KGS--Franklin County Geology--Stratigraphic Sections 3

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Stratigraphic Sections

Each stratigraphic unit shown on Plate 2 is represented here by at least one measured section description. All descriptions pertain to Franklin County exposures with the exception of A9 and A10, which were measured and described in Anderson County.

A sections || B sections || C sections || D sections

C1--Composite section of exposures from near cen. S line SE 1/4 sec. 17, T. 19 S., R. 18 E., to cen. S line sec. 18, T. 19 S., R. 18 E.			Thickness (feet)
Oread Limestone
	Toronto Limestone Member
		Limestone, brown, thin to thick and moderately even bedded, microcrystalline; brachiopods, crinoids, fusulinids; incomplete thickness	11.0
Lawrence Shale
		Shale, upper 14 feet tan and silty, lower 4 feet gray and clayey	18.0
		Coal, soft, bituminous	1.0
		Shale, upper 1.5 feet gray, middle 1.5 feet green, basal 2 feet tan, silty to clayey	8.0
		Limestone, gray to brown, single bed; Myalina, Neospirifer, bryozoans, crinoids	1.0
		Shale, gray to tan, silty; mostly covered	25.0
		Siltstone, brown, single thick bed	4.0
		Shale and siltstone, tan, small amounts of very fine grained sandstone; about	60.0
	Total thickness of Lawrence Shale		117.0
Stranger Formation
	Haskell Limestone Member
		Limestone, blue gray, single even bed, microcrystalline matrix contains abundant Ottonosia; Chonetes, Neospirifer, marginiferids, fusulinids; sparse phosphatic nodules weathered free from section immediately above the Haskell	1.5
	Vinland Shale Member
		Covered interval; about	12.0
	Westphalia Limestone Member
		Limestone, brown, microcrystalline, surface weathers hummocky; fusulinids, Osagia	0.5
		Limestone, brown, shaly; bryozoans, Composita, crinoids	2.5
	Total thickness of Westphalia Limestone		3.0
	Tonganoxie Sandstone Member
		Shale, tan, bedding indistinct, weathers into irregular blocks, septarian concretions and thin sandstone stringers in the basal part; exposed thickness	8.0

C2--Water well log of section near the cen. S line sec. 30, T. 18 S., R. 18 E. (State Geological Survey of Kansas files). Description, generalized, is shown by symbols on Plate 2.

C3--Composite section of an escarpment exposure near the cen. W line SW 1/4 sec. 14, T. 18 S., R. 13 E. (Toronto Limestone and Lawrence Shale); a road cut-streambank exposure near the cen. W line sec. 19, T. 18 S., R. 19 E. (Weston Shale to Haskell Limestone); and a drillers log (Stanton Limestone and 75 feet of Weston Shale) of section near cen. sec. 12, T. 18 S., R. 18 E. (Drillers log in State Geological Survey of Kansas files.) Description, generalized, is shown by symbols on Plate 2.			Thickness (feet)
Oread Limestone
	Toronto Limestone Member
		Limestone, brown, thin and even bedded, ferruginous; brachiopods, corals, crinoids, fusulinids	9.0
Lawrence Shale
		Shale, gray, paper-thin strata weather into in-regular flakes, clayey; goethite concretions	30.0
		Limestone, light gray on fresh surfaces, weathers tan, bedding indistinct, pseudobrecciated	2.5
		Claystone, drab, weathers into irregular blocks	1.5
		Siltstone, tan, weathers into plates, micaceous	3.0
		Shale, drab, weathers into irregular flakes and blocks, clayey; poorly preserved plant fossils; about	5.5
		Limestone, blue gray, nodular, micaceous, silty; poorly preserved plant fossils	2.0
		Shale, tan to gray, paper-thin strata weather into irregular flakes, silty, micaceous; goethite concretions; poorly preserved plant remains	5.5
		Coal; contains claystone stringers	0.2
		Siltstone and silty shale, gray green to tan, bedding indistinct, weathers into irregular blocks; goethite concretions; mostly covered; about	40.0
	Total thickness of Lawrence Shale		90.2
Stranger Formation
	Haskell Limestone Member
		Limestone, blue gray, single vertically jointed bed, microcrystalline, fractures conchoidally; Meekella, Neospirifer, crinoids, echinoid spines, fusulinids, spired gastropods	1.0
	Vinland Shale Member
		Shale, tan, weathers to irregular flakes, silty, micaceous; about	5.0
		Shale, tan, paper-thin strata weather to flakes, silty, micaceous; contains large blue-gray septarian limestone concretions	4.0
		Shale, drab, weathers to flakes, silty, micaceous	4.0
	Total thickness of Vinland Shale		13.0
	Tonganoxie Sandstone Member
		Sandstone, tan, massive, cross stratified, quartzose, very fine to fine grained, friable	40.0
		Coal, discontinuous	0.5
	Total thickness of Tonganoxie Sandstone		40.5
	Total thickness of Stranger Formation		54.5
Weston Shale
		Shale, blue gray to gray green upward, micaceous, clayey to silty upward, grades into overlying unit; exposed thickness	2.0

C4--Drillers log of section near the cen. NE 1/4 SW 1/4 sec. 7, T. 18 S., R. 18 E. (State Geological Survey of Kansas files). Description, generalized, is shown by symbols on Plate 2.

C5--Composite section of a streambank exposure in the NE 1/4 sec. 33, T. 17 S., R. 18 E. (Toronto Limestone and upper part of Lawrence Shale) and a road cut exposure near the cen. N line sec. 31, T. 17 S., R. 19 E. (Ireland Sandstone to Haskell Limestone).			Thickness (feet)
Oread Limestone
	Snyderville Shale Member
	Toronto Limestone Member
		Limestone, brown, thin to thick and even bedded, ferruginous, microcrystalline; Chonetes, Composita, Punctospirifer, crinoid columnals, fenestrate and ramose bryozoans	8.0
Lawrence Shale
		Shale, covered interval	3.0
		Coal	0.3
		Shale, covered interval	2.5
		Shale, tan, weathers into plates, silty, micaceous; poorly preserved plant fossils common	5.5
		Coal	1.0
		Shale, drab, paper-thin strata flake upon weathering, clayey, micaceous; siltstone stringers	14.0
		Shale, covered interval	5.5
		Claystone, drab	6.5
		Shale, covered interval	10.0
		Shale, tan, weathers into irregular flakes, silty	13.0
		Conglomerate, reddish, limestone and limonite pebbles in a quartzose sandstone matrix; sparse invertebrate fossil fragments	1.5
		Siltstone, brown, weathers into plates; limonitic concretions	9.0
		Shale, gray, paper-thin beds; profuse poorly preserved plant fossils	2.0
		Limestone, brown, shaly, arenaceous, micaceous; plant and invertebrate fossils	2.0
	Ireland Sandstone Member
		Sandstone, brown, massive, cross stratified, quartzose, very fine to floe grained, micaceous; poorly preserved plant fossils	40.0
		Conglomerate, gray, weathers into irregular slabs, limestone and limonite pebbles, sparse phosphatic nodules, quartzose sandstone matrix; Chonetes, Meekella, Neospirifer, fusulinids, and sparse plant fossils; fragile spines on chonetids intact; probably derived from Robbins Shale and Haskell Limestone	5.0
	Total thickness of Lawrence Shale		120.8
Stranger Formation
	Vinland Shale Member

C6--Composite section of a road cut exposure along the S line SE 1/4 sec. 15, T. 17 S., R. 18 E. (Toronto Limestone to Robbins Shale); a log of a test hole drilled at the SE cor. sec. 15, T. 17 S., R. 18 E. (Robbins Shale to Haskell Limestone); and a test hole drilled in the NE 1/4 SE 1/4 NE 1/4 sec. 15, T. 17 S., R. 18 E. (Haskell Limestone to Stoner Limestone).			Thickness (feet)
Oread Limestone
	Toronto Limestone Member
		Limestone, gray on fresh surfaces, weathers tan, bedding indistinct, weathers into a slabby rubble; brachiopods, crinoids; incomplete thickness	1.0
Lawrence Shale
		Shale, gray to tan, silty to sandy; poorly preserved plant fossils	8.0
		Coal, upper Williamsburg	0.5
		Shale, gray to tan, bedding indistinct, weathers into irregular blocks, clayey to silty	5.0
	Ireland Sandstone Member
		Limestone, gray, weathers into plates	1.0
		Sandstone, light gray to tan, very fine to medium grained, massive, cross stratified	31.0
		Coal	1.5
		Shale, gray, clayey to silty	2.5
		Sandstone, light gray, cross stratified, fine grained	13.0
		Shale, gray, silty to sandy	1.0
		Sandstone, gray to tan, a single thick bed	2.0
		Shale, gray, silty to sandy	0.5
		Sandstone, gray to tan, massive, cross stratified, very fine to medium grained; about	28.0
		Coal, fragmented and included in basal part of Ireland Sandstone; about	3.0
	Total thickness of Lawrence Shale		97.0
Stranger Formation
	Robbins Shale Member
		Shale, gray blue, clayey, carbonaceous films along bedding surfaces in uppermost foot	5.0
		Shale, gray, clayey to slightly silty	2.0
		Shale, gray, extremely clayey, plastic	11.0
	Total thickness of Robbins Shale		18.0
	Haskell Limestone Member
		Limestone, gray on fresh surfaces, weathers gray to tan, even bedded, microcrystalline matrix contains cross sections of abundant "heads" of Ottonosia; brachiopods, crinoids, fusulinids	2.1
	Rock Lake-Vinland Shale
		Siltstone-sandstone, tan, even bedded, quartzose; basal contact gradational	19.0
		Shale and siltstone, gray, alternating silty shale and siltstone, carbonaceous streaks at several horizons	116.0
		Shale, gray, clayey to slightly silty	5.0
		Siltstone-shale, gray	20.0
		Sandstone, tan, very fine grained	2.5
		Coal	0.7
	Total thickness of Rock Lake-Vinland Shale		163.2
(Westphalia and South Bend Limestones absent from this locality. Section between Haskell Limestone base and Stoner Limestone top could not be subdivided.)
Stanton Limestone
	Stoner Limestone Member
		Limestone, gray to white; penetrated by drill	1.0

C7--Composite section of road cut exposures from near cen. W line sec. 12 to near cen. W line sec. 13, T. 17 S., R. 18 E. (upper part of Tonganoxie Sandstone to Toronto Limestone) and streambank exposures near cen. sec. 11, T. 17 S., R. 18 E. (Weston Shale to Haskell Limestone).			Thickness (feet)
Oread Limestone
	Toronto Limestone Member
		Limestone, gray; brachiopods, crinoids; incomplete thickness	2.0
Lawrence Shale
		Shale, tan, clayey to silty	12.0
		Sandstone, siltstone, and silty shale, tan, alternating beds	26.0
	Ireland Sandstone Member
		Sandstone, tan, massive, cross stratified, very fine grained, friable	53.0
	Total thickness of Lawrence Shale		91.0
Stranger Formation
	Robbins Shale Member
		Shale, gray, clayey to silty upward	5.5
	Haskell Limestone Member
		Limestone, gray, even bedded, prominent vertical jointing, microcrystalline, fractures conchoidally; productids, Meekella, Neospirifer, Ottonosia; poorly exposed; about	1.7
	Vinland Shale Member
		Shale, gray, clayey to silty	4.0
		Coal smut	0.05
		Shale, gray to tan, clayey to silty	10.0
		Coal stringer	0.3
		Shale, gray, silty, grades downward into siltstone	10.0
	Total thickness of Vinland Shale		24.35
	Tonganoxie Sandstone Member
		Sandstone and silty shale, tan, very fine grained, massive sandstone cross stratified, silty shale platy	45.0
		Coal stringer	0.3
		Siltstone to sandstone; thickness irregular	0.0 to 1.0
	Total thickness of Tonganoxie Sandstone		46.3
	Total thickness of Stranger Formation		77.85
Weston Shale
		Shale, gray blue, clayey; base covered; exposed thickness	1.5
(On the basis of outcrop and drillers log data, the thickness of Weston Shale at this locality is approximately 80 feet.)

A sections || B sections || C sections || D sections

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Kansas Geological Survey, Geology of Franklin County
Web version July 2002. Original publication date Jun. 1963.
Comments to webadmin@kgs.ku.edu
The URL for this page is http://www.kgs.ku.edu/General/Geology/Franklin/06_sect3.html