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Logs of Wells and Test Holes

The following are logs of 95 test holes drilled in Grant and Stanton counties. Sixty-nine of these test holes were drilled by the State and Federal Geological Surveys and are headed "Sample log of test hole in . . . "

These tests were logged by the authors during drilling and supplemented by studying the formation samples. Twenty-six of the test holes were drilled by commercial well drillers for individual land owners, and formation samples were collected; these are headed "Sample logs of test holes drilled by . . . " These 26 test holes were logged by the personnel of the Geological Survey from the formation samples and the descriptions may differ somewhat from that of the drillers.

In addition, 342 test holes drilled and logged by commercial well drillers are summarized in Table 19 and Table 20. An asterisk after the well number in Tables 19 and 20 indicates that a descriptive log is also included in this report, and an "e" after the altitude means that the altitude was estimated. Table 2 presents similar information from electrical and radioactivity logs.

Stanton County

27-39-13bda--Sample log of test hole drilled in NE SE NW sec. 13, T. 27 S., R. 39 W., 0.3 mile south and 25 feet west of N 1/4 cor. sec. 13; September 3, 1959; altitude of land surface, 3,180 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene (?)
			Silt, gray	5	5
			Silt, brownish-gray	5	10
			Silt, sandy, caliche-cemented, light-gray	20	30
			Sand, fine to medium, caliche-cemented, buff-tan	5	40
			Sand, very coarse, and fine to medium gravel	10	50
			Sand, very coarse; and fine to medium gravel (probably occurring in thin beds)	19	69
	Pliocene
		Ogallala Formation
			Clay, silty, tan-brown	6	75
			Sand, fine to coarse; predominantly quartz	5	80
			Sand, fine, and tan-brown silt; silt occurs as thin beds	15	95
			Silt, buff-tan; with fine to medium sand; caliche-cemented	15	110
			Sand, fine to coarse, predominantly quartz; with buff-tan silt	13	123
			Silt, buff-tan; with fine sand	17	140
			Sand, medium to very coarse; predominantly quartz; with buff-tan silt	15	155
			Silt, buff-tan; with fine to medium sand	35	190
Cretaceous
	Lower Cretaceous
		Dakota Formation [Lower (?) Cretaceous]
			Sandstone, fine, friable, red-brown	23	213
			Sandstone, fine, friable, iron-cemented, red-brown	17	230
			Shale, silty, and red-brown, friable sandstone	30	260
			Shale, silty, and brown, friable sandstone	70	330
		Kiowa Shale
			Shale, silty, brownish-gray; interbedded hard and soft streaks	110	440
		Cheyenne Sandstone
			Sandstone, friable, whitish-gray; interbedded with gray-blue shale	60	500
			Shale, very hard, black	3	503
			Sandstone, friable, thin bedded; with gray-blue shale	34	537
Triassic
	Upper Triassic
		Dockum Group
			Sandstone, fine, red	8+	545

27-39-18bbb--Sample log of test hole drilled in NW NW NW sec. 18, T. 27 S., R. 39 W., 10 feet south and 50 feet east of NW cor. sec. 18, October 26, 1959, altitude of land surface, 3,187 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Silt, gray-brown, and clayey silt	10	10
			Silt, dark-brown	18	28
			Sand, fine to coarse, and fine to medium gravel	8	36
			Silt, gray	4	40
			Sand, fine to coarse, and gray silt	10	50
			Silt, clayey, gray; with thin hard streaks	10	60
			Sand, fine, brown, and gray silt	10	70
			Silt, clayey, fossiliferous, blue to dark-gray	20	90
			Silt, sandy, fossiliferous, gray	10	100
	Pliocene
		Ogallala Formation
			Clay, gray and brown	10	110
			Sand, fine to coarse, silty	30	140
			Sand, fine to coarse, silty, and fine gravel	25	165
			Caliche, soft	1	166
			Sand, fine to coarse, silty, and fine gravel	11	177
			Sand, fine to coarse, fine to coarse gravel, and yellow to white clay; predominantly brown sandstone fragments	13+	190

27-40-17dcc--Sample log of test hole drilled in SW SW SE sec. 17, T. 27 S., R. 40 W., 45 feet north and 30 feet east of SW cor. sec. 17; June 22, 1960; altitude of land surface, 3,267 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Topsoil	2	2
			Silt, sandy, tan; with caliche streaks	45	47
			Silt, sandy, brown	18	65
			Sand, fine to coarse, brown; contains a little fine gravel	12	77
			Clay, sandy, tan	10	87
			Volcanic ash, unweathered, white	3	90
			Silt, sandy, brown	15	105
			Sand, fine to medium, brown	5	110
			Sand, fine to coarse, brown; contains silt streaks and a little fine gravel	22	132
	Pliocene
		Ogallala Formation
			Silt, sandy, tan	15	147
			Sand, fine to coarse, brown	5	152
			Silt, sandy, brown	26	178
			Sand, fine to medium. brown	14	192
			Silt, brown; with sand streaks and caliche	52	244
			Clay, hard, gray and brown streaks	12	256
			Clay, pink; contains a little ironstone	2	258
			Clay, hard, brown and gray; contains a few sandstone and ironstone fragments	42	300
			Clay, silty, yellow-tan	10	310
Cretaceous
	Lower (?) Cretaceous
		Dakota (?) Formation
			Shale, sandy, green	15	325
			Shale, dark-gray; with a few hard sandy streaks	25+	350

27-41-1bbb--Sample log of test hole drilled in NW NW NW sec. 1, T. 27 S., R. 41 W., in NW cor. sec. 1; 1940; altitude of land surface, 3,265 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Silt, fine sandy, tan to gray	25	25
			Silt, fine sandy and clayey, gray	11	36
			Sand, gray to brown, and gravel	8	44
			Silt, sandy, light-brown	26	70
			Sand, medium to coarse, tan, and fine to coarse gravel	10	80
			Silt, tan, sand, and gravel	10	90
			Sand, fine to coarse, tan, and fine to medium gravel	11	101
			Silt, light-gray and brown, and clay	9	110
			Silt and clay, blue-gray	10	120
			Silt, fine sandy, brown	4	124
			Sand, fine to coarse, tan	16	140
			Sand, fine to coarse, tan, and fine to coarse gravel	10	150
			Sand, coarse, tan, and fine to coarse gravel	19	169
	Pliocene
		Ogallala Formation
			Silt, sandy, brown	16	185
			Sand, coarse, tan, and fine to coarse gravel	18	203
			Silt and clay, sandy, brown	14	217
			Sand, medium to coarse, tan, and fine to medium gravel	9	226
Cretaceous
	Lower Cretaceous
		Dakota Formation [Lower (?) Cretaceous]
			Sandstone, yellow-brown and red-brown	4	230
			Shale, soft, light-gray and blue	2.5	232.5
			Sandstone, light-brown, yellow- and red-brown	5	237.5
			Sandstone, red-brown, and alternating yellow and gray shale	6.5	244
			Shale, yellow, gray, and blue	6	250
			Sandstone, soft, yellow to light-brown	20	270
			Shale, sandy, gray-green and yellow	19	289
		Kiowa Shale
			Shale, clayey, blue-gray	16	305
			Shale, sandy, hard, blue-gray	10	315
			Shale, clayey, soft, blue-gray	15	330
			Shale, hard, blue-gray	26	356
		Cheyenne Sandstone
			Sandstone, fine to medium, gray	14	370
			Shale, clayey, blue-gray, and fine, hard sandstone	24	394
			Sandstone, soft, light-gray	10	404
			Sandstone, hard, buff	8	412
Triassic
	Upper Triassic
		Dockum Group
			Shale, red and light-gray	5	417
			Sandstone, buff	2	419
			Shale, red, and yellow-brown, soft sandstone	5	424
			Shale, red and light-gray	3	427
			Sandstone, hard, light-brown to buff	14	441
			Shale, red-brown and light-gray	22	463
			Sandstone, light-gray to buff	30	493
			Siltstone, hard, red	5	498
			Shale, gritty, light-gray to white	6.5	504.5
			Sandstone, light-brown to buff	5.5	510
			Shale, silty, red-brown, light-gray, and gray-green	13	523
			Sandstone, buff to gray-brown	65	588
			Sandstone, hard, fine, buff, blue-green, and gray	25	613
			Shale, silty, light-gray and blue-gray	4+	617

27-41-13bbb--Sample log of test hole drilled in NW NW NW sec. 13, T. 27 S., R. 41 W.; altitude of land surface, 3,274 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Road fill	4	4
			Soil, silty, brown to black	4	8
			Silt, limy, gray	5	13
			Sand, medium, tan	6	19
			Silt, limy, gray	8	27
			Silt, sandy, brown, and fine sand	12	39
			Sand, fine to coarse, tan, and fine to coarse gravel	3.5	42.5
			Silt, sandy, light-brown	7.5	50
			Sand, fine to coarse, tan	7	57
			Clay, silty, brown and gray	9	66
			Sand and gravel, poorly sorted, tan	42.5	108.5
			Silt, sandy, brown to gray	24.5	133
			Sand, medium to coarse, tan, and fine gravel	1.5	134.5
			Silt, sandy, tan, and some caliche	35.5	170
			Sand, medium to coarse, tan, and fine to coarse angular gravel	20	190
	Pliocene
		Ogallala Formation
			Sand and gravel and silt in alternating beds	10	200
			Silt, sandy, limy, brown, and caliche	5	205
			Sand, medium to coarse, and fine to coarse gravel; poorly sorted	9	214
			Silt, sandy, tan, and some caliche	6	220
			Gravel, fine to coarse, poorly sorted; contains abundant pebbles of Dakota sandstone	8	228
Cretaceous
	Lower (?) Cretaceous
		Dakota Formation
			Shale, sandy and silty, yellow to brown	5	233
			Shale, sandy, yellow, and red-brown very fine sandstone	7+	240

27-42-24cc--Sample log of test hole drilled in SW SW sec. 24, T. 27 S., R. 42 W., SW cor. sec. 24; June 23, 1960; altitude of land surface, 3,410 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Topsoil	2	2
			Silt, brown	26	28
			Sand, medium to coarse; tan silt streaks; some fine gravel	26	54
			Silt, brown; caliche streaks	8	62
			Sand, medium to coarse, some brown silt	23	85
			Silt, tan	31	116
			Silt, sandy, tan	4	120
			Sand, fine; some tan silt	15	135
			Silt, sandy, tan	25	160
			Sand, fine to medium, brown	21	181
	Pliocene
		Ogallala Formation
			Silt, brown	5	186
			Sand, fine, brown	15	201
			Sand, fine, brown, and brown clay streaks	9	210
			Sand, fine, brown	15	225
			Silt, brown	1	226
			Sand, fine to medium, brown	14	240
			Sand, medium to coarse	11	251
			Silt, sandy, brown	4	255
			Silt, brown, and tan streaks	15+	270

27-43-1ccc--Sample log of test hole drilled in SW SW sec. 1, T. 27 S., R. 43 W., 110 feet north and 10 feet east of SW cor. sec. 1; June 24, 1960; altitude of land surface, 3,521 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Topsoil	2	2
			Silt, brown	12	14
			Caliche, soft	4	18
			Silt, brown	30	48
			Sand, fine, brown	8	56
			Silt, brown	1	57
			Sand, fine to coarse; some fine gravel	4	61
			Silt, brown; some caliche	29	90
			Silt, brown, sandy	4	94
			Sand, fine to coarse; some gravel	4	98
			Silt, brown	20	118
			Silt, brown; streaks of sand	12	130
			Sand, fine	6	136
	Pliocene
		Ogallala Formation
			Silt, brown	26	162
			Silt, gray	5	167
			Silt, tan	14	181
			Silt, brown	14	195
			Sand, medium	6	201
			Silt, brown	8	209
			Silt, brown; streaks of yellow silt and sand	31	340
			Silt, brown; streaks of tan silt	12	252
			Sand, fine to medium	20	272
			Sand, fine to medium; streaks of silt	5	277
			Silt, brown; streaks of tan silt	21	298
			Sand, fine to coarse	37	335
			Silt, brown to tan, sandy	33	368
			Silt, brown to tan	10	378
			Clay, blue	2+	380

27-43-23aaa--Sample log of test hole drilled in NE NE NE sec. 23, T. 27 S., R. 43 W., NE cor. sec. 23; 1939; altitude of land surface, 3,527 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Road fill	2	2
			Silt, limy, light-brown (loess)	2	4
			Sand, fine, brown; contains caliche fragments	5	9
			Silt, sandy, brown, contains a little caliche	14	23
			Sand, fine, tan, and coarse, poorly sorted gravel	16	39
			Silt, hard, limy, sandy, creamy-brown	3	42
			Sand, medium to coarse, tan, and fine to medium gravel	3	45
			Gravel, very coarse, angular, tan	9	54
			Silt, light-brown	6	60
			Sand, medium to coarse, tan and fine angular gravel	7	67
			Silt, sandy, brown	11	78
			Sand, fine to coarse, tan, and fine gravel	10	88
			Silt, sandy, brown to gray-green	12	100
			Silt, sandy, tan; contains a little semiconsolidated sand and a few gastropod shell fragments	9	109
			Sand, medium to coarse, tan, and fine to medium angular gravel	6.5	115.5
	Pliocene
		Ogallala Formation
			Silt, sandy, hard, brown, and caliche	8.5	124
			Sand, medium to coarse, tan, and fine to medium angular gravel	5	129
			Silt, sandy, brown, and caliche; contains a few hard limestone fragments	4	133
			Sand, fine to coarse, tan, and fine to coarse gravel	23	156
			Silt, sandy, red-brown	2	158
			Sand, fine to coarse, red-brown, and clay	12	170
			Sand, fine to coarse, tan	5	175
			Silt, clayey, sandy, brown and gray, and caliche	7	182
			Clay, soft, red-buff; contains dark-brown iron nodules	2	184
			Clay, soft, weathered, yellow-brown, and red	6	190
			Clay, soft, varicolored; and light-gray sand	10+	200

28-39-2ccc--Sample log of test hole drilled in SW SW sec. 29 T. 28 S.9 R. 39 W., near southwest cor. sec. 2; 1939; altitude of land surface, 3,152 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Topsoil,, tan	2	2
			Soil, gray; limy strips	2	4
			Silt, sandy, light-brown	10	14
			Silt, sandy, brown, and red-brown loose sand	10	24
			Silt, sandy, light gray, brown, and white	26	50
			Sand, fine to medium, tan	5	55
			Silt, sandy, limy, brown	17	72
			Sand, fine to coarse, tan	8	80
			Clay and volcanic ash, soft, white	14	94
			Silt, light-brown and gray; some caliche	23	117
			Silt, sandy, limy, brown and gray	41	158
			Silt, sandy, light-brown; scattered sand, gravel, and caliche	22	180
			Clay, silty, sticky, tan	28	208
			Silt, sandy, tan, and sand lenses	16	224
			Silt, sandy, tan	10	234
			Silt, limy, tan, light-gray and white	5	239
			Gravel, medium to very coarse	27	266
	Pliocene
		Ogallala Formation
			Clay, silty, sticky, tan	9	275
			Sand and silt, limy, gray, interbedded	3	278
			Sand, fine to coarse, tan	3	281
			Silt, sandy, limy, light-brown	5	286
			Sand, fine, tan and gray	5	291
			Silt, sandy, limy, light-brown	4	295
			Sand, fine to coarse, tan	6	301
			Silt, sandy, limy, light-brown and gray	4	305
			Sand, fine to coarse, and caliche	6	311
			Caliche, hard	5	316
			Sand, loose, and caliche	8	324
			Silt, gritty, limy, light-gray to white-tan	6	330
			Clay and sandstone fragments	3	333
			Clay, sandy, yellow and gray; drilled hard	17+	350

28-39-2dc--Sample log of test hole drilled by Juel Water Well Drilling Co. for M. C. Romersi in SW SE sec. 2, T. 28 S., R. 39 W., 0.1 mile north and 0.4 mile west of SE cor. sec. 2; March 1959; altitude of land surface, 3,143 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene (?)
			No sample or log	100	100
			Silt, sandy, brown, tan, and thin, fine sand strips	63	163
			Clay and silt strips, brown	15	178
			Sand, very fine, and silt strips	34	212
			Sand, fine	13	225
			Gravel, medium to very coarse	25	250
	Pliocene
		Ogallala Formation
			Clay and caliche	6	256
			Sand, medium to coarse	14	270
			Silt, sandy, brown	6	276
			Clay, brown	4	280
			Sand, medium, brown	7	287
			Clay	3	290
			Sand, medium, brown	10	300
			Sand, gravel, and caliche	8	308
			Sand, medium to coarse	14	322
			Sand, medium, and gravel	16	338
			Clay and caliche	10	343
Cretaceous
	Lower Cretaceous
		Dakota (?) Formation [Lower (?) Cretaceous]
			Sandstone, yellow and gray strips	23	371
		Kiowa Shale
			Shale, blue	49	420
			Shale and sandstone	3	423
			Shale, blue and brown	19	442
			Shale, blue, and sandstone strips	25	467
			Shale, blue	16	483
		Cheyenne Sandstone
			Sandstone; very few thin shale strips	97+	580

28-39-13cbb--Sample log of test hole drilled in NW SW sec. 13, T. 28 S., R. 39 W., 30 feet south and 30 feet east of W 1/4 cor. sec. 13; June 1960; altitude of land surface, 3,143 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Topsoil, gray	10	10
			Sand, fine, silty, brown	10	20
			Sand, fine, brown	20	40
			Sand, medium, coarse	10	50
			Sand, fine, silty, brown	20	70
			Sand, fine to medium	10	80
			Sand, fine to coarse, and clay	20	100
			Clay, brown	10	110
			Silt, brown, and clay strips	10	120
			Sand, fine, brown	15	135
			Clay, brown, and fine sand	25	160
			Sand, fine to coarse, brown	15	175
			Clay, light-gray and brown	20	195
			Sand, fine, brown	5	200
			Clay, gray-blue and brown	25	225
			Clay, gray; contains fossils	33	258
			Sand, coarse	12	270
			Sand, coarse, and gravel strips	30	300
	Pliocene
		Ogallala Formation
			Sand, coarse, and clay strips	50	350
			Clay, yellow, and fine sand strips	15+	365

28-39-19aaa--Sample log of test hole drilled in NE NE sec. 19, T. 28 S., R. 39 W., 40 feet south and 30 feet west of NE cor. sec. 19; 1959; altitude of land surface, 3,198 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Topsoil, gray	5	5
			Silt, brown	5	10
			Silt, brown	10	20
			Sand, fine, brown	15	35
			Clay, and silt, brown	13	48
			Sand, fine, brown	12	60
			Sand, coarse, and fine gravel	14	74
			Clay, brown	12	86
			Sand, fine, and brown clay	5	91
			Clay, gray	9	100
			Clay, brown	15	115
			Sand, coarse	20	135
			Clay, brown, and fine sand strips	15	150
			Sand, fine to coarse	10	160
			Sand, coarse	14	174
			Clay, gray	2	176
			Clay, brown, and fine sand	14	190
			Sand, fine to coarse	10	200
			Sand, medium, brown, and clay strips	35	235
			Sand, medium	15	250
	Pliocene
		Ogallala Formation
			Clay, brown, and fine sand strips	40	290
			Sand, coarse	10	300
			Clay, brown	10	310
			Sand, fine, brown, and clay strips	10	320
			Sand, coarse, and fine gravel	12	332
			Clay and sand strips	13	350
			Sand, coarse, brown	10	360
			Clay, brown-tan; very fine sand strips	5	365
			Clay, fine sand, and caliche strips	15	380
			Clay, brown, and fine sand strips	20+	400

28-40-21dc2--Sample log of test hole drilled by Juel Water Well Drilling Co. for J. A. Ramsey in SW SE sec. 21, T. 28 S., R. 40 W., about 0.5 mile west of SE cor. sec. 21; July 28, 1959; altitude of land surface, 3,280 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene (?)
			Topsoil and clay	18	18
			Sand	42	60
			Silt, tan to yellow-brown	50	110
			Silt, tan, and caliche	10	120
			Sand, fine to coarse, silty, brown, and fine gravel	55	175
			Clay, green-tan	5	180
			Silt, tan-brown	20	200
			Silt, brown	10	210
			Silt, sandy, brown-tan	10	220
			Sand, fine to coarse, silty, tan, and fine gravel	30	250
	Pliocene
		Ogallala Formation
			Silt, very sandy, tan	30+	300

28-41-9ccc--Sample log of test hole drilled in SW SW SW sec. 9, T. 28 S., R. 41 W., 30 feet north and 30 feet east of SW cor. sec. 9; June 1960; altitude of land surface, 3,376 feet.				Thickness, feet	Depth, feet
Neogene
	Undifferentiated Pleistocene
			Topsoil	2	2
			Sand, fine silty, brown	3	5
			Clay, silty, gray	4	9