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Page 4732, results 118276 - 118300

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Mineral resource potential map of the Spanish Peaks Wilderness Study Area, Huerfano and Las Animas counties, Colorado
Karin E. Budding, Steven E. Kluender
1983, Miscellaneous Field Studies Map 1542-C
A geologic and geochemical investigation and a survey of mines and prospects have been conducted to evaluate the mineral resource potential of the Spanish Peaks Wilderness Study Area, Huerfano and Las Animas Counties, in south-central Colorado. The·study area is underlain by sedimentary rocks of Paleozoic to Tertiary age (Johnson, 1969)....
A practical, low-noise coil system for magnetotellurics
William D. Stanley, Richard D. Tinkler
1983, Open-File Report 83-85
Magnetotellurics is a geophysical technique which was developed by Cagnaird (1953) and Tikhonov (1950) and later refined by other scientists worldwide. The technique is a method of electromagnetic sounding of the Earth and is based upon the skin depth effect in conductive media. The electric and magnetic fields arising from...
Potential effects of surface coal mining on the hydrology of the Greenleaf-Miller area, Ashland coal field, southeastern Montana
G. W. Levings
1983, Water-Resources Investigations Report 82-4101
The Greenleaf-Miller area of the Ashland coal field contains reserves of Federal coal that have been identified for potential lease sale. A hydrologic study was conducted in the potential lease area in 1981 to describe the existing hydrologic system and to assess potential impacts of surface coal mining on local...
Determination of dissolved aluminum in water samples
A.A. Afifi
1983, Water-Resources Investigations Report 82-4018
A technique has been modified for determination of a wide range of concentrations of dissolved aluminum (Al) in water and has been tested. In this technique, aluminum is complexed with 8-hydroxyquinoline at pH 8.3 to minimize interferences, then extracted with methyl isobutyl ketone (MIBK). The extract is analyzed colorimetrically at...
Surface-water quality in the Campbell Creek basin, Anchorage, Alaska
T. P. Brabets, L.A. Wittenberg
1983, Water-Resources Investigations Report 83-4096
Four streams in the Campbell Creek Basin were sampled during different flow conditions for an 18-month period. North Fork Campbell and South Fork Campbell Creeks drain areas virtually undisturbed by man 's activities. The other two streams, Little Campbell Creek and the main stem Campbell Creek, drain areas that have...
Guide to North Dakota's ground-water resources
Q.F. Paulson
1983, Water Supply Paper 2236
Ground water, the water we pump from the Earth through wells or that which flows naturally from springs, is one of North Dakota's most valuable resources. More than 60 percent of the people living in the State use ground water for one purpose of another. It is the only source...
Habitat Suitability Information: Blacknose dace
Joan G. Trial, Jon G. Stanley, Mary Batcheller, Gary Gebhart, O. Eugene Maughan, Patrick C. Nelson
1983, FWS/OBS 82/10.41
A review and synthesis of existing information were used to develop riverine and lacustrine habitat models for Blacknose dace, a freshwater species. The models are scaled to produce an index of habitat suitability between 0 (unsuitable habitat) to 1 (optimally suitable habitat) for freshwater, marine, and estuarine areas of the...
Ground water in carbonate rocks and regolith in the Fairview area, Tennessee
C.R. Burchett, Ann Zurawski, A.K. Sparkes, E. F. Hollyday
1983, Water-Resources Investigations Report 83-4134
Fourteen test wells drilled in the Fairview area, Tennessee, produce from 3 to 100 gallons per minute and have an average yield of 32 gallons per minute, measured while blowing water from the wells with compressed air. In comparison, the average yield of supply wells reported by drillers is 13...
Map showing outcrops of basaltic rocks of early Quaternary and Tertiary age, Basin and Range province, Southern California
Kurt Roggensack, David A. Lopez
1983, Water-Resources Investigations Report 83-4116-G
This map report is one of a series of geologic and hydrologic maps covering all or parts of States within the Basin and Range province of the western United States. The map reports contain detailed information on subjects that characterize the geohydrology of the province, including the ground-water hydrology/ ground-water...
Hydrology and subsidence potential of proposed coal-lease tracts in Delta County, Colorado
Tom Brooks
1983, Water-Resources Investigations Report 83-4069
Potential subsidence from underground coal mining and associated hydrologic impacts were investigated at two coal-lease tracts in Delta County, Colorado. Alteration of existing flow systems could affect water users in the surrounding area. The Mesaverde Formation transmits little ground water because of the neglibile transmissivity of the 1,300 feet of...
Water quality of Lake Arlington on Village Creek, north-central Texas; 1973 to 1981
Freeman L. Andrews, Willard J. Gibbons
1983, Water-Resources Investigations Report 83-4196
Water in Lake Arlington on Village Creek in north-central Texas had volume-weighted average concentrations of less than 240 milligrams per liter of dissolved solids, less than 30 milligrams per liter of dissolved chloride, and less than 40 milligrams per liter of dissolved sulfate between January 29, 1973, and August 20,...
Water resources data, Alabama, water year 1982
H.C. Rollins, F.C. Sedberry, E.G. Ming, I.A. Giles
1983, Water Data Report AL-82-1
Water resources data for the 1982 water year for Alabama consist of records of stage, discharge, and water quality of streams; stage and contents of lakes and reservoirs; and water levels in wells. This report contains discharge records for 85 gaging stations; stage only for 16 gaging stations, stage and...
Water resources data West Virginia, water year 1982
W.N. Embree, E.A. Friel, T. A. Ehlke, S.M. Ward
1983, Water Data Report WV-82-1
Water resources data for the 1982 water year for West Virginia consist of records of stage, discharge, and water quality of streams and springs; stage and contents of lakes and reservoirs; and water levels in wells. This report contains discharge records for 116 gaging stations; stage only records for 9...