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Page 4974, results 124326 - 124350

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Borehole geophysical measurements for hole UE25-3, Nevada Test Site, Nuclear Waste Isolation Program
Jeffrey J. Daniels, James H. Scott
1980, Open-File Report 80-126
Borehole geophysical measurements made in drill hole UE25a-3 with a U.S. Geological Survey research well-logging truck are presented in this paper. The purpose of these logging measurements is to provide in-situ physical properties information that is not commercially available on drill hole UE25a-3. Well logs are presented in this paper...
Potassium-argon geochronology of the eastern Transverse Ranges and southern Mojave Desert, southern California
F. K. Miller, D. M. Morton
1980, Professional Paper 1152
More than 200 potassium-argon apparent ages on minerals from crystalline rocks, chiefly from the San Bernardino and eastern San Gabriel Mountains and the southern Mojave Desert, define an area greater than 10,000 km2 in which the potassium-argon isotopic systematics have been highly disturbed. The disturbance or disturbances appear to have...
The surficial aquifer at the U.S. Naval Station near Mayport, Florida
Bernard J. Franks
1980, Open-File Report 80-765
The surficial aquifer at the U.S. Naval Station near Mayport, Florida, consists of about 70 feet of unconsolidated sand, shell , and clay. The principal water-bearing zone is a shell bed 35 to 55 feet below land surface. The aquifer is unconfined, and the water table was about 4 feet...
Appraisal of the water resources of the Big Sioux aquifer, Brookings, Deuel, and Hamlin counties, South Dakota
Neil C. Koch
1980, Water-Resources Investigations Report 80-100
The Big Sioux aquifer in Brookings, Deuel, and Hamlin Counties, South Dakota, has been extensively developed and in some areas discharge, principally by wells, from the aquifer may be exceeding recharge to the aquifer.A finite-difference method digital model was used to simulate steady-state conditions of the Big Sioux aquifer. Average...
Mekometer measurements in the Imperial Valley, California, 1980
Ronald G. Mason, C.N. Crook, Perry Rowley Wood
1980, Open-File Report 81-1141
During a six-week period in the Spring of 1980, approximately seven months after the October 15, 1979 earthquake, parts of the Imperial Valley mekometer network (Fig. 1) were re-measured for comparison with measurements made during the twelve months preceding the earthquake and the six weeks following it. The purpose was...
Quality of ground water in Routt County, northwestern Colorado
Kenneth J. Covay, R.L. Tobin
1980, Water-Resources Investigations Report 80-956
Chemical and bacteriological data were collected to describe the quality of water from selected geologic units in Routt County, Colo. Calcium bicarbonate was the dominant water-chemistry type; magnesium, sodium, and sulfate frequently occurred as codominant ions. Specific conductance values ranged from 50 to 6,000 micromhos. Mean values of specific conductance,...
Probable high ground-water levels on Cape Cod, Massachusetts
Michael H. Frimpter
1980, Open-File Report 80-1008
Water-level records from 146 short-term (1 year) observation wells and 13 long-term (16-28 years) observation wells were used to estimate the probable high ground-water level that could occur at any site on Cape Cod. The estimation was based on correlation of a single water-level measurement from a test site with...
Dissolved-solids concentrations and loads in return flows to the Colorado River from agricultural land in southern California
John M. Klein, Wesley L. Bradford
1980, Water-Resources Investigations Report 80-52
The dissolved-solids concentration in Colorado River water increases from less than 50 mg/L (milligrams per liter) at the river's origin to about 700 mg/L at the California border and to about 900 mg/L at the United States-Mexico boundary. Much of the latter increase is due to depletion by agricultural use...
A procedure for predicting concentrations of dissolved solids and sulfate ion in streams draining areas strip mined for coal
Hugh E. Bevans
1980, Open-File Report 80-764
Current trends in increased coal production neccessitate the development of techniques to appraise the environmental degradation that results from strip mining. A procedure is introduced for the prediction of dissolved-solids and sulfate-ion concentrations in streams draining strip-mined areas as functions of the percentage of the drainage area that has been...