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Table of Contents
Abstract
Introduction
Geography
Geology
Ground Water
Water Bearing Formations
Well Records
Well Logs
References
Plates
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Table 6
Table 6--Physical properties of samples of the Ogallala formation from the measured section in sec. 30, T. 5 S., R. 32 W., Rawlins County. By Ada Swineford and Carrie B. Thurber.
| No. of bed in measured section |
Mechanical analysis (percent by weight) |
Coefficient of permeability* |
Percent soluble in dilute HCl |
| Coarse gravel (larger than 4.0 mm) |
Medium gravel (4.0-2.0 mm) |
Fine gravel (2.0-1.0 mm) |
Coarse sand (1.0-0.5 mm) |
Medium sand (0.5-0.25 mm) |
Fine sand (0.5-0.25 mm) |
Very fine sand (0.125-0.062) |
Silt and clay (less than 0.062 mm) |
| 9 |
2.0 |
5.6 |
9.2 |
11.7 |
17.2 |
16.4 |
16.0 |
21.9 |
107 |
9.3 |
| 7 |
|
0.1 |
0.5 |
3.6 |
25.1 |
36.9 |
18.2 |
15.6 |
154 |
9.4 |
| 5 |
0.2 |
2.0 |
4.3 |
11.1 |
24.1 |
31.8 |
18.4 |
8.0 |
172 |
4.2 |
| 4 |
0.6 |
4.5 |
9.5 |
16.1 |
28.1 |
27.0 |
10.8 |
3.3 |
|
38.1 |
| 3 |
5.4 |
4.3 |
12.1 |
27.2 |
33.1 |
15.2 |
2.2 |
0.4 |
609 |
1.9 |
| 2 |
|
tr. |
1.6 |
11.4 |
30.5 |
36.5 |
11.4 |
8.4 |
|
23.4 |
| 1 |
|
|
0.1 |
5.5 |
20.3 |
26.8 |
19.2 |
28.1 |
107 |
3.0 |
* Gallons of water a day, at 60 deg. F., that is conducted laterally through each mile of water-bearing bed under investigation (measured at right angles to the direction of the flow), for each foot of thickness of the bed and for each foot per mile of of hydraulic gradient.
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