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Abstract

Introduction

Geography

General Geology

Ground Water

Geologic Formations

Cross Sections

Logs of wells

References

Plates

Logs of wells and test holes, page 5 of 5

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Meade formation
		Silt, dark brown	2	2
		Silt, tan	2	4
		Silt, buff to tan; contains nodules of calcium carbonate	4	8
		Sand, coarse to fine; contains fragments of green shale	2	10
		Sand, medium; contains fragments of shale	4	14
Permian--Leonardian
	Ninnescah shale
		Shale, tan and greenish gray	3	17
		Shale, brick red	3	20

25-6-20bc--Sample log of test hole in the SW NW sec. 20, T. 25 S., R. 6 W.; drilled 1949. Surface altitude, 1,469.9 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Alluvium
		Soil, sandy, fine	4	4
		Sand, fine to coarse, and fine to coarse gravel	4	8
		Gravel, fine to coarse, fine to coarse sand, some clay	1	9
		Gravel, fine to coarse, and fine to coarse sand	2	11
		Sand, fine to coarse, some fine to coarse gravel	9	20
		Gravel, fine to coarse, some fine to coarse sand, much Permian-derived gravel, some red and brown clay	17	37
Permian--Leonardian
	Ninnescah shale
		Shale, red	2	39

25-7-6ccc--Sample log of test hole in the SW cor. SW SW sec. 6, T. 25 S., R. 7 W.; drilled 1949. Surface altitude, 1,604.2 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
		Soil, sandy, dark gray	2	2
	Sanborn formation
		Sand, coarse to fine, some fine to medium gravel	8	10
	Meade formation
		Silt, yellow gray; contains much fine to coarse sand	4	14
		Gravel, fine, and sand, some medium gravel and yellow-gray silt	16	30
		Gravel, medium to fine, and sand; some coarse gravel, and yellow-gray silt	40	70
		Gravel, fine to medium, and sand	4.5	74.5
Permian--Leonardian
	Harper sandstone
		Siltstone, fine sandy, brick red	1.5	76

25-8-24ddd--Sample log of test hole in the SE cor. SE SE sec. 24, T. 25 S., R. 8 W.; drilled 1949. Surface altitude, 1,541.2 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Dune sand
		Sand, medium to fine	1	1
	Terrace deposits
		Silt, tan, and fine to coarse sand	2	3
		Gravel, medium to fine, and sand	4	7
Permian--Leonardian
	Harper sandstone
		Shale and siltstone, fine to sandy, red brown	1	8

25-10-12ccc--Sample log of test hole in the SW car. SW SW sec. 12, T. 25 S., R. 10 W.; drilled 1949. Surface altitude, 1,733.9 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Dune sand
		Sand, medium to fine	5	5
	Sanborn formation
		Clay, light gray green and light brown; contains much sand and fine gravel	8	13
		Gravel, fine, and sand and yellow-brown silt; few pebbles	7	20
		Gravel, fine to medium, and sand; few pebbles	10	30
		Gravel, fine to coarse, and sand	5	35
		Gravel, fine to medium, and sand	13.5	48.5
	Meade formation
		Silt, light brown; contains much fine to coarse sand	2.5	51
		Gravel, fine, and sand; some light-brown and light-gray silt	19	70
		Gravel, fine to coarse, and sand	15	85
		Silt, light brown; contains much thin-bedded fine sand	9.5	94.5
		Gravel, fine to medium, and sand; few pebbles	5	99.5
Permian--Leonardian
	Harper sandstone
		Siltstone, red	0.5	100

26-4-6cc--Sample log of test hole in the SW cor. sec. 6, T. 26 S., R. 4 W.; drilled 19,39. Surface altitude, 1,434.2 feet.

Permian--Leonardian
	Ninnescah shale
		Silt and clay, brown (weathered shale)	2	2
		Shale, brick red, blocky	1	3
		Shale, soft, calcareous, light gray	2	5
		Shale, blocky, brick red	5	10
		Shale, brick red and greenish gray	10	20

26-6-6ddd--Sample log of test hole in the SE cor. SE SE sec. 6, T. 26 S., R. 6 W.; drilled 1949. Surface altitude, 1,575.6 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
		Road fill	1	1
	Sanborn formation
		Silt, tan and buff, sand and fine gravel	5	6
		Gravel, fine to coarse, and sand	5	11
		Silt and clay, yellow gray; contains much fine sand	2	13
	Meade formation
		Sand, fine to coarse, grading downward to fine gravel and sand	7	20
		Sand, coarse to fine, some fine to medium gravel, and yellow-gray silt	20	40
		Gravel, medium to fine, and sand; some light-gray silt	10	50
		Gravel, fine to coarse, and sand	4	54
	Blanco formation
		Clay and silt, light gray green and light tan; contains much fine to coarse sand	2.5	56.5
		Gravel, fine to medium, and sand. Much gravel, coarse to pebbles	11.5	68
Permian--Leonardian
	Ninnescah shale
		Shale, gray green and red brown	1	69

26-6-18cb--Sample log of test hole in the NW SW sec. 18, T. 26 S., R. 6 W.; drilled 1950. Surface altitude, 1,570.2 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Sanborn formation
		Silt, sandy, dark brown	4	4
	Meade formation
		Sand, fine to coarse, some brown silt; some fine to coarse gravel	7	11
		Sand, fine to coarse, some fine gravel	21	32
		Sand, fine to coarse	9	41
	Blanco formation
		Sand, fine to coarse, and few gray clay streaks	9	50
		Gravel, fine to coarse, and fine to coarse sand	16	66
Permian--Leonardian
	Ninnescah shale
		Shale, red	2	68

26-7-24ccc--Sample log of test hole in the SW cor. SW SW sec. 24, T. 26 S., R. 7 W.; drilled 1949. Surface altitude, 1,602.1 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Sanborn formation
		Silt, tan, and fine to coarse gravel	3	3
		Sand, fine to coarse, some fine gravel	7	10
	Meade formation
		Gravel, medium to fine, and sand; some coarse gravel, and light-gray silt	10	20
		Gravel, fine, and sand, interbedded with silt and yellow-gray clay	21	41
		Silt and clay, light brown	1	42
		Gravel, fine to coarse, and sand	3.5	45.5
	Blanco formation
		Clay and silt, light brown and light greenish gray; contains much caliche	8.5	54
		Silt and clay, light brown; contains much fine sand and few sandstone pebbles; thin bedded	7	61
		Silt and clay, light gray brown; contains much fine sand; hard caliche at 61 to 62 feet	9	70
		Silt and clay, light gray; contains much fine to coarse sand	6	76
		Silt and clay, light gray green and light tan; contains much coarse to fine sand	8	84
		Gravel, medium to fine, and sand	1	85
Permian--Leonardian
	Ninnescah shale
		Shale, red brown and gray green	2	87

26-8-18cc--Sample log of test hole in the SW SW sec. 18, T. 26 S., R. 8 W.; drilled 1950. Surface altitude, 1,635.0 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Sanborn formation and Meade formation
		Silt, brown sandy	3	3
		Silt, tan to buff	3	6
		Silt, buff and gray sandy, some caliche and fine gravel	7	13
		Sand, medium, red-brown stain; some tan clay at 17 feet	5	18
	Blanco formation
		Clay, buff to gray; much fine sand	8	26
		Sand, fine to coarse, and fine gravel, some Cretaceous-derived material	12	38
		Gravel, medium to fine; some coarse to fine sand; much Cretaceous-derived gravel	2	40
Permian--Leonardian
	Harper sandstone
		Shale, red	3	43

26-8-25aaa--Sample log of test hole in the NE cor. NE NE sec. 25, T. 26 S., R. 8 W.; drilled 1949. Surface altitude, 1,617.5 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Meade formation
		Soil, dark gray grading downward to brown; contains coarse to fine gravel and sand	2	2
		Gravel, medium to fine sand, and tan silt; some coarse gravel	5.5	7.5
		Clay and silt, light gray; contains much coarse to fine sand and fine to medium gravel	2.5	10
	Blanco formation
		Clay, blocky, yellow gray	3	13
		Clay and silt, light gray; contains much coarse to fine sand and caliche	8	21
		Clay and silt, white, light bronvn, and light gray green, thin bedded; contains much caliche	3	24
		Gravel, medium to fine, and sand	8.5	32.5
Permian--Leonardian
	Harper sandstone
		Siltstone, fine to sandy, thin bedded, red brown	.5	33

26-9-34aaa--Sample log of test hole in the NE NE NE sec. 34, T. 26 S., R. 9 W.; drilled 1950. Surface altitude, 1,672.8 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
		Soil, brown, fine sandy	3	3
	Sanborn formation
		Clay, tan, much fine to coarse sand and some fine gravel	4	7
		Clay, tan, some fine to coarse sand, and fine to coarse gravel	4	11
		Clay, tan to buff, fine sandy	13	24
		Sand, fine to medium (red-brown stain)	1.5	25.5
	Meade formation
		Clay, buff, fine sandy	9.5	35
		Clay, buff; much caliche	3	38
		Clay, buff, and sand; coarse and fine gravel	5	43
		Sand, medium to coarse; clay streaks, buff	17	60
		Sand, medium to coarse, some fine to medium gravel and buff clay streaks	20	80
		Sand, medium to coarse, and fine gravel	17	97
		Sand, medium to coarse, and fine gravel; buff clay streaks	9	106
	Blanco formation
		Clay, dark gray, fine sandy	12	118
		Sand, medium to coarse; some medium to fine gravel, some Cretaceous-derived fragments	12	130
		Sand, medium to coarse, and fine to medium gravel, some Cretaceous-derived material	17	147
Permian--Leonardian
	Harper sandstone
		Siltstone and red shale, alternating hard and soft layers	8	155

26-10-2cd--Sample log of test hole in the SE cor. SW sec. 2, T. 26 S., R.10 W.; drilled 1949. Surface altitude, 1,708.5 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Sanborn formation
		Gravel, fine to coarse, and sand; some light-gray silt and clay	10	10
		Gravel, fine, and sand; some medium gravel and buff and light-gray silt	10	20
		Gravel, fine, and sand; some medium to coarse gravel and buff and light-gray silt	8.5	28.5
	Meade formation
		Clay and silt, light gray, yellow brown; contains much fine to coarse sand at 30 to 36 feet and caliche at 34 feet	7.5	36
		Sand, coarse to fine, some fine gravel	4	40
		Sand, coarse to fine, some fine to medium gravel, some gray and buff silt	20	60
		Gravel, fine to medium, and sand; some buff silt	25	85
	Blanco formation
		Clay, bentonitic, light gray green and brown; contains much fine to medium sand	9	94
		Clay and silt, gray brown	2	96
		Silt, buff; contains much fine to coarse sand and caliche	3	99
		Sand, fine to coarse, some fine gravel	10	109
		Clay, light brown, partly fine sandy	8	117
		Sand, fine to coarse, some fine to medium gravel; some light-gray and brown clay in lower part	13	130
		Gravel, medium to fine, and sand	5	135
Permian--Leonardian
	Harper sandstone
		Shale, red brown	2	137

26-10-27ddd--Sample log of test hole in the SE cor. SE SE sec. 27, T. 26 S., R. 10 W.; drilled 1949. Surface altitude, 1,690.5 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Dune sand
		Sand, medium to fine, silty	3.5	3.5
	Sanborn formation
		Silt and clay, brown gray; contains some fine to coarse gravel and sand	2.5	6
		Silt and clay, light greenish gray and light brown; contains much coarse to fine gravel and sand	5	11
		Gravel, fine to coarse, and sand	1.5	12.5
	Meade formation
		Clay and silt, yellow gray, light gray, and light brown, alternating sandy and non-sandy; contains some caliche	7.5	20
		Sand, coarse to fine, much fine gravel	10	30
		Gravel, medium fine, and sand; some yellow-gray clay	10	40
		Sand, coarse to fine, some fine gravel	10	50
		Gravel, fine to medium, and sand	4.5	54.5
Permian--Leonardian
	Harper sandstone
		Siltstone, hard, white and light green, and fine to very fine sandstone	5.5	60

26-11-36dd--Sample log of test hole in the SE cor. sec. 36, T. 26 S., R. 11 W.; Pratt County; drilled July 1951. Surface altitude, 1,759.5 feet.

Quaternary--Pleistocene			Thickness, feet	Depth, feet
	Dune sand
		Sand and gray-black silt	1	1
		Silt, clayey, red, and fine sand	6	7
	Sanborn formation
		Sand, clayey, fine; contains some fine gravel	4	11
		Gravel, fine to coarse; contains clay streaks	3	14
		Sand, silty to clayey, fine	4.5	18.5
		Sand, very fine; contains some ligbt-gray silt	15.5	34
		Sand, fine to medium; contains some yellow-brown silt	7.5	41.5
	Meade formation
		Clay, tan to gray; contains fine sand	3.5	45
		Sand, fine to medium, very clayey	6	51
		Sand, fine to medium	9	60
		Sand, coarse	3	63
		Sand, fine to coarse, and fine to coarse gravel	7	70
		Sand, fine to medium, silty	10	80
		Sand, fine to medium, clayey	20	100
	Blanco formation
		Silt, sandy, yellow brown, limy	10	110
		Sand, silty, fine to medium	10	120
		Sand, clayey, fine to medium	16	136
		Sand, fine; contains some gray-tan clay	11	147
Permian--Leonardian
	Harper sandstone
		Sandstone, pink to light red, very hard	3	150
		Sandstone, red, soft	4	154
		Siltstone to fine sandy shale, red, hard	6	160

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