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Logs of Wells and Test Holes

T. 13 S. || T. 14 S. || T. 15 S. || T. 16 S. || T. 17 S. || T. 18 S.

16-30-29aa--Sample log of test hole in the NE cor. sec. 29, T. 16 S., R. 30 W., Lane County, drilled by State Geological Survey, September 1948. Surface altitude, 2,872.7 feet; depth to water level, 116.5 feet September 18, 1948. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Silt, sandy, light brown 2 2
Tertiary--Pliocene
Ogallala formation
Clay and sand 8 10
Clay and silt, calcareous, light tan to gray 7 17
Caliche 10 27
Caliche and medium sand, thin alternating layers 7 34
"Mortar bed"; contains sand and caliche 10 44
Sand, fine, and calcareous brown silt 4 48
"Mortar bed"; contains sand and gravel 10 58
Silt and fine sand, brown 2 60
Silt; contains sand and gravel 3 63
"Mortar bed"; contains sand and gravel 27 90
Sand, coarse to fine; contains some gravel 10 100
Silt and very fine sand, light brown 16 116
Sand, fine to coarse 4 120
Sand, very fine, and brown clay 10 130
Clay, light gray, and fine sand 10 140
Sand, fine to medium 10 150
Gravel, rock fragments and quartz grains, coarse, sub-angular 6 156
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow to tan 4 160

16-31-29dc--Drillers log of test hole in the SW SE sec. 29, T. 16 S., R. 31 W., Scott County. Norman Harper, owner, Weishaar and Son, driller. Surface altitude, 2,947 feet. Thickness,
feet		 Depth,
feet
Clay 20 20
"Jip" [caliche] 22 42
Sand "jip" 28 70
Clay 51 121
Sand, fine 16 137
"Jip" and clay 6 143
Sand and gravel 24 167
Shale 13 180

16-32-9bb--Sample log of test hole in the NW NW sec. 9, T. 16 S., R. 32 W., Scott County, drilled by State Geological Survey, 1951. Surface altitude, 3,002.0 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Soil, silt, and clay, black; contains some sand 2 2
Clay, compact to silty, dark gray 1 3
Clay, silty, tan to tan gray 3 6
Silt, tan gray to gray green 11.5 17.5
Clay, limy, silty, light tan 3.5 21
Silt, clayey to fine sandy, limy, nodular, tan to light gray 4 25
Tertiary--Pliocene
Ogallala formation
Silt and fine sand, very limy, cemented, white 6 31
Sand, silty, cemented, fine to medium, brown to tan brown 17 48
Sand, fine to coarse; contains some fine to coarse gravel 3 51
Clay, sandy, tan yellow 4 55
Clay, sandy, red brown 4 59
Clay and silty caliche, sandy, interbedded, light tan 11 70
Clay, silty to sandy, brown to dark brown 5 75
Sand, fine to coarse; contains brown clay 7 82
Clay, silty and sandy, tan brown and light tan 10 92
Sand, coarse to fine; contains some gray clay 2 104
Sand, coarse to fine; contains some tan silt 22 126
Sand and gravel, clayey, gray 9 135
Sand, fine to coarse; contains some yellow silt 13.5 148.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, clayey, silty, tan yellow and yellow 8.5 157
Chalk, clayey, gray; contains some blue chalk 3 160

16-32-20dd--Sample log of test hole in the SE SE sec. 20, T. 16 S., R. 32 W., Scott County, drilled by State Geological Survey, 1951. Surface altitude, 3,003 feet. Thickness,
feet		 Depth,
feet
Road fill and soil 3.5 3.5
Quaternary--Pleistocene
Sanborn formation
Silt, tan gray to gray green 14.5 18
Silt and clay, limy, light tan 8 26
Tertiary--Pliocene
Ogallala formation
Silt, very limy, white, and tan sandy clay 2 28
Sand, coarse to fine, and some tan sandy clay 3 31
Silt and sand, clayey, limy, tan to light tan 6 37
Silt and fine sand, very limy, cemented, white 2 39
Sand, cemented, tan to brown; contains some silty caliche 9 48
Silt and fine sand, limy, tan to light tan; contains some tan to light-tan limy clay 9.5 57.5
Sand, medium to fine, and silt 3.5 61
Sand and silt, fine, limy, light tan; contains some imbedded coarse to medium sand 17 78
Clay, silty, limy, tan and tan gray; contains some interbedded cemented fine limy sand 5 83
Clay and sand, silty, interbedded, gray 1.5 84.5
Clay, silty and sandy, tan and tan brown; contains some imbedded coarse sand 7.5 92
Sand and clay, interbedded, brown 7 99
Sand, fine to medium; contains some tan clay 8 107
Clay, silty, tan yellow 14 121
Sand, fine to coarse, and some silt 9 130
Sand, fine to coarse, and some silt; contains some fine gravel 10 140
Sand, fine; contains some soft silty limestone 10 150
Sand, fine; contains some silty limestone 10 160
Sand, fine to medium; contains some brown silt 10 170
Sand, fine to coarse, and fine to medium gravel 9 179
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, silty, yellow 7.5 186.5
Chalk, clayey, gray 1.5 188

16-32-24cc--Sample log of test hole in the SW SW sec. 24, T. 16 S., R. 32 W., Scott County, drilled by State Geological Survey, 1951. Surface altitude, 2,971.0 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Soil, silt, and clay, black 4.5 4.5
Silt, tan gray 11 15.5
Silt and clay, limy, tan to light tan; imbedded coarse to fine sand 8.5 24
Tertiary--Pliocene
Ogallala formation
Clay, very limy, light tan to white; contains some imbedded sand 5 29
Clay and silt, limy to very limy, nodular, tan to light 10 39
Sand, fine, cemented, brown; contains some limy silty clay 3 42
Silty to clay, limy, tan to white; contains some imbedded sand 6.5 48.5
Clay, sandy, tan gray 2.5 51
Clay, silty, limy, tan to white; contains some imbedded sand 3 54
Clay, sandy, tan gray 1 55
Silt, very limy, white 2 57
Clay, sandy, tan to brown 1.5 58.5
Sand, coarse to fine 5 63.5
Silt, clayey, limy, tan to white; partly nodular and sandy 24.5 88
Clay, silty to limy, tan to brown; contains some sand 3 91
Clay, silty, brown 10 101
Clay, silty, brown; contains some sandy clay 16 117
Sand, coarse to fine, and fine gravel; contains some gray clay 4 121
Sand, coarse to fine; contains some clay 10 131
Sand, fine to coarse; contains some tan sandy clay 29 160
Sand, fine to coarse, and fine to medium gravel 15 175
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, silty, yellow 4 179
Chalk, clayey, gray 1 180

16-33-17bb--Drillers log of well in the NW NW sec. 17, T. 16 S., R. 33 W., Scott County; irrigation well, George Epler, owner, Ben Hasz, driller. Surface altitude, 3,080 feet. Thickness,
feet		 Depth,
feet
Top soil 23 23
"Gyp" [caliche] 7 30
"Gyp" rock and clay 66 96
Clay and rock, sandy 37 133
Sandstone 7 140
Sand, tight, fine 9 149
Sand, loose, fine 4 153
Sandstone and sand 5 158
Clay, sandy 4 162
Gravel 12 174
Shale 2 176

16-33-18aa--Sample log of test hole in the NE NE sec. 18, T. 16 S., R. 33 W., Scott County, drilled by State Geological Survey, 1951. Surface altitude, 3,081.4 feet. Thickness,
feet		 Depth,
feet
Road fill and soil; silt and clay, black 4.5 4.5
Quaternary--Pleistocene
Sanborn formation
Silt, gray green; contains some fine sand 16.5 21
Silt and clay; contains some very limy tan to light-tan fine sand 9.5 30.5
Tertiary--Pliocene
Ogallala formation
Limestone, silty, medium hard, white 3.5 34
Sand, fine to medium, limy, and tan silty clay 5 39
Clay, limy, tan and chalky white 3 42
Silt, limy 15 57
Sand, fine, cemented with silty and clayey caliche, tan to brown 18 75
Sand, silty, fine to medium, brown 3.5 78.5
Sand, coarse to medium fine; contains some light-tan limy silt 26.5 105
Clay, silty, yellow; contains some medium and fine sand, imbedded 3 108
Sand, fine to medium 40 148
Sand, fine to medium, and some coarse sand 10 158
Sand, medium to coarse 13.5 171.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, silty, yellow 4.5 176
Chalk, clayey, medium hard, gray 4 180

16-33-25ac--Sample log of test hole in the SW NE sec. 25, T. 16 S., R. 33 W., Scott County, drilled by State Geological Survey, 1951. Surface altitude, 2,877 feet. Thickness,
feet		 Depth,
feet
Road fill 2.5 2.5
Quaternary--Pleistocene
Sanborn and Meade formations
Clay, silty, black 2.5 5
Clay and silt, tan brown; contains some coarse sand 10 15
Sand, fine and medium fine 10 25
Sand, fine to medium 3 28
Clay, blue gray; contains some sand 11 39
Silt, sandy to clayey, tan to tan brown; contains some coarse imbedded sand 14 53
Sand, fine to medium 11 64
Sand, fine to medium; contains some clay 10 74
Sand, coarse to fine; contains some clay 10 84
Sand, coarse to fine, and fine to medium gravel 7.5 91.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, silty, yellow; contains some imbedded coarse sand 8.5 100
Chalk, clayey, gray 2 102

16-33-29bc--Sample log of test hole in the SW NW sec. 29, T. 16 S., R. 33 W., Scott County, drilled by State Geological Survey, 1951. Surface altitude, 3,086.3 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Soil, silt, and clay, dark gray and black 3.5 3.5
Silt; contains some fine sand 17.5 21
Tertiary--Pliocene
Ogallala formation
Clay and silt, limy, tan, light tan, and white 9 30
Clay, silty, limy, light tan to white 17 47
Sand, coarse to medium 11 58
Caliche, clayey and silty, soft to medium soft, white 19 77
Sand, medium to coarse; contains some tan-brown silty clay 20 97
Sand, medium to coarse; contains some tan-brown clay 11 108
Sand, medium fine to coarse, blocky, and brown clay; contains some interbedded silty limestone 10 118
Sand, medium fine to coarse 42 160
Sand, medium fine to medium coarse, and tan-brown clay 10 170
Sand, medium fine to medium coarse 8.5 178.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, silty, yellow 16.5 195
Chalk, clayey, medium hard, gray 5 200

16-34-9cc--Drillers log of well in the SW SW sec. 9, T. 16 S., R. 34 W., Scott County; irrigation well, Roy Tucker, owner; Ben Hasz, driller. Surface altitude, 3,145.5 feet. Thickness,
feet		 Depth,
feet
Top soil 19 19
"Gyp" [caliche] and sand rock 4 23
Rock 1 24
Sand rock and "gyp" 17 41
Sand 3 44
Sand rock and "gyp" 2 46
Rock 4 50
Sand rock and "gyp" 13 63
Sand, loose 16 79
Sand rock, "gyp", streaks of rock 16 95
Rock 4 99
Clay 4 103
Sand, fairly loose 13 116
Sand, loose, coarse 6 122
Clay, yellow 8 130
Sand, fairly loose 5 135
Clay, sandy 10 145
Sand, loose, fine 1 146
Clay, sand streaks 10 156
Shale 0 156
[Incomplete; total depth 181 feet]

16-34-13bb--Drillers log of irrigation well in the NW NW sec. 13, T. 16 S., R. 34 W., Scott County; Frank Kottwich, owner; Ben Hasz, driller. Surface altitude, 3,103.7 feet. Thickness,
feet		 Depth,
feet
Top soil 23 23
"Gyp" [caliche] 16 39
"Gyp" rock 21 60
Clay, sandy 10 70
Sand rock 4 74
Hard rock 3 77
Clay, sandy 15 92
Sand rock and clay 41 133
Sand, bright, fine, and clay, streaks of sand rock 22 155
Gravel streaks, clay at 164 feet 25 180
Clay 8 188
Shale 0 188

16-34-16aa--Sample log of test hole in the NE NE sec. 16, T. 16 S., R. 34 W., Scott County, drilled by State Geological Survey, 1951. Surface altitude, 3,131 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Soil, silt, and clay, black 5 5
Clay, tan brown; contains some silt 9 14
Silt, gray green; contains some tan clay 5 19
Clay, silty, tan brown 7.5 26.5
Tertiary--Pliocene
Ogallala formation
Clay and silt, limy, tan brown to light gray; contains some silty limestone concretions 8.5 35
Silt, limy, medium soft, white, and silty light-tan clay 18 53
Clay, very sandy, tan; contains coarse to medium sand and imbedded fine gravel 7 60
Clay and silt, limy, light tan; contains imbedded sand 10 70
Clay to fine sand, cemented; contains tan silty limestone 10 80
Clay, silty and sandy, tan brown to brown; contains some light-tan limy clay 10 90
Sand, fine to coarse; contains some clay 10 100
Sand, coarse to medium 4.5 104.5
Sand, fine, limy; contains imbedded coarse sand, medium gravel, and some limy tan clay 6.5 111
Clay, silty and limy, tan 4 115
Sand, fine to medium fine; contains some brown silt 11 126
Sand, fine to medium; contains some tan to light-tan limy clay 10 136
Sand, fine to medium 20 156
Sand, medium to coarse 18 174
Cretaceous--Gulfian
Pierre shale
Clay and weathered shale, yellow 5 179
Shale, clayey, medium hard, gray 5 184

16-34-17bc--Drillers log of test hole in the SW NW sec. 17, T. 16 S., R. 34 W., Scott County; H. T. Witham, owner; Weishaar and Son, driller. Thickness,
feet		 Depth,
feet
Clay 37 37
"Jip" [caliche] and clay 35 72
"Jip" and sand 25 97
Sand, fine 17 114
Sand rock 3 117
Sand, fine 15 132
"Jip" 23 155
Sand, fine, dirty 32 187
"Jip" and clay 5 192
Sand, fair 10 202
Shale 3 205

16-34-27cc--Sample log of test hole in the SW SW sec. 27, T. 16 S., R. 84 W., Scott County, drilled by State Geological Survey, 1951. Surface altitude, 3,128.8 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Soil, silt, and clay, black 2.5 2.5
Silt, gray green to tan gray; contains some fine sand 9.5 12
Clay; contains some tan silt 7 19
Tertiary--Pliocene
Ogallala formation
Clay, silty, limy, light tan to white 9 28
Sand, fine, cemented, and limy clay and silt interbedded; tan to light tan 7 35
Clay, limy, tan; interbedded with silty caliche 6 41
Sand, medium to fine 6 47
Clay to silt, limy, nodular; contains some medium to coarse sand 11 58
Silt and limy fine sand; contains some tan clay 14 72
Clay, silty, gray to tan gray 5 77
Sand, coarse to fine; contains some tan limy clay 4 81
Sand and silt, clayey, brown; contains some medium sand 5 86
Clay, tan to brown, and coarse to fine sand 11 97
Sand, medium to coarse, and fine to medium gravel; contains some tan limy clay 14 111
Sand, medium to fine; contains some limy clay 39 150
Sand, medium to fine, and brown silty clay 10 160
Sand, fine to medium, and tan to light-tan limy silt 10 170
Sand, fine to medium 17 187
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow 13.5 200.5
Chalk, clayey, medium hard, gray 7.5 208

16-35-1dd--Sample log of test hole in the SE cor. sec. 1, T. 16 S., R. 35 W., Wichita County, drilled by State Geological Survey, September 1947. Surface altitude, 3,174.5 feet. Thickness,
feet		 Depth,
feet
Road fill 4 4
Quaternary--Pleistocene
Sanborn formation
Silt, clayey, light brown 21 25
Tertiary--Pliocene
Ogallala formation
Clay, silty, calcareous, white 5 30
"Mortar bed" and caliche 20 50
Caliche, very sandy, white 20 70
Sand, fine to medium, compact, slightly calcareous, brown; contains coarse sand and fine to medium gravel 10 80
Gravel, fine to medium, and coarse sand 9 89
Sand, fine, brown 12 101
Sand, coarse to medium; contains fine partly cemented brown sand 19 120
Sand, medium to coarse; contains fine to coarse gravel 10 130
Sand, coarse to medium, contains fine gravel and sand 23 153
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, soft, yellow brown 9 162
Chalk, gray 18 180

16-35-31da--Drillers log of irrigation well in the NE SE sec. 31, T. 16 S., R. 35 W., Wichita County; H. O. Burns, owner, Ben Hasz, driller. Surface altitude, 3,229.8 feet. Thickness,
feet		 Depth,
feet
Top soil 20 20
Gypsum rock [caliche] and clay 25 45
Gypsum rock 13 58
Sand 3 61
Sandstone 14 75
Clay 15 90
Clay, sandy 37 127
Sand, fine 19 146
Rock 7 153
Sand, fine 21 174
Clay, sandy 3 177
Sand 3 180
Gravel 19 199
Clay, yellow 2 201

16-35-36dd--Sample log of test hole in the SE SE SE sec. 36, T. 16 S., R. 35 W., Wichita County, drilled by State Geological Survey, August 1947. Surface altitude, 3,170.3 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Silt, black 3 3
Silt, brown 6 9
Clay and silt, compact, brown 11 20
Tertiary--Pliocene
Ogallala formation
Clay, silt, and fine sand, compact, calcareous, tan 17 37
Gravel, fine, and coarse sand 2 39
"Mortar bed", hard, white 3 42
Silt, sandy, calcareous, tan 7 49
"Mortar bed", white to tan 21 70
"Mortar bed", sandy, white to tan 20 90
Sand, coarse to medium; contains silt and fine sand 40 130
Sand, coarse to medium; contains fine sand and fine caliche fragments 20 150
Sand, medium; contains clayey silt and fine sand 10 160
Sand, coarse to medium 20 180
Gravel, fine, and coarse sand 10 190
Gravel, medium to fine 8 198
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, gray 9 207

16-36-4cc--Sample log of test hole in the SW SW SW sec. 4, T. 16 S., R. 36 W., Wichita County, drilled by State Geological Survey, September 1947. Surface altitude, 3,301.7 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Silt, dark brown 4 4
Silt, light brown 19 23
Tertiary--Pliocene
Ogallala formation
Clay, silty, white 4 27
Clay, silty; contains sand and gravel 5.5 32.5
"Mortar bed", hard, calcareous, white to brown 20.5 53
Gravel, medium to fine, and coarse sand 3 56
Sand, coarse to medium; contains fine gravel 4 60
Sand, coarse, and fine gravel; contains medium to coarse gravel 10 70
Sand, coarse, and fine gravel; contains medium to fine sand 10 80
Sand, coarse, and fine gravel; contains medium gravel 1.5 81.5
Sand, fine, and brown sticky silt 1.5 83
Gravel, fine, and coarse sand 6 89
Sand, fine, and compact brown silt 4 93
Sand, coarse, and fine gravel 7 100
Sand, coarse to medium; contains fine sand and silt 10 110
Limestone, impure, hard, white 2 112
Sand, coarse, and fine gravel 10 122
Clay, sandy, yellow 3 125
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, clayey, yellow 7 132
Chalk, clayey, gray 3 135

16-37-33cc--Sample log of test hole in the SW SW SW sec. 33, T. 16 S., R. 37 W., Wichita County, drilled by State Geological Survey, 1950. Surface altitude, 3,367.3 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Silt, black 2 2
Silt, tan 8 10
Silt, reddish brown 3 13
Tertiary--Pliocene
Ogallala formation
Silt and clay, sandy, calcareous, cream colored 7 20
Caliche, cream colored to reddish brown 32 52
"Mortar bed" 16 68
Sand, fine to coarse 3 71
"Mortar bed", soft 19 90
Silt, clay, and very fine to fine sand, brown 13 103
Sand, fine to very coarse; contains a few pebbles 17 120
Sand, fine to very coarse; contains silt and clay 10 130
Sand, fine to coarse; contains silt and clay and very coarse sand 10 140
Sand, fine to coarse; contains very coarse sand and a few pebbles 45 185
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow 5 190
Chalk, gray 3 193

16-38-16bb--Sample log of test hole in the NW NW NW sec. 16, T. 16 S., R. 38 W., Wichita County, drilled by State Geological Survey, October 1947. Surface altitude, 3,444.9 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Silt, hard, black 3 3
Silt, hard, light brown 15 18
Tertiary--Pliocene
Ogallala formation
Clay, sandy, light tan 3 21
Silt and fine sand, clayey, calcareous, brown to light tan 8 29
Gravel, coarse to fine, and coarse sand 12 41
Silt and fine sand, clayey, calcareous, brown 15 56
Sand, coarse to medium, and fine to coarse gravel 10 66
Silt and fine sand, clayey, calcareous, light tan 4 70
Silt and fine sand, clayey, light green 10 80
Silt and fine sand, clayey, brown; contains medium to coarse sand 42 122
Sand, medium to coarse, and fine to coarse gravel; contains some clayey light-tan fine sand and silt 8 130
Sand, coarse, and fine to coarse gravel 8 138
Silt and fine sand, plastic, calcareous, yellow brown 2 140
Sand, medium to coarse, and fine to coarse gravel; contains clayey yellow-brown silt and fine sand 10 150
Sand, medium to coarse, and fine to coarse gravel 12 162
Sand, medium to coarse, and fine to medium gravel; contains some clayey yellow-brown silt, and fine sand at 174 to 178 feet 18 180
Sand, fine to coarse, and fine to coarse gravel 10 190
Sand, fine to coarse 16 206
Silt and fine sand, clayey, yellow 1 207
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow 2 209
Chalk, gray 1 210

16-40-24aa--Sample log of test hole in the NE NE NE sec. 24, T. 16 S., R. 40 W., Greeley County, drilled by State Geological Survey, 1947. Surface altitude, 3,592.1 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Silt, dark brown 3 3
Silt, light brown 15 18
Tertiary--Pliocene
Ogallala formation
Caliche, hard, light tan 16 34
Sand, medium to coarse, and fine to coarse gravel 6 40
"Mortar bed"; contains a small amount of caliche and coarse gravel 10 50
"Mortar bed" 10 60
Sand, fine to coarse, and fine to coarse gravel, partly consolidated; contains some tan clay 10 70
Sand, fine to coarse, and fine gravel; contains some brown sandy clay 10 80
Sand, coarse, and fine to coarse gravel; contains gray clay at 87 to 90 feet 10 90
Sand, coarse, and fine to coarse gravel 11 101
Sand, coarse to medium, and fine to coarse gravel; contains tan clay 9 110
Sand, fine, and silt, sticky, clayey; contains some coarse sand and fine to coarse gravel 12 122
Clay, sandy, light tan 8 130
Clay, fine sand, and silt, light tan 8 138
Sand, fine to coarse, and fine gravel; contains a small amount of clay 12 150
Sand, coarse to medium, and fine to medium gravel 10 100
Sand, coarse to medium, and fine to coarse gravel 10 170
Gravel, coarse to fine, and yellow clay 4 174
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, clayey, gray 6 180

16-41-15cc--Sample log of test hole in the SW SW SW sec. 15, T. 16 S., R. 41 W., Greeley County, drilled by State Geological Survey, 1947. Surface altitude, 3,703.9 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Silt, dark brown 2 2
Silt, light brown 12 14
Tertiary--Pliocene
Ogallala formation
Sand, medium to fine; contains a small amount of coarse sand 2 16
Clay and silt, calcareous, tan 4 20
Clay, calcareous, gray 8 28
Sand, medium to coarse 7 35
Clay, calcareous, gray 13 48
Sand, medium to coarse 1 49
Clay, gray 1 50
Clay, gray; contains some coarse sand and fine gravel 6 56
Clay, gray; contains clayey fine sand and silt 4 60
Clay, white to light tan 6 66
Silt and fine sand, clayey, brown 4 70
Silt and fine sand, clayey, light tan; contains some coarse sand 5 75
Silt and fine sand, clayey, brown; contains medium to coarse sand and fine gravel 12 87
Sand, medium to coarse, and fine to coarse gravel 3 90
Silt and fine sand, clayey, brown; contains medium to coarse sand 7 97
Sand, coarse, and fine to medium gravel; contains tan clayey fine sand and silt 3 100
Sand, coarse, and fine to coarse gravel 6 106
Silt and fine sand, clayey; contains medium to coarse sand and fine to coarse gravel 4 110
Sand, coarse, and fine to coarse gravel; contains some clayey silt and fine sand 10 120
Silt and fine sand, plastic, light tan; contains medium to coarse sand and fine gravel 10 130
Silt and fine sand, clayey, light tan; contains some medium to coarse sand 20 150
Sand, fine to coarse, and silt; contains fine gravel 12 162
Clay, hard, calcareous, green 1 163
Sand, fine to coarse, and silt 7 170
Sand, fine to coarse, and fine to medium gravel; contains green to white clay 10 180
Sand, fine to coarse, and fine to medium gravel 10 190
Sand, medium to coarse, and fine gravel 10 200
Sand, coarse, and fine to medium gravel; contains some medium sand 20 220
Sand, fine to coarse 24 244
Sand, coarse, and fine to medium gravel; contains some yellow clay 6 250
Sand, medium to coarse, and fine to coarse gravel 7 257
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow 3 260
Chalk, gray 4 264

16-42-19bb--Sample log of test hole in the NW NW NW sec. 19, T. 16 S., R. 42 W., Greeley County, drilled by State Geological Survey, 1947. Surface altitude, 3,873.8 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Silt, dark brown 1 1
Silt, sandy, hard, light brown 9 10
Tertiary--Pliocene
Ogallala formation
Caliche, hard, sandy; "algal limestone" at top 10 20
Caliche, hard, sandy, gray; contains some gray clay 8 28
"Mortar bed" 60 88
Sand, fine to coarse 6 94
Silt and fine sand, clayey, light tan; contains medium to coarse sand and fine to coarse gravel 16 110
Sand, medium to coarse, and fine to coarse gravel 20 130
Sand, coarse, and fine to coarse gravel; contains clayey silt and fine sand 10 140
Sand, medium to coarse, and fine gravel 10 150
Sand, medium to coarse, and fine to coarse gravel 13 163
Sand, coarse, and fine to medium gravel; contains some light-tan clay and silt 13 176
Clay and silt, light tan; contains some coarse sand and fine to medium gravel 4 180
Silt and fine sand, clayey, light tan; contains some medium sand 30 210
Sand, medium to coarse; contains some fine sand, silt, and fine gravel 10 220
Sand, coarse, and fine to medium gravel 5 225
Sand, medium to coarse, and fine gravel 2 227
Sand, coarse, and fine to medium gravel; contains sandy, yellow-brown clay 3 230
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow brown 7 237
Chalk, blue gray 3 240

T. 13 S. || T. 14 S. || T. 15 S. || T. 16 S. || T. 17 S. || T. 18 S.

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Kansas Geological Survey, Geology
Placed on web Jan. 29, 2013; originally published December 1957.
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