KGS--Thomas County--Logs and Test Holes and Wells

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Well Logs

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Logs and Test Holes and Wells

Listed in the following pages are logs of 29 test holes and one irrigation well in Thomas County. The test holes were drilled by the State and Federal Geological Surveys during 1943 and 1944. Samples of the material penetrated by the test holes were examined in the field by Nick Fent, who supervised the drilling and prepared logs of the holes. The samples were subsequently studied microscopically by me and the descriptions in the logs were changed where necessary. The log and data concerning the irrigation well at the Colby Agricultural Experiment Station were supplied by George S. Knapp and Embert Coles. Samples obtained from the test holes are on file for general use in the offices of the State Geological Survey at the University of Kansas in Lawrence. The locations of the test holes within the county are shown in figure 13.

1. Log of test hole 1 in the NW corner sec. 6, T. 6 S., R. 31 W. Surface altitude, 2,997.9 feet. Thickness,
feet Depth,
feet

Road fill 3 3

Sanborn formation

Silt and very fine sand; yellow-gray; containing abundant snails 20 23

Silt, clay, and sand; light buff to brown 11 34

Ogallala formation

Gravel, sand, and silt; buff and gray; partly cemented by calcium carbonate 23 57

Silt and sand; pink-tan 7 64

Gravel and sand 21 85

Silt, sand, and caliche; gray and buff 27 112

Gravel and sand 6 118

Silt, sand, and caliche; grading downward into silt, clay, and caliche; gray 31 149

Sand, becoming coarser downward and containing some clay at base 37 186

Pierre shale

Shale, dark gray 14 200

2. Log of test hole 2 in the NW corner sec. 6, T. 6 S., R.33 W. Surface altitude, 3,159.0 feet. Thickness,
feet Depth,
feet

Sanborn formation

Silt, containing admixtures of fine sand and clay in some zones and some nodules of caliche; tan to gray; containing abundant snails 33 33

Silt, sand, and caliche; gray-white 7 40

Ogallala formation

Silt, sand, and gravel; buff; partly cemented by calcium carbonate 10 50

Gravel and sand; gray-buff to brown; containing some zones cemented by calcium carbonate 54 104

Silt and caliche; pink-tan; containing some clay and sand 18 122

Gravel, medium to fine, and sand; containing some silt 8 130

Silt, sand, gravel, and caliche; gray to tan 30 160

Gravel and sand; cemented by calcium carbonate; gray to brown 9 69

Caliche, clay, and silt; containing some sand; light tan to white 25 194

Gravel, fine, and sand 11 205

Silt, clay, sand, and gravel 3 208

Pierre shale

Shale, light blue-gray mottled with yellow-brown 2 210

Shale, blue-gray 5 215

3. Log of test hole 3 in the NW corner sec. 6, T. 6 S., R. 35 W. Surface altitude, 3,330.2 feet. Thickness,
feet Depth,
feet

Sanborn formation

Silt, yellow-gray; containing abundant snails 50 50

Ogallala formation

Silt, caliche, sand, and gravel; tan 29 79

Gravel and sand 21 100

Silt, caliche, sand, and gravel; buff 23 123

Gravel, sand, and caliche 34 157

Silt, caliche, sand, and gravel 53 210

Sand, medium to fine, loosely cemented with calcium carbonate 20 230

Silt and sand; containing caliche, gray 9 239

Sand, medium to fine 11 250

Silt, sand, and caliche; light brown 8 258

Sand and silt; buff 33 291

Pierre shale

Shale, light yellow grading downward to dark gray 9 300

4. Log of test hole 4 in the NE corner sec. 1, T. 7 S., R. 37 W. (Sherman County). Surface altitude, 3,417.5 feet. Thickness,
feet Depth,
feet

Soil, dark gray-brown 4 4

Sanborn formation

Silt, yellow-gray, containing abundant snails 46 50

Silt, containing clay; sand, and caliche; tan 17 67

Ogallala formation

Gravel, containing sand and caliche 6 73

Silt, containing sand, gravel, and caliche; gray 15 88

Gravel and sand 19 107

Silt, containing gravel, sand, and caliche; buff 23 130

Gravel, fine, containing sand and caliche 6 136

Silt, sand, and caliche; gray to buff 17 153

Gravel, sand, and caliche 4 157

Silt and caliche; light brown 2 159

Gravel and sand 18 177

Silt, sand, and caliche; gray and tan 19 196

Gravel, medium to fine, and sand 4 200

Sand and caliche 7 207

Gravel, sand, and caliche; gray-buff 15 222

Silt, yellow-gray, and caliche 4 226

Sand, gravel, and caliche 37 263

Clay, sand, and caliche; gray 9 272

Gravel, fine, and sand, gray 9 281

Silt and sand; gray-green 3 284

Gravel and sand; gray 11 298

Pierre shale

Shale, light blue-gray and yellow 2 300

Shale, dark gray 10 310

5. Log of test hole 5 in the NE corner sec. 1, T. 7 S., R. 36 W. Surface altitude, 3,383.1 feet. Thickness,
feet Depth,
feet

Soil, dark gray-brown 2 2

Sanborn formation

Silt and sand, very fine; gray-brown 48 50

Ogallala formation

Silt, sand, gravel, and caliche; buff 17 67

Gravel and sand; loosely cemented with calcium carbonate 29 96

Silt and sand; pink-tan; containing gravel and caliche 34 130

Gravel, coarse to fine, and sand; loosely cemented 20 150

Silt, tan, containing sand and caliche 7 157

Gravel, sand, silt, and caliche 8 165

Silt, sand, and caliche; buff 29 194

Gravel and sand; loosely cemented with calcium carbonate 6 200

Caliche, sandy, hard, gray 9 209

Gravel and sand 31 240

Sand, gray 18 258

Pierre shale

Shale, light blue-gray mottled yellow 2 260

Shale, Gray 10 270

6. Log of test hole 6 in the NW corner sec. 6, T. 7 S., R. 34 W. Surface altitude, 3,259.1 feet. Thickness,
feet Depth,
feet

Soil, gray 2 2

Sanborn formation

Silt and sand, very fine; buff-gray 28 30

Silt and clay; buff 20 50

Ogallala formation

Silt, buff; containing sand, gravel, and nodules of caliche 30 80

Gravel, sand, and silt; buff 5 85

Silt, sand, gravel, and caliche 4 89

Gravel and sand 6 95

Silt, sand, and caliche 23 118

Gravel and sand; gray; containing silt and caliche 41 159

Silt, caliche, sand, and gravel; pink-tan 20 179

Gravel, sand, and caliche 6 185

Silt, sand, gravel, and caliche 15 200

Gravel and sand; gray and yellow 46 246

Pierre shale

Shale, light blue-gray and yellow 4 250

Shale, dark gray 10 260

7. Log of test hole 7 in the SW 1/4 SW 1/4 sec. 31, T. 6 S., R. 33 W. Surface altitude, 3,083.8 feet. Thickness,
feet Depth,
feet

Soil, gray-black 3 3

Sanborn formation

Silt and very fine sand; containing nodules of caliche and fragments of snails 23 26

Ogallala formation

Gravel and sand; buff; containing silt and caliche 19 45

Silt, tan; containing sand, gravel, and caliche. 6 51

Gravel and sand; loosely cemented; buff 23 74

Silt, sand, gravel, and caliche; buff 6 80

Gravel, sand, and caliche 7 87

Caliche, silt, and sand 12 99

Gravel and sand 4 103

Pierre shale

Shale, light blue-gray and yellow 7 110

Shale, dark gray 20 130

8. Log of test hole 8 in the NE corner sec. 1, T. 7 S., R. 33 W. Surface altitude, 3,062.1 feet. Thickness,
feet Depth,
feet

Road fill 3 3

Sanborn formation

Silt, tan; containing sand, very fine, and clay 15 18

Ogallala formation

Gravel and sand 9 27

Silt, sand, and gravel; light brown 3 30

Gravel, medium to fine, and sand 10 40

Silt, sand, gravel, and caliche; buff-tan 8 48

Gravel and sand 16 64

Silt, sand, and caliche; buff 15 79

Gravel and sand; loosely cemented 9 88

Silt and sand; buff 10 98

Gravel, sand, and silt; yellow 18 116

Silt and sand; buff 1 117

Gravel, sand, and silt; buff 12 129

Silt, sand, and clay; blue-gray 2 131

Gravel, sand, and silt; buff 9 140

Silt, caliche, and sand; containing a few zones of very hard white caliche 11 151

Gravel and sand 7 158

Pierre shale

Shale, yellow and light gray 9 167

Shale, dark gray 3 170

9. Log of test hole 9 in the SE corner sec. 36, T. 6 S., R. 32 W. Surface altitude, 2,992.4 feet. Thickness,
feet Depth,
feet

Soil, dark gray-brown 2 2

Sanborn formation

Silt and very fine sand; yellow-gray; containing snails 18 20

Silt, containing some sand and fine gravel; yellow-gray 18 38

Silt, clay, and very fine sand; containing abundant snails 7 45

Silt, tan; containing gravel, fine, and sand 15 60

Silt and very fine sand; gray; containing snails 12 72

Ogallala formation

Gravel, fine, and sand 4 76

Silt, caliche, and sand 2 78

Gravel and sand; loosely cemented 15 93

Silt, sand, and caliche; gray and buff 27 120

Gravel, sand, silt, and caliche, gray 9 129

Caliche, sand, hard, white 6 135

Gravel and sand; loosely cemented 3 188

Caliche, very hard, white 3 141

Gravel, fine, sand, and clay; orange-brown 16 157

Silt, grave], sand, and caliche; gray to buff 10 167

Pierre shale

Shale, greenish-gray 3 170

Shale, gray streaked with yellow 20 190

10. Log of test hole 10 in the NE corner sec. 1, T. 7 S., R. 31 W. Surface altitude, 2,950.6 feet. Thickness,
feet Depth,
feet

Soil, dark gray 3 3

Sanborn formation

Silt and very fine sand; yellow-gray 24 27

Silt and clay; buff; containing a small amount of sand and fine gravel 8 35

Ogallala formation

Gravel, sand, and silt; loosely cemented; buff 5 40

Silt, sand, gravel, and caliche; tan 5 45

Gravel and sand; cemented with calcium carbonate 8 53

Silt, gravel, sand, and caliche; tan 4 57

Gravel and sand; containing caliche 21 78

Silt, caliche, sand, and gravel; tan 11 89

Gravel and sand 4 93

Silt, clay, sand, gravel, and caliche; gray 11 104

Sand, fine, and silt, brown 9 113

Gravel and sand 8 121

Silt, gravel, sand, and caliche; brown to gray 9 130

Gravel and sand 13 143

Silt, sand, gravel, and clay; light buff 7 150

Sand, tan, containing gravel and silt 28 178

Gravel, fine, and sand; loosely cemented 7 185

Sand and some gravel 5 190

Gravel, buff, containing sand, silt, and clay 10 200

Silt, buff, containing sand 8 208

Gravel, fine, and sand 12 220

Pierre shale

Shale, bentonitic (?), yellow grading downward to blue-gray 10 230

Shale, gray-black 8 238

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