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Geohydrology of Sheridan County

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Logs of Test Holes and Wells

The logs of 34 test holes and 1 well in or adjacent to Sheridan County are given on the pages that follow. The test holes were drilled by the State Geological Survey with a hydraulic-rotary drill rig. A system of numbering wells and test holes is described on page 10.

6-25-6ba--Sample log of test hole in the NE NW sec. 6, T. 6 S., R. 25 W.; Graham County, 200 feet south of county line and 15 feet east of road; drilled 1952. Surface altitude, 2,492.9 feet. Thickness,
feet		 Depth,
feet
Road fill 0.5 0.5
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse, silty; cemented with calcium carbonate 6.5 7
Silt, limy, hard, and fine to medium sand 5 12
Silt to fine sand, limy, white 3 15
Clay, sandy, tan-yellow 3 18
Sand, fine to medium, silty, light-tan 3 21
Sand, fine to coarse, silty, green 6 27
Sand and gravel, fine to coarse; contains cemented stringers 6 33
Sand and gravel, cemented with silty caliche 3 36
Clay, sandy, tan-green to gray-green 3 39
Clay, sandy, tan-gray to yellow-gray 7 46
Sand, fine to medium, silty; some coarse sand and fine gravel 8 54
Clay, tan to yellow-gray 2 56
Clay, light-gray 4 60
Clay, very sandy, light-tan 8 68
Sand, fine to medium, clayey, tan-brown 8 76
Clay, sandy, tan-brown 10 86
Clay, tan-brown; contains stringers of sand 15 101
Sand, fine to medium; contains a lens of clay 10 111
Sand, fine to medium, silty 10 121
Sand, fine to medium 6.5 127.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, silicified, very hard, yellow-brown .5 128.0

6-25-31cc--Sample log of test hole in the SW cor. sec. 31, T. 6 S., R. 25 W.; Graham County, 300 feet north and 15 feet east of intersection; drilled 1952. Surface altitude, 2,571.9 feet. Thickness,
feet		 Depth,
feet
Road fill 3 3
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, tan-gray to gray-green; contains snail shells 10 13
Tertiary--Pliocene
Ogallala formation
Sand and gravel, fine to coarse 9 22
Sand, fine to coarse; contains stringers of tan-gray clay 5 27
Clay, sandy, tan-gray 18 45
Sand, cemented, light-tan 14 59
Sand, fine to coarse 4 63
Sand, cemented, clayey 15 78
Clay, sandy, light-gray 15 93
Sand, fine to coarse; limy cemented stringers 15 108
Sand, fine to coarse, clayey, yellow-gray 19 127
Sand, fine to coarse, silty 7 134
Sand, fine to coarse, interbedded stringers of silty clay 5.5 139.5
Sand, clayey, cemented 24.5 164
Clay, compact, yellow; contains thin stringers of sand 6 170
Sand, fine to medium, cemented 20 190
Sand, fine to medium; contains some weathered chalk, cemented 19 209
Sand, fine to coarse; contains fragments of silicified chalk 9 218
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, silicified at top, and yellow to orange chalky shale 21 239

6-27-3aaa--Sample log of test hole in the NE cor. sec. 3, T. 6 S., R. 27 W.; 20 feet east of north-south fence line and 20 feet south of county-line road; drilled 1952. Surface altitude 2,543.2 feet; depth to water, 22.8 feet. Thickness,
feet		 Depth,
feet
Road fill 4 4
Quaternary--Pleistocene
Sanborn formation
Terrace deposits (Wisconsinan Stage)
Clay, compact, brown 18 22
Clay, sandy, tan-brown 10 32
Clay, sandy, dark-brown to gray 6 38
Sand, medium to coarse 17 55
Clay, yellow-tan, and fine to coarse gravel and fragments of chalk 16 71
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, clayey, calcareous, blue-black 3 74

6-27-3aad--Sample log of test hole in the SE NE NE sec. 3, T. 6 S., R. 27 W.; 110 feet north of bridge and 12 feet west of center of road; drilled 1952. Surface altitude 2,529.3 feet; depth to water, 11.7 feet. Thickness,
feet		 Depth,
feet
Road fill 5 5
Quaternary--Pleistocene
Recent alluvium
Sand, fine, silty 3 8
Clay, silty to fine sandy, gray 5 13
Sand, fine to coarse, and fine to coarse gravel 25 38
Sanborn formation
Terrace deposits (Wisconsinan Stage)
Clay and weathered shale, yellow and white 16 54
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, silicified, varicolored 3 57
Chalk, clayey, calcareous, blue-black 3 60

6-27-34dd--Sample log of test hole in the SE cor. sec. 34, T. 6 S., R. 27 W.; 40 feet north and 7 feet west of center of road intersection; drilled 1952. Surface altitude 2,688.2 feet; depth to water, 144.0 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Bignell silt member (Wisconsinan Stage)
Silt, dark-gray to gray 6.5 6.5
Peoria silt member (Wisconsinan Stage)
Clay, compact, silty, tan-brown (Brady soil) 2.5 9
Silt, tan-gray 3 12
Silt, clayey, tan 6 18
Loveland silt member (Illinoian Stage)
Clay, silty and limy, dark-tan 6 24
Clay, compact, tan-yellow 10 34
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse, and fine to coarse gravel; contains some yellow silt 29 63
Clay, sandy, tan-white 12 75
Clay, sandy, gray-white 11 86
Sand, fine to coarse, silty 4 90
Clay, sandy, tan to tan-gray 15 105
Clay, gray, and interbedded streaks of fine to medium sand 13 118
Sand, cemented, limy, white 18 136
Sand, fine to coarse, silty 19 155
Sand, coarse, and fine to coarse gravel, clayey, tan 3 158
Clay, yellow to tan-yellow; contains some fine sand 5 163
Sand, fine to medium, cemented 9 172
Clay, gray-brown 4 176
Sand, fine to medium, silty, brown 12 188
Sand, fine to coarse; contains interbedded tan-brown silty clay 17 205
Sand, fine to medium, silty 37 242
Sand, fine to coarse, and yellow weathered shale 6 248
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, weathered, yellow 2 250
Shale, clayey, blue-black 5 255

6-28-4aa--Sample log of test hole in the NE cor. sec. 4, T. 6 S., R. 28 W.; 35 feet west of road center and 15 feet south of county line; drilled 1952. Surface altitude, 2,768.6 feet; depth to water, 123.0 feet. Thickness,
feet		 Depth,
feet
Soil 1.5 1.5
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, tan-gray to tan-green 9.5 11
Silt, tan-green; contains snail shells 9 20
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse, limy to cemented 5 25
Sand, fine to coarse, silty to cemented 10 35
Sand, fine to coarse, silty, tan 4 39
Sand, fine to coarse, and fine to coarse gravel, silty 23 62
Sand, fine to medium, cemented 8 70
Clay, sandy, light-gray to tan 7 77
Sand, fine to coarse, cemented, silty 14 91
Sand, fine to coarse, and fine to coarse gravel 7 98
Clay, sandy, tan-brown; contains embedded gravel and shale fragments 14 112
Sand, fine to coarse 4 116
Sand, fine to coarse, cemented to clayey, light-tan 12 128
Gravel, fine to medium, limy 4 132
Clay, limy and sandy, gray-white; contains some embedded gravel 6 138
Sand, fine to medium, silty, light-gray 7 145
Sand, and gravel, silty, gray; interbedded stringers of green clay 6 151
Sand, fine to coarse, limy 7 158
Sand and gravel, clayey, yellow; contains cemented sand and gravel 20 178
Sand and gravel, fine to coarse 10 188
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, clayey, weathered, calcareous, yellow to yellow-gray 20 208
Shale, clayey, calcareous, light-gray to black 2 210

6-28-27bb--Sample log of test hole in the NW NW sec. 27, T. 6 S., R. 28 W.; 0.15 mile south of section corner and 30 feet east of center of highway; drilled 1952. Surface altitude 2,660.2 feet; depth to water, 18.0 feet. Thickness,
feet		 Depth,
feet
Soil and road fill 5 5
Quaternary--Pleistocene
Terrace deposits, undifferentiated
Clay, dark-brown 6 11
Clay, dark-brown, compact, blocky (Sangamon soil) 2 13
Silt, tan-brown; contains some sand near base 8 21
Sand and gravel, fine to coarse 17 38
Sand, fine to coarse, and some coarse gravel 8 46
Tertiary--Pliocene
Ogallala formation
Sand, limy, cemented 2 48
Sand, silty, cemented 11 59
Sand, fine to medium; contains some embedded light-tan clay 36 95
Sand, and gravel, fine to coarse, silty 20 115
Sand, fine to coarse, and some coarse gravel, silty 12 127
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Clay to weathered shale, yellow-tan 12 139
Shale, clayey, calcareous, gray 11 150

6-28-33dd--Sample log of test hole in the SE cor. sec. 33, T. 6 S., R. 28 W.; 40 feet west and 25 feet north of center of road intersection; drilled 1952. Surface altitude 2,761.7 feet; depth to water, 125.0 feet. Thickness,
feet		 Depth,
feet
Soil 2 2
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, tan-gray to gray-green; contains fossil snails 22 24
Tertiary--Pliocene
Ogallala formation
Sand and gravel, fine to coarse, cemented, clayey 6 30
Sand, fine to coarse, and fine gravel, silty, tan 9 39
Clay, sandy, tan-brown; contains limy stringers 9 48
Sand, fine to coarse, and fine gravel, silty 5 53
Clay, tan-gray to gray-green; contains some coarse gravel 4 57
Sand, fine to coarse, clayey, cemented 4 61
Sand and gravel, fine to coarse 15 76
Clay, tan; contains interbedded stringers of sand 48 124
Gravel, fine to coarse, clayey 6 130
Sand, clayey, cemented, tan 18 148
Clay, gray-green; contains sandy stringers 4 152
Sand and gravel, fine to coarse; contains yellow-green silt 6 158
Sand and interbedded stringers of tan-white clay 11 169
Sand, very fine to fine, silty, yellow-green 19 188
Sand, fine to coarse 14 202
Sand, fine to coarse, clayey 21 223
Sand, fine to coarse, silty 22 245
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Clay to weathered shale, yellow to yellow-gray 11 256
Shale, clayey, calcareous, dark-gray to black 9 265

6-29-6bb--Sample log of test hole in the NW cor. sec. 6, T. 6 S., R. 29 W.; 200 feet south of county line and 25 feet east of center of road at end of curve; drilled 1952. Surface altitude, 2,789.0 feet; depth to water, 52.8 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, light-tan 4 4
Tertiary--Pliocene
Ogallala formation
Sand and gravel, fine to coarse 1 5
Clay, limy stringers, light-tan 4.5 9.5
Clay, sandy, brown; contains interbedded stringers of medium to coarse sand 7.5 17
Silt to clay, sandy to limy, tan-brown 2.5 19.5
Sand, medium to fine, silty, cemented, brown 7 26.5
Clay, compact, gray-green 2.5 29
Sand and gravel, fine to coarse; contains cemented stringers at 32 to 37 feet 10 39
Clay, tan-brown 4 43
Sand and gravel, fine to coarse, cemented, silty, tan 4 47
Sand and gravel, fine to coarse, silty 7 54
Sand and gravel, fine to coarse, cemented, silty 4.5 58.5
Silt, limy, sandy, light-gray to white 1 59.5
Sand, fine to medium, silty, cemented 1.5 61
Sand and gravel, fine to coarse, limy, silty, cemented 8 69
Clay, sandy, gray 2 71
Sand, fine to medium, silty; contains cemented stringers of sand 4 75
Sand and gravel, fine to coarse; contains interbedded stringers of tan-gray clay 22 97
Clay, limy, light-gray 1 98
Sand and gravel, fine to coarse 5 103
Clay and interbedded stringers of sand 5 108
Sand and gravel, fine to coarse 14 122
Clay, calcareous, tan; contains stringers of sand in lower part 6 128
Cretaceous--Gulfian
Pierre shale
Shale, weathered, bentonitic, yellow to yellow-gray 21 149
Niobrara formation--Smoky Hill chalk member
Shale, clayey, calcareous, dark-gray 1 150

6-29-32ccd--Sample log of test hole in the SE SW SW sec. 32, T. 6 S., R. 29W.; 0.1 mile north of section corner at top of hill, 30 feet east of west right-of-way fence; drilled 1952. Surface altitude, 2,842.3 feet; depth to water, 90.0 feet. Thickness,
feet		 Depth,
feet
Soil 1 1
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, clayey, tan-gray to gray-green 10 11
Silt, clayey, gray-green 8 19
Loveland silt member (Illinoian Stage)
Clay, limy, light-tan 10 29
Tertiary--Pliocene
Ogallala formation
Clay, very limy, gray-white 8 37
Clay, very limy, gray-white; contains some embedded coarse gravel 9 46
Sand and gravel, fine to coarse 9 55
Clay, sandy, tan; contains stringers of fine sand 8 63
Sand and gravel, fine to coarse; contains embedded tan-yellow clay 7 70
Sand, fine to coarse; interbedded stringers of light-tan clay 34 104
Clay, sandy, gray 3 107
Sand, fine to coarse, silty 10 117
Sand, fine to medium; contains embedded tan silty clay 10 127
Sand, fine to coarse, clayey, tan 7 134
Clay, limy to cemented, sandy, light-tan to white 6 140
Sand, fine to medium, limy to cemented 5 145
Clay, compact, tan-yellow 4.5 149.5
Sand, fine to coarse, and fine to medium gravel 14.5 164
Clay, compact, silty to limy; contains stringers of cemented fine sand 6 170
Sand, fine to coarse; contains embedded tan-brown clay 15 185
Cretaceous--Gulfian
Pierre shale
Shale, weathered, silty to clayey, calcareous, yellow to gray-yellow 10 195
Shale, compact, calcareous, gray-yellow 5 200

7-27-35cc--Sample log of test hole in the SW cor. sec. 35 T. 7 S., R. 27 W.; 5 feet north of section line and 15 feet east of center of road; drilled 1952. Surface altitude, 2,642.5 feet; depth to water, 96.2 feet. Thickness,
feet		 Depth,
feet
Road fill 5 5
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, gray-green 11 16
Loveland silt member (Illinoian Stage)
Clay, silty to fine sandy, tan 2.5 18.5
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse, and fine gravel, silty 5.5 24
Sand, fine, clayey to silty, red-brown 15 39
Sand, fine to coarse, silty, tan 11 50
Sand, fine to coarse, clayey, tan; contains stringers of clay 20 70
Sand, fine to coarse, and fine gravel, silty, tan-gray 18 88
Clay, silty to sandy, tan-white 7 95
Sand, fine to coarse, cemented, light-gray 11 106
Sand, fine to coarse, clayey, contains hard cemented stringers at 106 and 107 feet 6 112
Clay, sandy, light-gray 8 120
Sand, fine to medium; contains interbedded stringers of light-tan clay 18 138
Sand, fine to coarse; contains interbedded stringers of brown clay 19 157
Sand, fine to coarse, silty, tan 48 205
Sand and gravel, fine to coarse; contains some weathered yellow chalk 11 216
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Clay to weathered shale, gray-white 2 218
Shale, clayey, calcareous, dark-gray to black 2 220

7-29-32cc--Sample log of test hole in the SW car. sec. 32, T. 7 S., R. 29 W.; 70 feet south and 12 feet east of center of road intersection; drilled 1952. Surface altitude, 2,892.4 feet; depth to water, 120.5 feet. Thickness,
feet		 Depth,
feet
Road fill and soil 3 3
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, gray-green 20 23
Silt, clayey, gray-green to tan-gray 2.5 25.5
Loveland silt member (Illinoian Stage)
Clay, compact, dark-brown (Sangamon Soil) 1 26.5
Clay, limy, light-tan to tan-white 14.5 41
Tertiary--Pliocene
Ogallala formation
Clay, very limy, tan-white 7 48
Caliche to limy clay, tan-white 9 57
Sand and gravel, fine to coarse, limy in lower part 8 65
Sand, fine to coarse, cemented, silty 18 83
Sand and gravel, fine to coarse, clayey 10 93
Sand and gravel, fine to coarse; contains cemented stringers 22 115
Clay, sandy, red to tan 9 124
Sand and gravel, fine to coarse, clayey 3 127
Clay, silty to sandy, tan-gray 15 142
Sand, fine to coarse, silty; contains some fine gravel 22 164
Clay, sandy, gray-green 5 169
Sand, fine to coarse, some fine gravel 10 179
Sand, fine to coarse, silty 20 199
Sand and gravel, fine to coarse; contains embedded tan clay 30 229
Sand, fine to coarse; contains stringers of tan clay at 236 feet 10 239
Sand, fine to coarse, and fine gravel; contains some weathered yellow chalk 22.5 261.5
Cretaceous--Gulfian
Niobrara formation
Chalk, weathered to chalky shale, yellow to yellow-gray 8.5 270.0

8-26-1bb--Sample log of test hole in the NW cor. sec. 1, T. 8 S., R. 26 W.; 20 feet west of east right-of-way fence and 125 feet south of section-line fence; drilled 1952. Surface altitude, 2,537.9 feet. Thickness,
feet		 Depth,
feet
Road fill 4 4
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, gray-green; contains fossil snails 10.5 14.5
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse, and fine to coarse gravel 3.5 18
Sand, fine to coarse, clayey, tan-brown 3 21
Sand, fine to coarse, silty, tan-gray 5 26
Sand and gravel, fine to coarse, cemented 3 29
Clay, limy to cemented, gray-white 4 33
Sand, fine to medium, limy to cemented 6 39
Sand, fine to medium, clayey, brown 5 44
Sand and gravel, fine to coarse, silty, yellow-brown 10 54
Sand, fine to medium, limy to cemented 12 66
Clay, light-tan, and interbedded stringers of sand 4 70
Sand, fine to medium, and interbedded stringers of light-gray clay 18 88
Sand, fine to coarse 2 90
Sand, fine to coarse, silty, cemented 5 95
Sand, fine to coarse, silty to clayey 25 120
Sand, fine to medium 20 140
Sand and gravel, fine to coarse 10 150
Sand and gravel, fine to coarse; contains some weathered yellow-white chalk 10 160
Gravel, fine to coarse; contains some weathered white and yellow chalk 3 163
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, weathered, yellow-orange 35 198
Shale, clayey, calcareous, dark-gray to black 2 200

8-26-13cc--Sample log of test hole in the SW cor. sec. 13, T. 8 S., R. 26 W.; 15 feet east of center of road and 40 feet north of railroad; drilled 1952. Surface altitude, 2,387.0 feet; depth to water, 10.1 feet. Thickness,
feet		 Depth,
feet
Road fill 2 2
Quaternary--Pleistocene
Recent alluvium
Sand, fine to coarse, silty 4 6
Sand, fine to coarse; some fine to coarse gravel 23 29
Sanborn formation
Terrace deposits (Wisconsinan Stage)
Sand and gravel, fine to medium; contains embedded dark-gray to black silt 10 39
Sand and gravel, fine to medium; contains much dark-gray silt 10 49
Sand and gravel, fine to coarse, silty; contains stringers of light-gray clay at 55 and 65 feet 18 67
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, blocky, dark-gray 3 70

8-26-35dd--Sample log of test hole in the SE cor. sec. 35, T. 8 S., R. 26 W.; 10 feet north and 30 feet west of center of road intersection; drilled 1952. Surface altitude, 2,501.0 feet. Thickness,
feet		 Depth,
feet
Road fill 1 1
Quaternary--Pleistocene
Undifferentiated valley deposits
Sand, fine to medium, silty, red-brown 6 7
Clay, sandy, tan-gray 2 9
Sand, fine to coarse, and fine to coarse gravel, silty, red 10 19
Tertiary--Pliocene
Ogallala formation
Sand and gravel, fine to coarse 9 28
Clay, blocky, yellow-tan 11 39
Sand and gravel, fine to coarse; contains interbedded thin stringers of gray clay 10 49
Sand and gravel, fine to coarse; contains a few pebbles of silicified chalk 7 56
Clay, compact, light-gray 13 69
Sand, fine to medium, silty 5 74
Clay, gray; contains interbedded stringers of fine to medium sand 3 77
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Clay to weathered shale, orange-yellow 10 87
Clay to weathered shale, silty, yellow 11.5 98.5
Shale, silty to clayey, calcareous, dark-gray 4.5 103

8-27-22ad--Sample log of test hole in the SE NE sec. 22, T. 8 S., R. 27 W.; 15 feet west of road center and 350 feet north of ridge, 25 feet south of private drive; drilled 1952. Surface altitude, 2,503.9 feet; depth to water, 12.0 feet. Thickness,
feet		 Depth,
feet
Quaternary--Pleistocene
Alluvium
Sand and gravel, fine to coarse; silty at top 10 10
Sand and gravel 5 15
Sanborn formation
Terrace deposits (Wisconsinan Stage)
Sand, fine to coarse, silty to clayey; contains stringers of light-gray clay 20 35
Gravel, coarse; contains stringers of light-gray clay at 39 feet 11 46
Clay, compact, yellow-gray; contains interbedded dark-gray clay and gravel 11 57
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, blocky, calcareous, dark-gray 5 62

8-27-35cc--Sample log of test hole in the SW cor. sec. 35, T. 8 S., R. 27 W.; 19 feet east of center of road and 25 feet north of fence tine; drilled 1952. Surface altitude, 2,672.0 feet; depth to water, 110.0 feet. Thickness,
feet		 Depth,
feet
Road fill 3 3
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, clay, black (Brady soil) 3 6
Silt, tan-gray to gray-green; contains fossil snails 13 19
Tertiary--Pliocene
Ogallala formation
Clay, compact, sandy, tan 9.5 28.5
Sand, fine to medium 1.5 30
Clay, sandy, tan to tan-brown 10 40
Sand, fine to coarse, clayey at top 6 46
Sand, fine to coarse, cemented; contains a few tan-gray clay stringers 9 55
Clay, sandy, tan-brown 6 61
Silt, clayey, tan 3 64
Clay, very sandy, tan-brown 3 67
Sand, fine to coarse, silty; contains some gravel 9 76
Clay, compact, light-gray; contains thin stringers of fine and medium sand 4 80
Clay, sandy, light-tan 9 89
Sand, fine to coarse, silty; contains cemented stringers 10 99
Sand, fine to coarse, silty; contains stringers of gray clay, interbedded 8 107
Clay, sandy, gray to tan-gray 7 114
Clay, sandy, tan 2 116
Clay, compact, limy, fine-sandy, light-tan to tan-white 2 118
Clay, sandy, tan-brown; contains interbedded stringers of fine sand 7 125
Clay, compact, tan-yellow 11 136
Sand, fine to medium, clayey, light-tan 8 144
Sand, fine to coarse 2 146
Sand, fine to coarse, cemented, light-tan 9.5 155.5
Gravel, fine to medium; contains interbedded stringers of yellow-gray clay 3.5 159
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow-orange to white 10 169

8-28-3bb--Sample log of test hole in the NW cor. sec. 3, T. 8 S., R. 28 W.; 18 feet south and 50 feet east of center of intersection in private drive; drilled 1952. Surface altitude, 2,771.4 feet; depth to water, 132.6 feet. Thickness,
feet		 Depth,
feet
Soil and road fill 1.5 1.5
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Clay, compact, blocky, tan-gray (Brady soil) 2.5 4
Silt, gray-green; contains fossil snails 21 25
Loveland silt member (Illinoian Stage)
Clay, silty, blocky, tan-brown (Sangamon soil) 3 28
Clay, silty, tan 2 30
Tertiary--Pliocene
Ogallala formation
Clay, very sandy, tan 3 33
Sand, fine to medium, clayey, tan-brown 17 50
Sand, fine to coarse 5 55
Clay, tan-gray 4 59
Sand, silty, fine to medium 3 62
Sand and gravel, clayey 4 66
Sand, fine to coarse, clayey, tan-brown 14 80
Sand, fine to coarse 12 92
Clay, sandy, tan 5 97
Sand, fine to medium 10 107
Sand, fine to coarse; contains interbedded stringers of tan clay 25 132
Sand, fine to coarse; contains some fine gravel 8 140
Sand, fine to coarse, clayey 8 148
Gravel, fine to coarse; cemented with caliche 9 157
Sand, fine to coarse; contains interbedded sandy gray clay 21 178
Sand, fine to coarse; contains hard cemented stringers 8 186
Sand, fine to coarse, clayey to cemented 10 196
Sand, fine to coarse, silty 14 210
Sand and gravel, fine to coarse 20 230
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, weathered, gray-white 3 233
Shale, clayey, calcareous, black to blue-black 3 236

8-28-9ab--Driller's log of A. M. Shatzell irrigation well in the NW NE sec. 9, T. 8 S., R. 28 W.; drilled 1952. Depth to water, 119.3 feet. Thickness,
feet		 Depth,
feet
Soil 1 1
Quaternary--Pleistocene
Sanborn formation
Silt and clay, yellow 24 25
Tertiary--Pliocene
Ogallala formation
Sand, (mortar bed at 65 feet) 47 72
Gravel, coarse 5 77
Gravel, fine to medium 15 92
Clay 6 98
Gravel, fine 8 106
Clay 1 107
Mortar bed 1 108
Gravel, medium-coarse 4 112
Clay 2 114
Gravel, medium-coarse 20 134
Clay 2 136
Gravel, medium to coarse 8 144
Clay 6 150
Clay and gravel 5 155
Gravel, medium to coarse, and streaks of mortar bed 20 175
Clay, red, sandy and gravelly 5 180
Gravel, fine 4 184
Clay and gravel 8 192
Gravel, medium to coarse 16 208
Clay, white, compact 4 212
Clay and gravel streaks 11 223
Gravel, medium to coarse 5 228
Clay 5 233
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, black 5 238

8-28-33dd--Sample log of test hole in the SE cor. sec. 33, T. 8 S., R. 28 W.; 11 feet north and 300 feet west of center of road intersection at top of hill; drilled 1952. Surface altitude, 2,692.2 feet; depth to water, 56.6 feet. Thickness,
feet		 Depth,
feet
Road fill 1.5 1.5
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, tan-gray 11.5 13
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse 5 18
Sand, fine to medium, clayey to cemented 5 23
Sand, fine to coarse, silty, tan-brown 10 33
Sand, fine to coarse, silty; contains some fine to coarse gravel 3 36
Clay, sandy, gray-brown 4 40
Sand, fine to coarse; contains interbedded stringers of gray clay 5 45
Clay, compact, dark-brown 2 47
Clay, compact, gray-green; contains thin stringers of fine sand 14 61
Clay, dark-gray; contains interbedded stringers of sand 7 68
Sand, fine to coarse 10 78
Sand fine to coarse, and fine to coarse gravel 10 88
Sand: fine to coarse, cemented to clayey 9 97
Clay, sandy, yellow-green; contains interbedded stringers of sand 6 103
Sand, fine to medium, clayey 11 114
Sand, fine to coarse; contains some fine to coarse gravel and interbedded stringers of light-gray clay 10 124
Sand and gravel, fine to coarse; contains a few weathered fragments of chalk 4.5 128.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, yellow-orange 1.5 130

8-29-31dd--Sample log of test hole in the SE cor. sec. 31, T. 8 S., R. 29 W.; 70 feet west and 12 feet north of center of road intersection; drilled 1952. Surface altitude, 2,876.7 feet; depth to water, 104.2 feet. Thickness,
feet		 Depth,
feet
Road fill 2 2
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, gray-green to tan-gray 16.5 18.5
Loveland silt member (Illinoian Stage)
Clay, limy, compact, light-tan 15.5 34
Tertiary--Pliocene
Ogallala formation
Sand to silty sandy caliche, light-gray to tan-white 14 48
Sand and gravel, coarse to fine; contains interbedded stringers of silty caliche 13 61
Clay, sandy, tan-brown; contains thin stringers of partly cemented gravel 13 74
Clay, sandy, tan-brown 6 80
Sand and gravel, fine to coarse; clayey to silty, limy, tan-white 10 90
Sand and gravel, coarse to fine; contains cemented stringers 5 95
Clay, sandy, red-brown 2 97
Clay, sandy to compact, light-gray 2.5 99.5
Sand and gravel, fine to coarse, clayey 3 102.5
Clay, compact, tan-yellow 3.5 106
Clay, sandy, tan-gray 3 109
Clay, sandy, red-brown 7 116
Clay, limy, gray-brown; contains some fine to coarse gravel 4 120
Clay, silty, limy, gray 8.5 128.5
Sand and gravel, coarse to fine; contains embedded red-brown clay 4.5 133
Clay, silty, limy, gray to tan-gray; contains stringers of sandy clay 6 139
Clay, red-brown, grading downward to very sandy clay 17 156
Clay, silty, sandy, gray 9 165
Clay, silty, limy, light-gray to white; contains some embedded gravel 11 176
Sand, fine to coarse, clayey, gray 17 193
Clay, sandy, silty, tan-brown 8 201
Sand, fine to medium, cemented, silty, limy 6 207
Caliche, fine-crystalline, hard 6.5 213.5
Cretaceous--Gulfian
Pierre shale
Shale, bentonitic, yellow-tan to yellow-gray 5.5 220

9-26-23aa--Sample log of test hole in the NE cor. sec. 23, T. 9 S., R. 26 W.; 13 feet west and 50 feet south of center of road intersection; drilled 1952. Surface altitude, 2,656.0 feet; depth to water, 140.0 feet. Thickness,
feet		 Depth,
feet
Road fill and soil 4.5 4.5
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Clay, silty, tan-gray 1.5 6
Silt, tan-gray to gray-green 13 19
Tertiary--Pliocene
Ogallala formation
Silt to limy clay, sandy, white 3 22
Sand, fine to coarse, cemented, tan-white 4 26
Sand and gravel, fine to coarse 4 30
Sand, fine to coarse, cemented, tan-brown 4 34
Sand, fine to medium, clayey, tan-brown 4 38
Sand, fine to coarse, some fine to coarse gravel, and thin interbedded stringers of silty clay 16 54
Sand, fine to coarse, clayey to cemented, tan-brown 5 59
Sand, fine to medium; cemented; contains embedded light-gray, limy clay 9 68
Sand, fine to medium, clayey, tan-brown 7 75
Silt, sandy, cemented, tan-brown 10 85
Sand, fine to medium, very clayey, tan-brown 9 94
Clay, sandy, gray 7 101
Sand and clay, interbedded, hard, cemented, gray 8 109
Sand, fine to coarse, silty 15 124
Clay, sandy, gray to tan-gray 13 137
Sand, fine to coarse; contains a lens of tan-brown clay 12 149
Sand, fine to coarse, silty 8 157
Sand, fine to coarse, cemented 6 163
Clay, sandy, light-tan to tan-white 7 170
Sand, fine to coarse, cemented 7 177
Sand, fine to coarse, and some clayey fine gravel, gray 15.5 192.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Clay to weathered shale, yellow to light-gray 2.5 195
Shale, clayey, calcareous, black 3 198

9-26-35dd--Sample log of test hole in the SE cor. sec. 35, T. 9 S., R. 26 W.; 10 feet north and 70 feet west of center of road intersection; drilled 1952. Surface altitude, 2,560.0 feet; del)th to water, 45.4 feet. Thickness,
feet		 Depth,
feet
Road fill 4 4
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Clay, silty, gray-tan 1.5 5.5
Clay, silty to very silty, tan to tan-gray 2.5 8
Clay, tan-brown to brown 2 10
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse, and fine to medium gravel, silty 2 12
Clay, sandy, tan-brown 2 14
Sand, fine to coarse, and fine to coarse gravel 4.5 18.5
Clay, sandy to very sandy, tan 4.5 23
Clay, compact to blocky, tan-gray 6 29
Sand, fine to coarse, silty, yellow-brown 5 34
Clay, tan-brown 2 36
Sand, fine to coarse 2 38
Clay, silty to sandy, mottled brown and green 6 44
Sand, fine to coarse, and interbedded stringers of tan-brown clay 3 47
Sand and gravel, fine to coarse; contains a few lenses of gray sandy clay 12 59
Clay, sandy, light-brown 4 63
Sand, fine to coarse 2 65
Clay, sandy, light-brown 4 69
Silty limestone, sandy; contains some embedded fine gravel 1 70
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, silicified, yellow-brown 2 72
Shale, yellow 8 80

9-28-34cc--Sample log of test hole in the SW cor. sec. 34, T. 9 S., R. 28 W.; 30 feet north of center of section-line road and 15 feet west of power line; drilled 1952. Surface altitude, 2,766.3 feet; depth to water, 87.8 feet. Thickness,
feet		 Depth,
feet
Soil, dark-brown 1.5 1.5
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, clayey, tan-gray 9.5 11
Clay, silty, tan 6 17
Loveland silt member (Illinoian Stage)
Clay, compact, dark-brown 2 19
Clay, compact, limy, tan to tan-white 7 26
Tertiary--Pliocene
Ogallala formation
Clay, sandy to very sandy, tan 5 31
Sand, fine to coarse, and fine gravel; silty, tan 13 44
Clay, silty, tan-gray 4 48
Clay, very sandy, tan-brown 2 50
Clay, compact, sandy, light-tan 6 56
Sand and gravel, fine to coarse, cemented to clayey, tan-brown 4 60
Clay, sandy, gray-brown 4 64
Clay, sandy to very sandy, red-brown 13 77
Sand, fine to medium, clayey to cemented 1.5 78.5
Sand, fine to coarse, and fine to coarse gravel 6.5 85
Clay, sandy to very sandy, red-brown 11 96
Sand, fine to medium, cemented 7 103
Clay, sandy, tan-brown 3.5 106.5
Sand, fine to coarse, and fine gravel 6.5 113
Clay, sandy, compact, tan-brown 6 119
Sand and gravel, fine to coarse 19 138
Clay, tan; contains stringers of fine sand 8 146
Sand, fine to coarse, and fine to medium gravel 17 163
Cretaceous--Gulfian
Pierre shale
Shale, noncalcareous, bentonitic, yellow-gray and gray-white 7 170

9-29-31dd--Sample log of test hole in the SE cor. sec. 31, T. 9 S., R. 29 W.; 100 feet west and 12 feet north of road intersection; drilled 1952. Surface altitude, 2,866.6 feet; depth to water, 86.2 feet. Thickness,
feet		 Depth,
feet
Soil 1 1
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, gray-green to gray-tan 15.5 16.5
Loveland silt member (Illinoian Stage)
Clay, compact to silty, brown 3 19.5
Clay, limy, compact, tan to light-tan 7.5 27
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse, and fine gravel 1.5 28.5
Sand and gravel, fine to coarse, silty, limy, cemented, 3.5 32
Sand and gravel, fine to coarse, clayey 10 42
Sand and gravel, fine to coarse; contains a few streaks of cemented fine to medium sand 9 51
Clay, sandy, tan-red 4 55
Clay, tan-red; contains interbedded streaks of tan-red sandy clay 3 58
Clay, sandy, tan-gray; contains limy streaks 4 62
Sand and gravel, fine to coarse; contains interbedded stringers of tan-gray clay 6 68
Clay, compact, gray 3 71
Clay, sandy, tan-red 3 74
Sand, fine to coarse, and fine gravel 4 78
Clay, limy to sandy, light-tan 8 86
Sand, fine to coarse, and fine gravel 3 89
Clay, sandy to limy; contains a few thin stringers of fine sand 10 99
Clay, compact, yellow-tan 1.5 100.5
Clay, very sandy, tan-bromm 3.5 104
Clay, tan, very sandy; contains interbedded stringers of light-green clay 8.5 112.5
Sand, fine to coarse 4.5 117
Clay, sandy, red-brown 11 128
Sand, fine to medium, cemented to silty 21 149
Cretaceous--Gulfian
Pierre shale
Shale, weathered, bentonitic, yellow-gray 10 159
Shale, clayey, calcareous, dark-gray to black 4 163

10-26-35ad--Sample log of test hole in the SE NE sec. 35, T. 10 S., R. 26 W.; 12 feet west of center of road near entrance to field on west side of road; drilled 1952. Surface altitude, 2,487.6 feet; depth to water, 37.6 feet. Thickness,
feet		 Depth,
feet
Road fill 3.5 3.5
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Clay, tan-gray to tan 3 6.5
Silt, gray-green; contains fossil snails 3.5 10
Clay, compact, silty, tan 3 13
Loveland silt member (Illinoian Stage)
Silt, brown 3.5 16.5
Crete sand and gravel member
Sand, fine to medium, silty, tan-brown 4.5 21
Sand and gravel, fine to coarse 10 31
Sand and gravel, fine to coarse; contains a few fragments of weathered chalk 15 46
Sand and gravel; contains stringers of silt at 55 and 58 feet 14 60
Clay, sandy, gray; contains some embedded gravel 7 67
Sand, fine to medium 4 71
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, dark-gray 4 75

10-26-35dad--Sample log of test hole in the SE NE SE sec. 35, T. 10 S., R. 26 W.; 12 feet west of center of road and 20 feet north of fence corner on east side of road; drilled 1952. Surface altitude, 2,466.6 feet; depth to water, 18.8 feet. Thickness,
feet		 Depth,
feet
Road fill 8 8
Quaternary--Pleistocene
Sanborn formation
Terrace deposits (Wisconsinan Stage)
Clay, silty, tan-brown 7 15
Sand, fine to coarse, silty 4 19
Clay, fine, sandy, dark-gray 10 29
Sand, fine to medium, silty 9 38
Clay, compact, blue-black; contains some embedded medium sand 17 55
Sand and gravel, silty 1 56
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, blocky, dark-gray 4 60

10-26-35dd--Sample log of test hole in the SE cor. sec. 35, T. 10 S., R. 26 W.; 40 feet west of center of road and 40 feet south of private road to east on terrace flat; drilled 1952. Surface altitude, 2,467.4 feet; depth to water, 19.8 feet. Thickness,
feet		 Depth,
feet
Soil 5 5
Quaternary--Pleistocene
Sanborn formation
Terrace deposits (Wisconsinan Stage)
Clay, silty, tan-brown 6 11
Clay, compact, brown to gray-brown 6 17
Clay, compact, tan-brown 4 21
Clay, silty to sandy, gray-brown; contains some embedded fine to coarse gravel 14 35
Clay, silty, blocky, light-brown 7 42
Clay, sandy, blue-black 3 45
Sand, fine to coarse, clayey, black; contains fossil clam shells 7 52
Sand and gravel, fine to coarse 3.5 55.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Shale, dark-gray 3.5 59

10-26-36bab--Sample log of test hole in the NW NE NW sec. 36, T. 10 S., R. 26 W.; 15 feet south of center of road and 0.3 mile east of section corner; drilled 1952. Surface altitude, 2,500.4 feet; depth to water, 41.3 feet. Thickness,
feet		 Depth,
feet
Soil 1.5 1.5
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, tan-gray 9.5 11
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse, and some fine to coarse gravel; silty, loosely cemented 6 17
Sand and gravel, fine to coarse, and a few pebbles; contains a cemented stringer at 23 feet 14 31
Sand and gravel, fine to coarse, limy to cemented 7 38
Sand and gravel, fine to coarse 7 45
Sand and gravel, fine to coarse, partly cemented 8 53
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow 1 54
Shale, dark-gray 6 60

10-27-2bb--Sample log of test hole in the NW cor. sec. 2, T. 10 S., R. 27 W.; 50 feet south and 28 feet east of center of intersection; drilled 1952. Surface altitude, 2,650.4 feet, depth to water, 48.2 feet. Thickness,
feet		 Depth,
feet
Soil 5 5
Tertiary--Pliocene
Ogallala formation
Sand and gravel, fine to coarse, silty, red-brown 10 15
Clay, silty, light-tan 2 17
Clay, very sandy, partly cemented, gray 5 22
Sand, fine to coarse, cemented to clayey 9 31
Sand, fine to coarse, clayey, red-brown 6 37
Clay, sandy, red-brown 12 49
Clay; contains interbedded stringers of tan-brown and gray-green clay 19 68
Sand, fine to coarse, silty 18 86
Clay, sandy to very sandy, tan-brown 3 89
Sand, fine to medium, limy, clayey to cemented, light-tan 18 107
Sand, fine to coarse 3 110
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, clayey, yellow-orange 4.5 114.5
Chalk, silicified, very hard 0.1 114.6

10-27-34dd--Sample log of test hole in the SE cor. sec. 34, T. 10 S., R. 27 W.; 6 feet west and 80 feet north of center of road intersection; drilled 1952. Surface altitude, 2,672.8 feet; depth to water, 71.8 feet. Thickness,
feet		 Depth,
feet
Soil 1.5 1.5
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, tan-gray 8.5 10
Silt, tan to brown 2 12
Loveland silt member (Illinoian Stage)
Clay, dark-brown (Sangamon soil) 3 15
Clay, limy, light-tan 3 18
Tertiary--Pliocene
Ogallala formation
Sand, fine to coarse, clayey, tan-brown 8 26
Sand, fine to coarse, silty 2 28
Clay, very sandy, tan-brown; contains some embedded fine to medium gravel 9 37
Sand, fine to coarse 2 39
Clay, sandy, tan-brown 5 44
Sand and gravel, fine to coarse; contains cemented stringers 15 59
Clay, sandy to very sandy, light-tan 15 74
Sand and gravel, fine to medium, silty 2 76
Clay, sandy, limy, light-tan 3 79
Sand, fine to medium, silty to cemented 2 81
Clay, very sandy, brown 10 91
Clay, tan-brown; contains interbedded stringers of sandy clay 8 99
Clay, tan-brown; contains interbedded stringers of sand, gravel, and chalk fragments 4 103
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, weathered, white 3 106
Chalk, silicified, brown, white and yellow 2 108

10-28-21dd--Sample log of test hole in the SE cor. sec. 21, T. 10 S., R. 28 W.; on north-south fence line 50 feet west of center of highway and 80 feet north of fence comer; drilled 1952. Surface altitude, 2,676.2 feet; depth to water, 21.9 feet. Thickness,
feet		 Depth,
feet
Soil 2 2
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Clay, compact, blocky, gray-brown 1.5 3.5
Silt, tan-gray; contains snail shells 14.5 18
Loveland silt and Crete sand and gravel members (Illinoian Stage)
Clay, silty, tan-gray 2 20
Clay, silty to sandy, brown 2 22
Sand, fine to coarse, clayey to silty, tan-gray to yellow-brown 4 26
Clay, compact, and some embedded tan-gray gravel 6 32
Sand, fine to coarse, clayey 3 35
Clay, silty to fine sandy, tan 2 37
Tertiary--Pliocene
Ogallala formation
Clay, limy, partly cemented, light-tan 4 41
Sand and gravel, coarse to fine, silty 3 44
Clay, silty to limy, light-gray to tan-white 10 54
Clay, limy, tan-white; contains interbedded stringers of sand 4 58
Sand, fine to medium 4 62
Sand, fine to medium, silty, cemented, light-tan 7 69
Clay, compact, tan-yellow 5 74
Clay, compact, gray-white to white 5.5 79.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow to yerow-orange 2.5 82

10-28-33dd--Sample log of test hole in the SE cor. sec. 33, T. 10 S., R. 28 W.; at county line on north road shoulder, 170 feet west of center of highway; drilled 1952. Surface altitude, 2,741.2 feet; depth to water, 61.6 feet. Thickness,
feet		 Depth,
feet
Road fill 1 1
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, clayey, tan-gray 5 6
Tertiary--Pliocene
Ogallala formation
Sand, clayey, red-brown 3.5 9.5
Clay, limy, tan to white 1.5 11
Sand and gravel, coarse to fine, silty 11 22
Sand, coarse to fine; contains some coarse to fine gravel, cemented, silty, tan-brown 5 27
Sand, fine to coarse 5 32
Sand, fine to coarse, and fine to coarse gravel; contains interbedded stringers of sandy clay 6 38
Clay, mottled gray-brown; contains some embedded gravel 9 47
Clay, sandy to very sandy, red-brown 3 50
Sand, fine to coarse 5 55
Clay, sandy, brown; contains some embedded gravel 9.5 64.5
Sand, fine to coarse; contains some fine to coarse gravel 7.5 72
Clay, gray; contains interbedded coarse to fine sand and gravel 6 78
Sand, fine to coarse 5 83
Clay, gray, and interbedded fine to coarse sand 7 90
Sand and gravel, fine to coarse 8 98
Sand and gravel, fine to coarse, clayey 2 100
Clay, tan-gray, and interbedded fine to coarse sand and gravel 6.5 106.5
Cretaceous--Gulfian
Niobrara formation--Smoky Hill chalk member
Chalk, yellow-orange; silicified at top 6.5 113

10-30-31cc--Sample log of test hole in the SW cor. sec. 31, T. 10 S., R. 30 W.; 60 feet north of county line and 5 feet east of right-of-way fence on east side of road; drilled 1952. Surface altitude, 2,924.6 feet; depth to water, 52.4 feet. Thickness,
feet		 Depth,
feet
Soil 1 1
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, tan-gray 9 10
Tertiary--Pliocene
Ogallala formation
Sand and gravel, coarse to fine, cemented, silty, red-brown 8.5 18.5
Sand and gravel, fine to coarse 10.5 29
Clay, sandy to very sandy, light-tan 7 36
Silt, very limy, sandy, white 1 37
Clay, sandy, tan to tan-brown; contains some embedded gravel 18 55
Sand, fine to coarse; contains some fine to coarse gravel 31.5 86.5
Clay, compact, brown 4.5 91
Sand, silty to clayey 20 111
Sand and gravel, fine to coarse 12 123
Cretaceous--Gulfian
Pierre shale
Shale, bentonitic, gray-white 9 132
Shale, yellow to orange 6 138

11-30-1aa--Sample log of test hole in the NE cor. sec. 1, T. 11 S., R. 30 W.; Gove County, 200 feet south and 15 feet west of center of road intersection; drilled 1952. Surface altitude, 2,889.5 feet; depth to water, 112.5 feet. Thickness,
feet		 Depth,
feet
Soil 1 1
Quaternary--Pleistocene
Sanborn formation
Peoria silt member (Wisconsinan Stage)
Silt, clayey, gray-green 10 11
Loveland silt member (Illinoian Stage)
Clay, compact to fine sandy, tan 6 17
Clay, limy, compact, light-tan 2.5 19.5
Tertiary--Pliocene
Ogallala formation
Clay, silty to fine sandy, tan-white; contains some embedded gravel 4.5 24
Clay, silty, tan-brown 2 26
Clay, silty, limy, tan-white 2 28
Gravel, coarse to fine, and coarse sand; cemented 2 30
Sand, medium to coarse, and fine to coarse gravel; contains interbedded tan-brown sandy clay 2 32
Sand and gravel, fine to coarse 16 48
Sand and gravel, fine to coarse; contains some embedded gray clay 3 51
Clay, very sandy, red-brown; contains stringers of gravel at 55 and 58 feet 11 62
Clay, fine, sandy, red-brown 3 65
Clay, red-brown, and interbedded fine to coarse sand 10 75
Sand, medium to coarse, and fine to coarse gravel 23 98
Clay, compact, gray-brown 1.5 99.5
Clay, sandy, red-brown 3.5 103
Clay, silty to sandy, limy, tan-brown 5 108
Sand, medium to coarse, and fine to medium gravel 5 113
Clay, sandy, gray-brown 8 121
Sand, fine to coarse 17 138
Clay, gray-brown, limy 8 146
Clay, gray-brown; contains interbedded stringers of sand 10 156
Silt, very limy, tan-white 7 163
Cretaceous--Gulfian
Pierre shale
Shale, weathered, mottled yellow-brown 3 166
Shale, bentonitic, yellow-gray 11 177
Shale, clayey, dark-gray 10 187
Niobrara formation--Smoky Hill chalk member
Shale, calcareous, dark-gray 23 210

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Kansas Geological Survey, Geology
Placed on web Feb. 10, 2009; originally published May 1956.
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The URL for this page is http://www.kgs.ku.edu/General/Geology/Sheridan/07_logs.html