KGS--Hamilton and Kearny Counties--Well Logs 1-27

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Well Logs

Listed in the following pages are the logs of 70 wells and-test holes in Hamilton and Kearny counties, including 27 test holes drilled by the State and Federal Geological Surveys (1-27), 32 water wells (28-59), and 11 oil- and gas-test wells (60-70). The locations of the test holes are shown in figure 2 and most of the wells are shown on plate 2. About two-thirds of the logs were made by well drillers, and many of the drillers' rock names have been changed to conform with geologic terminology. "Gyp" or "gyp rock" has been interpreted to mean caliche, and "soapstone" has been changed to shale or clay. The term "sandrock" is used by drillers to describe a rock, that is so well consolidated that no casing is needed to prevent caving. In the Dakota and Cheyenne formations this has been interpreted to mean sandstone and in the Tertiary and Quaternary deposits it implies a consolidated sand and gravel deposit (often called mortar bed). Much of the Ogallala formation has been logged by well drillers as clay, but in those wells from which cuttings were available for study it was found that much of the so-called clay was silt.

1. Log of test hole 1 in the SE SW sec. 32, T. 20 S., R. 34 W. (Scott county), drilled by State and Federal Geological Surveys, 1940. Surface altitude, 3,089.5 feet. (Authority, samples studied by Perry McNally, H. A. Waite, Bruce F. Latta, and Thad McLaughlin.)			Thickness, feet	Depth, feet
		Soil, sandy, dark	1.5	1.5
Undifferentiated Pleistocene deposits
		Silt and sand, fine; limy; tan; containing gastropods	11	12.5
		Silt and sand, fine; pinkish-brown; containing thin limy zones	5.5	18
		Caliche, soft, tan to light gray	6	24
		Sand, fine to medium, pinkish-brown, containing some silt	2.5	26.5
		Caliche, soft, tan-gray; and clay, limy	6.5	33
		Clay, tan-gray	5	38
		Sand, medium, to gravel, medium; brown	16.5	54.5
Ogallala formation (?)
		Sand and gravel; lime-cemented, gray	4	58.5
		Sand, medium, to gravel, coarse; brown; contains a few lime-cemented zones	37	95.5
		Silt, sandy, light gray-yellow	8	103.5
		Silt, sandy, lime-cemented, soft, light gray; contains lenses of brown, fine to medium sand and fragments of Celtis willistoni (?) and Biorbia fossilia (?)	15.5	119
Niobrara formation
	Smoky Hill chalk member
		Chalk, silty, soft, light yellow to light gray	15	134
		Shale, chalky, soft, dark blue-gray; contains a few fragments of white bentonite	6	140
		Shale, chalky, dark blue-gi-ay; contains interbedded lighter gray hard sandy shale	14	154
	Fort Hays limestone member
		Shale, chalky, dark gray to white	10	164
		Chalk, light gray to white	3	167
		Shale, chalky, light gray to dark gray	5	172
		Chalk, light gray to white	12	184
		Shale, chalky, dark gray	1	185
		Chalk, light gray to white	15	200
		Shale, chalky, light gray to white	19	219
Carlile shale
	Codell sandstone and Blue Hill shale members
		Shale, sandy, nonealeareous, dark gray	33	252
		Shale, sandy, light to dark gray	1.5	253.5
		Shale, clayey, noncalcareous, dark gray to black	16.5	270

2. Log of test hole 2 at NE corner sec. 9, T. 21 S., R. 36 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,220.6 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy, dark	1.5	1.5
Undifferentiated Pleistocene deposits
	Clay, sandy, tan	2.5	4
	Clay, sandy, tan, and caliche	8	12
	Sand, medium, and gravel, fine	10.5	22.5
	Clay, silty and fine sandy, tan	6	28.5
Ogallala formation (?)
	Sand, coarse, and gravel, coarse; brown	59.5	88
	Silt, and sand, fine; light gray	10	98
Niobrara formation
	Shale, chalky, yellow	12	110
	Shale, chalky, white	20	130

3. Log of test hole 3 at SW corner sec. 18, T. 21 S., R. 38 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,421.5 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy, brown	1.5	1.5
Undifferentiated Pliocene and Pleistocene deposits
	Silt, gray to tan	1.5	3
	Clay, sandy, tan	5.5	8.5
	Sand, medium, to gravel, fine; dark brown	2.5	11
	Caliche, tan to white	3	14
	Sand and gravel; consolidated; brown	11	25
	Sand and gravel	15	40
	Clay, sandy, tan	3	43
	Sand, coarse, to gravel, coarse; brown	36	79
	Sand, medium, to gravel, coarse; brown	18	97
	Clay, sandy, tan	2	99
	Caliche, gray to brown	7	106
	Clay, sandy, light gray to tan	19	125
	Sand and gravel; contains silt and fine sand	18	143
	Silt and sand, fine; gray	2	145
	Sand and gravel; brown	10	155
	Silt and sand, fine; tan	15	170
	Sand, medium, to gravel, medium; brown	33	203
	Sand, medium, to gravel, fine; brown	14	217
Niobrara formation
	Chalk, white	13	230

4. Log of test hole 4 at NE corner sec. 18, T. 21 S., R. 39 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,480.4 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)			Thickness, feet	Depth, feet
		Soil, dark	3	3
Undifferentiated Pliocene and Pleistocene deposits
		Silt, tan	5	8
		Silt, sand, and gravel; gray	10.5	18.5
		Gravel, fine to coarse; brown	18.5	37
		Silt and sand; tan	6	43
		Sand, medium, to gravel, coarse; brown	6	49
		Clay, sandy, tan	5.5	54.5
		Sand, coarse, to gravel, coarse; brown	20.5	75
		Clay, silty, tan	8	83
		Silt and sand; limy; gray	5	88
		Gravel, fine to coarse, brown	6	94
		Silt, limy, and sand; tan	20	114
		Gravel, fine to coarse, brown	18.5	132.5
		Sand, coarse, to gravel, coarse; brown	9.5	142
		Clay, silty, gray to pale green	4	146
		Sand, gray to pale green	1	147
		Silt and sand; limy; tan	18	165
		Sand, coarse, to gravel, coarse; brown	10	175
		Silt and sand; limy; gray to tan	3	178
		Gravel, fine to coarse, brown	15	193
		Clay, silt, and sand, fine; tan	2	195
		Gravel, fine to coarse, brown	11.5	206.5
		Clay, silty, gray	8	214.5
		Gravel, medium to coarse	5.5	220
		Clay, silt, and sand; tan	1	221
		Gravel, fine to medium	2.5	223.5
Niobrara formation
	Smoky Hill chalk member
		Chalk, white	6.5	230

5. Log of test hole 5 at SE corner sec. 8, T. 21 S., R. 42 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,757.0 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)			Thickness, feet	Depth, feet
		Soil, dark brown	3	3
Undifferentiated Pleistocene deposits
		Silt and clay; tan; contains lime nodules	13	16
		Silt and sand; limy; gray	5	21
		Sand and gravel; gray	3	24
Ogallala formation (?)
		Silt and sand; tan; some caliche	13	37
		Gravel, consolidated, brown	19	56
Niobrara formation
	Smoky Hill chalk member
		Clay, calcareous, pale yellow to white	3	59
		Chalk, pale yellow	1	60

6. Log of test hole 6 in NW corner sec. 3, T. 21 S., R. 43. W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,783.9 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)			Thickness, feet	Depth, feet
		Soil, silty, brown	3	3
Undifferentiated Pliocene and Pleistocene deposits
		Sand, brown, containing some gravel and caliche	29.5	32.5
		Gravel, fine to coarse, brown	17.5	50
		Silt and clay; greenish-gray	4	54
		Silt and sand; tan	6	60
		Sand, coarse, to gravel, coarse; brown	18.5	78.5
		Sand, tan to gray	2.5	81
		Sand and caliche; gray	5	86
		Silt and sand; tan	4	90
		Sand and caliche; tan to gray	4	94
		Silt, sand, and gravel; tan	15.5	109.5
		Gravel, fine to coarse, brown	12.5	122
Niobrara formation
	Smoky Hill chalk member
		Shale, chalky, brown	8	130

7. Log of test hole 7 at NW corner of sec. 7, T. 22 S., R. 34 W. (Finney County), drilled by the State and Federal Geological Surveys, 1941. Surface altitude, 3,009.1 feet. (Authority, samples studied by Perry McNally and Bruce F. Latta.)		Thickness, feet	Depth, feet
	Soil, sandy, dark	1	1
Undifferentiated Pleistocene deposits
	Silt and sand, fine; limy; tan to brown; containing gastropod shells	36	37
	Silt and sand, fine; tan; containing thin lenses of sand and gravel	5	42
Ogallala formation (?)
	Silt, clayey, hard, t,an and gray, containing fragments of caliche	8	50
	Sand, fine, tan and gray	4	54
	Silt and sand, fine; tan; containing gravel and coarser sand	6	60
	Sand and gravel; fine to coarse	9.5	69.5
	Sand, fine, limy, gray	2.5	72
	Sand and gravel; containing some tan limy silt	31	103
	Sand and gravel; containing caliche and fragments and pebbles of limestone	7	110
	Sand and gravel; cemented; hard; gray	1.5	111.5
	Clay-shale, noncalcareous, greenish yellow	28.5	140

8. Log of test hole 8 at SW corner sec. 10, T. 22 S., R. 36 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,186.6 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy, brown	1	1
Undifferentiated Pleistocene deposits
	Silt and sand; fine; brown	6	7
	Clay, silt, and sand; tan	9	16
	Sand, medium, to gravel, medium; brown	4	20
	Silt and sand, fine; tan to gray	2.5	22.5
	Sand, medium, to gravel, medium; brown	21.5	44
	Sand, medium, to gravel, coarse; brown	19	63
	Silt and sand, fine; tan	17	80
	Sand, medium, to gravel, medium; brown	41	121
Ogallala formation (?)
	Silt and sand, fine; tan to gray	9	130
	Sand, coarse, to gravel, medium; brown	2	132
	Clay, bentonitic, varicolored	20.	152.5
Niobrara, formation (?)
	Shale, calcareous, dark gray	7.5	160

9. Log of test hole 9 at SE corner sec. 15, T. 22 S., R. 38 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,339.6 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy, dark brown	1	1
Undifferentiated Pleistocene deposits
	Silt and sand, fine; tan	16	17
	Sand and gravel; poorly sorted; brown	82	99
	Sand and gravel; containing clay and fragments of caliche	14	113
	Sand, medium, to gravel, coarse; brown to gray	12	125
	Sand and gravel; brown	1	126
Ogallala formation (?)
	Silt and caliche; white to gray	8	134
	Silt and sand, fine; tan	6	140
	Sand, coarse, to gravel, medium; brown	20	160
	Sand, medium, to gravel, medium; brown	11.5	171.5
	Silt and sand, fine; tan to gray	17.5	189
	Sand, medium, to gravel, medium; gray to brown	23.5	212.5
	Clay, silty, blocky, brown	2.5	215
Carlile shale (?)
	Shale, black	5	220

10. Log of test hole 10 at SE corner sec. 25, T. 22 S., R. 39 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,407.9 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)			Thickness, feet	Depth, feet
		Soil, silty, dark brown	3.5	3.5
Undifferentiated Pleistocene deposits
		Silt and sand; tan	11.5	15
		Silt, tan, containing nodules of caliche	15	30
		Sand, fine, to gravel, coarse; brown	13.5	43.5
		Clay, silty, gray	1.5	45
		Sand, fine, to gravel, coarse; brown	41	86
		Silt and sand, fine; tan to gray	14	100
		Gravel, fine to coarse, brown	8	108
		Silt, limy, and sand; brown	11	119
		Sand, fine, to gravel, medium; brown	21	140
		Sand, fine, and silt; tan	11	151
		Sand, fine, to gravel, medium	8	159
		Sand, coarse, to gravel, coarse; brown	26	185
Ogallala formation (?)
		Silt, limy, and sand; gray	31	216
		Clay, silt and sand; tan	3	219
		Gravel, fine to coarse; brown	46.5	265.5
Niobrara formation (?)
	Smoky Hill chalk member
		Clay, calcareous, blue-gray and tan	4.5	270
		Clay, calcareous, orange-yellow to blue-gray	10	28O

11. Log of test hole 11 in NW corner sec. 18, T. 22 S., R. 40 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,594.1 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)			Thickness, feet	Depth, feet
		Soil, sandy, tan to brown	3	5
Undifferentiated Pliocene and Pleistocene deposits
		Silt and sand, fine; tan	13	16
		Sand, coarse, to gravel, coarse; brown	11	27
		Caliche, gray to white	1	28
		Sand, coarse, to gravel, coarse; brown	43	71
		Silt and sand, fine; tan	2.5	73.5
		Sand, fine, to gravel, fine; brown	15.5	89
		Silt and caliche;	10.5	99.5
		Sand, medium, to gravel, medium; brown	26	125.5
		Caliche, sand, and gravel	5.5	131
		Sand, coarse, to gravel, medium; brown	8	139
		Clay, silt, and sand; gray to white	8.5	147.5
Niobrara formation
	Smoky Hill chalk member
		Chalk, white to gray	7.5	155
		Chalk, white	3.5	158.5
		Chalk, white to tan	2.5	161
	Fort Hays limestone member
		Limestone, chalky, white to tan	29	190
		Limestone, chalky, white to gray	7	197
		Shale, calcareous, blue-gray	9	206
		Shale, calcareous, brown to gray	10	216
		Shale, calcareous, blue-gray	7.5	223.5
Carlile shale
	Codell sandstone member
		Shale, sandy, noncaleareous, blue-gray	16.5	240

12. Log of test hole 12 at SW corner sec. 15, T. 23 S., R. 36 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,209.4 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy	1	1
Undifferentiated Pliocene and Pleistocene deposits
	Clay, sandy, brown	10	11
	Sand, fine to coarse, brown	4	15
	Silt and sand, fine; white to tan	6	21
	Sand, fine, and gravel; brown	14	35
	Silt and sand, fine; gray to tan	4	39
	Gravel, fine to coarse, brown	17	56
	Sand, fine, tan to brown	8	64
	Clay, sandy, containing sand and gravel; gray	3	67
	Sand, medium, to gravel, medium; brown	19	86
	Silt and sand, fine; tan to gray	17	103
	Silt, sand, and gravel; tan	6	109
	Sand, medium, to gravel, medium; brown	10	119
	Clay, sandy, tan	4	123
	Sand, coarse, to gravel, fine; brown	6.5	129.5
	Silt and sand, fine; light gray to brown	36.5	166
	Clay, silty, yellow to tan	8	174
	Sand and gravel; brown	16	190
	Silt and sand, fine; tan to brown	10	200
	Sand and gravel; brown; contains some clay	10	210
	Caliche, light gray	4	214
Greenhorn limestone (?)
	Limestone, dense, light to medium gray	5	219
	Shale, clayey, tan	1.5	220.5
	Shale, calcareous, black	3.5	224
	Limestone, dense, light to medium gray	1	225
	Shale, calcareous, black	2	227
	Limestone, dense, light to medium gray	.5	227.5
	Shale, calcareous, black	.5	228
	Limestone, gray	.5	228.5
	Shale, black, and limestone, gray	1.5	230

13. Log of test hole 13 at SE corner sec. 13, T. 23 S., R. 38 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,318.3 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)			Thickness, feet	Depth, feet
		Soil, sandy, dark brown	1	1
Undifferentiated Pleistocene deposits
		Clay, sandy, tan	9	10
		Silt and sand, fine; tan; contains some caliche	16	26
		Sand,, coarse, to gravel, coarse; brown	17	43
		Silt and sand, fine; tan	6.5	49.5
		Sand, medium, to gravel, coarse; brown	16	65.5
		Silt and sand, fine; tan to gray; contains some clay	7	72.5
		Sand, medium, to gravel, medium; brown	5.5	78
		Silt and sand, fine; light gray to tan	4	82
		Sand, medium, to gravel, medium; brown	6	88
		Silt and sand, fine; light gray to tan	2	90
		Sand, medium, to gravel, medium; brown	10	100
		Sand, fine, to gravel, medium; brown	5	105
Ogallala formation (?)
		Silt and sand, fine; light gray to tan	15	120
		Sand, medium, to gravel, medium; brown	10	130
		Silt and sand, fine; light gray to tan; caliche	13	143
		Sand and gravel; brown	4	147
		Clay, silty, tan	18	165
		Silt and sand, fine; tan; containing some gravel	7.5	172.5
		Sand, medium, to gravel, medium; brown	11.5	184
		Clay, silty, gray to tan, containing sand and gravel	29	213
		Sand, medium, to gravel, fine; gray	13.5	266.5
		Clay, silty, tan to gray	5.5	232
		Sand, fine, to gravel, medium; gray	26.5	258.5
		Clay, silty, tan, containing sand and gravel	13.5	272
		Sand, coarse, to gravel, medium; brown	7.5	279.5
		Silt and sand, fine; light gray	4.5	284
		Sand, coarse, to gravel, medium; brown	4	288
		Clay, silty, tan	3	291
Carlile shale
	Blue Hill shale member
		Shale, black to gray	11.5	302.5
		Shale, clayey, tan to black	27	329.5
		Shale, clayey, tan	9	338.5
		Shale, clayey, black	9.5	348
		Limestone, hard, gray	.5	348.5
		Shale, black	2	350.5
	Fairport chalky shale member
		Limestone, chalky, white, containing shale and bentonite	20	370.5
		Shale, calcareous, black	26	396.5
		Limestone, chalky, gray, containing some shale	6.5	403
		Shale, calcareous, black	6	409
		Limestone, gray	3	412
		Shale, calcareous, gray to black	9	421
		Shale, calcareous, black	7	428
		Limestone, hard, and shale, calcareous, gray to black	45.5	473.5
		Limestone, hard, gray to white	26.5	500
Greenhorn limestone (?)
	Bridge Creek limestone member
		Limestone, hard, gray to white	20	520
		Shale, calcareous, gray, and limestone, hard, gray	60	580
	Hartland shale member (?)
		Shale, calcareous, gray	30	610
	Lincoln limestone member (?)
		Limestone, hard, buff to gray, and interbedded shale	7	617

14. Log of test hole 14 at NE corner sec. 13, T. 24 S., R. 35 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 2,925.5 feet. (Authority, samples studied by Laurence P. Buck and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy, light brown	1	1
Alluvium
	Sand, coarse, rusty	3	4
	Gravel, fine to coarse	16	20
	Sand, coarse, and gravel, coarse	9	29
	Silt and sand, fine; brown; contains some gravel	11	40
Undifferentiated Pliocene (?) and Pleistocene deposits
	Silt and sand, fine; tan	34	74
	Silt and sand, fine; gray	4	78
	Caliche, gray	2	80
	Silt and sand, fine; gray	12	92
	Sand, coarse, and gravel, coarse	6	98
	Sand, fine, gray to tan	19	117
	Sand, coarse, and gravel, medium	7	124
	Silt and sand, fine; tan to gray	17	141
	Sand, coarse, and gravel, coarse; containing fine sand	22.5	163.5
	Sand, fine, blue-gray to gray	16.5	180
	Silt and sand, fine; blue-gray	20	200
	Silt and sand, fine; blue-gray; containing some gravel	20	220
	Sand, fine, to gravel, coarse; tan	25	245
	Sand, fine, light tan	5	250
	Sand, coarse, to gravel, medium	17	267
	Sand, fine, to gravel, medium; tan to gray	8	275
	Sand, coarse, to gravel, medium; tan	5	280
	Sand, coarse, to gravel, medium; tan; contains some sand, fine	10	290
	Sand, fine to coarse; tan; contains some gravel	10	300
	Sand, coarse, to gravel, medium	10	310
	Sand, medium, to gravel, coarse	4	314
	Sand, fine, containing some clay and fine gravel	16	330
	Sand, coarse, to gravel, coarse	16	346
	Sand, fine, and silt; tan	4	350
	Sand, coarse, to gravel, coarse; containing rounded fragments of caliche	10.5	360.5
Graneros shale
	Shale, noncaleareous, black to light gray	8.5	369

15. Log of test hole 15 at NW corner sec. 21, T. 24 S., R. 37 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,275.0 feet. (Authority, samples studied by Laurence P. Buck and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy, light brown	2	2
Undifferentiated Pleistocene deposits
	Silt and sand, fine to coarse; light brown	13	15
	Caliche, tan	6	21
	Sand, fine, tan to brown	7.5	28.5
	Sand, coarse, to gravel, coarse; brown	31.5	60
	Sand, fine, brown	4	64
	Sand, coarse, to gravel, coarse; brown	32.5	96.5
	Sand, fine, and silt; tan	5	101.5
	Gravel, fine to coarse	1.5	103
	Silt and sand, fine; tan to gray	7	110
Ogallala formation
	Gravel, fine, and sand	6	116
	Sand, fine, and silt; tan	20	136
	Silt and sand, fine; light brown	14	150
	Sand, medium, to gravel, medium	7	157
	Silt and sand, fine; gray to brown	15	172
	Caliche, light gray	.5	172.5
	Silt and sand, fine; tan	10.5	183
	Sand, fine, tan	9.5	192.5
	Sand, coarse, to gravel, coarse	12	204.5
	Silt and sand, fine; tan	7.5	212
	Sand, fine, tan, containing some gravel	26.5	238.5
	Clay, blocky, tan	11.5	250
Greenhorn limestone
	Shale, calcareous, dark gray	27	277
	Shale, black, and limestone, gray	6.5	283.5
	Shale, clayey, calcareous, gray	7	290.5
Graneros shale
	Shale, light gray.	1	291.5
	Shale, silty, gray	.5	292
	Shale, tan to dark gray	24	316
	Shale, fissile, gray, and bentonite, tan	2	318
	Shale, clayey, dark gray	12	330

16. Log of test hole 16 in SW corner sec. 30, T. 24 S., R. 40 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,286.4 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
Undifferentiated Pleistocene deposits
	Sand, fine to medium, brown	3	3
	Silt, sand, and gravel; brown	7	10
	Sand, coarse, and gravel, coarse; brown	46	56
	Silt and sand, fine; tan	4	60
	Sand and gravel; brown	6	66
Graneros shale
	Shale, black	29	95
	Limestone, hard, gray, and shale, black	5	100
	Shale, noncalcareous, black	22.5	122.5
Dakota formation
	Sandstone, gray, and shale, sandy	2.5	125
	Shale, blue-gray, and sandstone, hard	5	130
	Shale, sandy, and sandstone, gray to tan	20	150

17. Log of test hole 17 in SW corner sec. 2, T. 24 S., R. 43 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,367.3 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
Dune sand
	Sand, fine to medium, brown	6	6
Alluvium
	Silt, sandy, brown	10	16
	Gravel, coarse, brown	24	40
	Gravel, coarse, containing a thin bed of clay	10	50
	Gravel, coarse, brown	74	124

18. Log of test hole 18 NE corner sec. 34, T. 24 S., R. 43 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,503.8 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)			Thickness, feet	Depth, feet
		Soil, silty, brown (probably loess)	16	16
Undifferentiated Pleistocene (?) deposits
		Clay, silty, gray to tan	2.5	18.5
Greenhorn limestone
	Lincoln limestone member
		Clay, calcareous, tan	10	28.5
		Chalk, white, and shale, calcareous, tan	3.5	32
		Limestone, chalky, and shale, calcareous	4.5	36.5
		Limestone, chalky, hard	4	40.5
Graneros shale
		Shale, fissile, black	7.5	48
		Shale, blue, containing some bentonite	1.5	49.5
		Shale, fissile, black	20.5	70

19. Log of test hole 19 at the SE corner sec. 26, T. 25 S., R. 35 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 2,992.5 feet. (Authority, samples studied by Laurence P. Buck and Thad McLaughlin.)		Thickness, feet	Depth, feet
Dune sand
	Sand, fine to medium	34	34
Undifferentiated Pleistocene deposits
	Sand, coarse, and gravel, coarse	62	96
	Silt and sand, fine	7	103
	Sand, fine, and gravel, fine to coarse	7	110
	Sand, coarse, and gravel, coarse	10	120
	Sand, fine, and gravel, fine	30	150
	Sand, fine, and gravel, coarse	7	157
	Silt and clay	6	163
	Silt, containing some gravel	26	199
	Gravel, coarse, to sand, coarse	12	201
	Sand and gravel; consolidated	9	210
	Gravel, fine to coarse, consolidated	7	217
	Gravel, fine to coarse, and sand	31	248
	Sand, silt, and gravel; consolidated	52	300
	Sand, fine, and caliclie	26	326
	Sand, fine, to gravel	34	360
	Silt and sand, fine; containing gravel	31	391
	Sand, fine, to gravel, medium	9	400
	Clay, silty	10	410
	Clay, containing silt, sand, and gravel	12	422
	Clay, silty, containing sand and gravel	14	436
Dakota formation
	Clay and clay shale; silty	10	446
	Sandstone	4	450

20. Log of test hole 20 at SE corner sec. 34, T. 26 S., R. 36 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude 3,090.5 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
Dune sand
	Sand, fine, tan to gray	30	30
Undifferentiated Pleistocene deposits
	Sand, fine to coarse, brown	18	48
	Silt and sand, fine; tan to brown	35	83
	Sand, fine, brown, containing clay and pebbles of caliche	7	90
	Sand, coarse, to gravel, coarse; brown	45	135
	Gravel, fine to coarse, brown	5	140
	Sand, coarse, to gravel, coarse; tan to brown	35	175
	Sand, medium, to gravel, fine; brown	4	179
	Sand, coarse, to gravel, coarse; brown	21	200
	Sand, medium, to gravel, medium; brown	16	216
	Clay, silty, gray to buff	7	223
	Sand, medium, to gravel, fine; brown	101	324
	Clay, silty, varicolored	10.5	334.5
	Sand, coarse, to gravel, coarse; brown	10.5	345
Ogallala formation (?)
	Silt and sand, fine; tan, to gray; and caliche	35	380
	Silt and sand, fine; tan to gray; and clay, black	10	390
	Sand, fine, to gravel, fine; brown	10	400
	Clay, silty, tan to gray	6	406
Dakota formation
	Sandstone, dark brown, and clay, varicolored	1	407
	Sandstone, white to gray	3	410

21. Log of test hole 21 at SE corner sec. 33, T. 26 S., R. 37 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,073.9 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy, brown	4	4
Undifferentiated Pliocene and Pleistocene deposits
	Clay, silty, greenish-gray	6	10
	Clay, silty to fine sandy; gray	5	15
	Clay, silty and fine sandy; tan to gray	21	36
	Sand, fine, and silt; tan	4	40
	Clay, sandy, and silt; tan	30	70
	Silt and sand; fine; tan	10	80
	Silt, sand, and gravel	3	83
	Silt and sand, fine; brown	19	102
	Silt and sand, fine; tan; contains some gravel	48	150
	Clay, silty, tan, containing fine sand and gravel	22.5	172.5
	Clay, silty and fine sandy; dark gray	47.5	220
	Clay, silty, dark gray, containing lenses of sand and gravel	9	229
	Silt, sand, and gravel; brown	11	240
	Sand, medium, and gravel, fine	12	252
	Silt, and sand, fine; light gray	12	264
	Clay, silty and fine sandy; tan	56	320
Dakota formation
	Sandstone, white, containing concretions of iron	20	340

22. Log of test hole 22 at SE corner sec. 31, T. 26 S., R. 38 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,203.2 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy, brown	1	1
Undifferentiated Pleistocene deposits
	Silt and sand, fine; tan to gray	17	18
	Sand and gravel; containing some silt	15	33
	Silt and sand, fine; tan	11.5	44.5
	Sand, medium, to gravel, coarse; brown	30	74.5
	Caliche, white	1.5	76
	Sand, medium, to gravel, coarse; brown	6	82
Ogallala formation (?)
	Silt and sand, fine; tan to oray	39	121
	Caliche, soft, light gray to white	14	135
	Caliche, tan, containing fragments of sandstone, brown	7	142
Dakota formation
	Sandstone, brown, and clay, yellow	3	145
	Shale and sandstone; varicolored	8.5	153.5
	Shale, sandy, blue-gray, and sandstone, fine	1.5	155
	Shale and sandstone, fine; varicolored	2.5	157.5
	Sandstone, rusty-brown	2.5	160

23. Log of test hole 23 at NE corner sec. 1, T. 26 S., R. 39 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,281.1 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, silty, brown	2.5	2.5
Undifferentiated Pliocene and Pleistocene deposits
	Silt, and sand, fine; tan	7.5	10
	Sand, fine, brown	10	20
	Silt, limy, and sand, tan	8	28
	Gravel, fine to coarse; brown	22	50
	Silt and sand; tan	14	64
	Clay, sandy, tan, containing caliche	6	70
	Silt and clay; tan	10	80
	Sand and silt; limy; tan	9	89
Dakota formation
	Sandstone, gray	1	90
	Sandstone, fine-grained, gray	5	95
	Sandstone, fine-grained, varicolored	5	100

24. Log of test hole 24 in SE corner sec. 36, T. 26 S., R. 40 W., drilled by State and Federal Geological Surveys, 1941. Surface altitude, 3,303.2 feet. (Authority, samples studied by Perry McNally and Thad McLaughlin.)		Thickness, feet	Depth, feet
	Soil, sandy, brown	1	1
Undifferentiated Pliocene and Pleistocene deposits
	Silt and sand, fine; tan	11	12