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Thomas County Geohydrology

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Logs and Test Holes and Wells, continued

21. Log of test hole 21 in the SW corner sec. 31, T. 9 S., R. 36 W. Surface altitude, 3,450.2 feet. Thickness,
feet
Depth,
feet
1 Soil, dark gray downward to light gray 3 3
Sanborn formation
1 Silt and very fine sand; yellow-gray 27 30
1 Silt, buff, containing sand and fine gravel 10 40
1 Silt, compact, light gray 10 50
Ogallala formation
1 Silt, gray, containing sand and gravel 9 59
1 Gravel and sand 5 64
1 Silt, pink-tan, containing gravel and sand 23 87
1 Gravel and sand 15 102
1 Silt, sand, and caliche; buff 16 118
1 Gravel, sand, silt, and caliche; yellow-gray 14 132
1 Clay, silt, and caliche; white 12 144
1 Gravel and sand; yellow and gray; containing silt. A few zones are cemented 26 170
1 Silt, sand, and caliche; tan 9 179
1 Gravel and sand; gray; containing silt 23 202
Pierre shale
1 Shale, yellow-green and gray 8 210
1 Shale, dark gray 10 220

22. Log of test hole 22 in the SE corner sec. 17, T. 10 S., R. 36 W. Surface altitude, 3,352.7 feet. Thickness,
feet
Depth,
feet
Sanborn formation
1 Silt and very fine sand; gray to tan 27 27
1 Silt, gray, containing clay, sand, gravel, and caliche 1 28
1 Silt and very fine sand; yellow-gray 1 29
1 Silt with clay; yellow-buff; containing sand, caliche, gravel, and fragments of snails 11 40
Ogallala formation
1 Gravel and sand; partly cemented 26 66
1 Silt, pink-tan, containing sand, gravel, and caliche 12 78
1 Gravel and sand 6 84
1 Silt, sand, and gravel; gray-buff 6 90
1 Gravel and sand 32 122
1 Silt, sand, and gravel; tan 4 126
1 Gravel and sand 10 136
1 Silt, light yellow-gray 2 138
1 Gravel and sand; gray; containing silt 12 150
1 Silt, gray-buff, containing sand, caliche and gravel 10 160
1 Gravel and sand 16 176
Pierre shale
1 Shale, light gray-green 4 180
1 Shale, dark gray 5 185

23. Log of test hole 23 in the NE 1/4 SE 1/4 sec. 20, T. 10 S., R. 36 W. Surface altitude, 3,322.5 feet. Thickness,
feet
Depth,
feet
Sanborn formation
1 Clay and silt; compact; gray 10 10
1 Clay and silt; light gray; containing nodules of caliche and pebbles 16 26
1 Silt and clay; buff; containing gravel and sand 14 40
1 Gravel, sand, and silt; containing abraded pebbles of caliche 16 56
Ogallala formation
1 Gravel, sand, and silt; cemented; buff 4 60
1 Silt, buff; containing sand 6 66
1 Gravel and sand; containing silt 24 90
1 Silt, buff, containing sand and caliche 7 97
1 Gravel and sand 37 134
1 Silt, sand, and caliche; buff 7 141
1 Gravel, sand, silt, clay, and caliche; white 9 150
1 Silt and clay; light buff; containing caliche, sand, and gravel 24 174
1 Gravel and sand 4 178
1 Clay, white, containing silt and sand 7 185
1 Gravel and sand; buff; containing silt and caliche 9 194
Pierre shale
1 Shale, yellow in upper part to light blue-gray in lower part 6 200
1 Shale, dark gray 20 220

24. Log of test hole 24 in the NE 1/4 NE 1/4 sec. 29, T. 10 S., R. 36 W. Surface altitude, 3,365.9 feet. Thickness,
feet
Depth,
feet
1 Soil, light gray-brown 2 2
Sanborn formation
1 Silt and very fine sand; buff 44 46
1 Clay and silt; light gray-green; containing sand and gravel 19 65
1 Gravel and sand; buff; interbedded with silt and pebbles of caliche 17 82
1 Silt, light buff 6 88
Ogallala formation
1 Gravel and sand; cemented in zones 37 125
1 Silt, caliche, sand, and gravel; gray 10 135
1 Gravel and sand 3 138
1 Silt, light gray; containing sand, gravel, and caliche 4 142
1 Gravel and sand 4 146
1 Silt, yellow-gray; containing sand, gravel and caliche 4 150
1 Gravel, sand, and caliche 20 170
1 Silt, gravel, sand, and caliche; yellow-buff 6 176
1 Gravel and sand; containing clay 9 185
1 Silt and caliche; gray; containing sand 2 187
1 Gravel and sand 18 205
1 Silt, light gray; containing sand and caliche 7 212
1 Gravel and sand 11 223
1 Silt, buff; containing gravel, sand, and caliche 9 232
1 Gravel and sand 15 247
Pierre shale
1 Shale, light yellow-green in upper part to gray in lower part 8 255

25. Log of test hole 25 in the SW corner sec. 31, T. 10 S., R. 35 W. Surface altitude, 3,353.4 feet. Thickness,
feet
Depth,
feet
1 Road fill 2 2
Sanborn formation
1 Silt and very fine sand; yellow-gray 15 17
1 Silt, gray-brown to white; containing sand, gravel, and caliche 3 20
Ogallala formation
1 Silt, clay, sand, gravel, and caliche; white 12 32
1 Gravel and sand; cemented 13 45
1 Silt, caliche, sand, and gravel; light brown 10 55
1 Gravel, sand, and caliche 14 69
1 Silt, clay, sand, and caliche; light green-yellow to light brown 29 98
1 Sand, cemented 22 120
1 Gravel and sand 20 140
1 Silt, green and brown; containing sand, caliche and clay 24 164
1 Sand, yellow-brown; containing silt 12 176
1 Silt, clay, sand, and caliche; yellow-brown 11 187
1 Gravel and sand 7 194
1 Clay and silt; yellow-buff and light gray-green 7 201
1 Gravel and sand 14 215
Pierre shale
1 Shale, light gray-green and gray 5 220
1 Shale, gray 10 230

26. Log of test hole 26 in the NW 1/4 NW 1/4 sec. 36, T. 10 S., R. 34 W. Surface altitude, 3,192.6 feet. Thickness,
feet
Depth,
feet
Sanborn formation
1 Silt and very fine sand; yellow-gray 23 23
1 Silt and clay; tan; containing sand and gravel 7 30
1 Silt and clay; light buff 6 36
Ogallala formation
1 Silt, clay, sand, and gravel; buff 6 42
1 Gravel, sand, and caliche; buff 15 57
1 Silt, pink-tan; containing gravel and sand 10 67
1 Gravel and sand 21 88
1 Silt, tan; containing gravel and sand 6 94
1 Gravel and sand 7 101
1 Silt, pink-tan; containing sand and gravel 4 105
1 Gravel, sand, silt, and caliche; tan 5 110
1 Silt and clay; gray; containing gravel, sand and caliche 12 122
1 Sand and gravel 8 130
1 Gravel and sand; containing silt and caliche 17 147
Pierre shale
1 Shale, greenish-gray, mottled yellow-brown and red 11 158
1 Shale, dark gray 7 165

27. Log of test hole 27 in the SE 1/4 SE 1/4 sec. 36, T. 10 S., R. 34 W. Surface altitude, 3,182.6 feet. Thickness,
feet
Depth,
feet
Sanborn formation
1 Clay and silt; compact; gray 6 6
1 Silt and clay; yellow-gray; containing very fine sand 14 20
1 Silt and clay; yellow-gray; containing a small amount of fine gravel 12 32
Ogallala formation
1 Silt, dull tan; containing clay, sand, and gravel 3 35
1 Gravel, sand, silt, and caliche; tan 7 42
1 Silt and clay; tan and gray; containing sand and caliche 16 58
1 Gravel and sand 20 78
1 Silt, tan, containing sand 5 83
1 Gravel, sand, and caliche 5 88
1 Silt and sand; compact; tan 4 92
1 Gravel, sand, silt, and caliche; tan and gray 8 100
1 Silt, sand, and gravel; gray and tan 8 108
1 Gravel, sand, and caliche 29 137
1 Silt, clay, sand, and caliche 10 147
Pierre shale
1 Shale, light green-gray mottled with yellow and brown 8 155

28. Log of test hole 28 in the SE 1/4 SE 1/4 sec. 36, T. 10 S., R. 34 W. Surface altitude, 3,191.2 feet. Thickness,
feet
Depth,
feet
1 Soil, silty, gray 2 2
Sanborn formation
1 Silt and very fine sand; tan-gray 21 23
1 Silt and clay; gray-brown 12 35
1 Silt and clay; tan-buff; containing gravel and caliche 12 47
Ogallala formation
1 Gravel, sand, silt, and caliche; buff 9 56
1 Silt, sand, gravel, and caliche; tan 2 58
1 Gravel and sand; partly cemented 3 61
1 Clay, bentonitic (?), silty, yellow-buff 4 65
1 Silt, tan and gray; containing sand and gravel 9 74
1 Gravel, sand, and caliche; gray and buff 30 104
1 Silt, caliche, and sand; tan to gray 7 111
1 Gravel, sand, and caliche; yellow-gray 19 130
1 Sand, gravel, and clay; yellow-gray 15 145
1 Silt, caliche, and sand; yellow-gray 7 152
1 Gravel 4 156
Pierre shale
1 Shale, light green, mottled yellow 4 160
1 Shale, gray-green and gray 15 175

29. Log of test hole 29 in the SE corner sec. 36, T. 10 S., R. 32 W. Surface altitude, 3,053.8 feet. Thickness,
feet
Depth,
feet
1 Soil, gray-brown to black 3 3
Sanborn formation
1 Silt and very fine sand; yellow-gray 20 23
1 Silt, buff to white; containing clay, fine gravel, and caliche 2 25
Ogallala formation
1 Gravel, sand, and caliche 13 38
1 Silt, pink-tan; containing sand, caliche, and gravel 32 70
1 Gravel and sand 12 82
1 Silt, sand, and caliche; tan 6 88
1 Gravel and sand; buff 6 94
1 Silt, gravel, and sand; buff 21 115
1 Gravel and sand; buff 10 125
1 Silt, sand, and gravel; gray 9 134
1 Gravel and sand 7 141
1 Silt, gravel, and sand 2 143
1 Gravel, sand, and silt; buff 13 156
1 Silt, sand, and gravel, tan 8 164
1 Gravel, sand, and silt; cemented with calcium carbonate; gray 16 180
1 Silt, gravel, sand, and caliche; tan to gray 35 215
Pierre shale
1 Shale, green-gray and yellow 5 220
1 Shale, yellow to light gray-blue 10 230
1 Shale, gray 20 250

30. Log of irrigation well at Colby Experiment Station, in the NE 1/4 sec. 2, T. 8 S., R. 34 W. Thickness,
feet
Depth,
feet
1 Soil 6 6
Sanborn formation
1 Clay, white 30 36
Ogallala formation
1 Sand rock 3 39
1 Sand, fine 10 49
1 Clay, red 52 101
1 Sand (good water sand) 7 108
1 Clay, red 9 117
1 Sand (good water sand) 32 149
1 Clay, red 11 160

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Kansas Geological Survey, Thomas County Geohydrology
Web version Nov. 2001. Original publication date Dec. 1945.
Comments to webadmin@kgs.ku.edu
The URL for this page is http://www.kgs.ku.edu/General/Geology/Thomas/08_logs3.html