackened carbonate grains peppered with small white bivalve fragments; cm-scale bedded from fine to coarse distinguished by changes in grain-size; no porosity

CAMBRIAN
TRANSGRESSION
5165.8; 5173; granite; grayish orange pink mixed with N3 dark gray; weathered; patches of orthoclase and alteration around it; top of C horizon; sharp boundary
5173; 5178.75; 5R5/4; granite; moderate red; epidote dark yellowish green 10GY 4/4 along natural fractures; unweathered; sharp boundary