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Page 5318, results 132926 - 132950

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Not all publications have extents, not all extents are completely accurate
Preliminary data on some Precambrian deposits of zinc-copper-lead sulfides and zinc spinel (granite) in Colorado
Douglas M. Sheridan, William H. Raymond
1977, Open-File Report 77-607
Precambrian sulfide deposits in the Southern Rocky Mountains in Colorado are being studied and re-evaluated according to geologic concepts which were developed in recent years in other parts of the world during successful research regarding economic massive sulfide deposits. These studies, initiated in 1974 in Colorado by the U.S. Geological...
Geology and ground water in Door County, Wisconsin, with emphasis on contamination potential in the Silurian dolomite
Marvin G. Sherrill
1977, Open-File Report 77-61
Door County, a recreational and fruit-growing area bordering Lake Michigan in northeastern Wisconsin, has had a long history of ground-water contamination from surface and near-surface sources. Contamination is most severe in late summer when fruit-canning operations and the influx of tourists create additional wastes. Silurian dolomite is the upper bedrock...
Preliminary study of sources and processes of enrichment of manganese in water from University of Rhode Island supply wells
William Dudley Silvey, Herbert E. Johnston
1977, Open-File Report 77-561
Concentrations of dissolved manganese have increased from 0.0 to as much as 3.3 mg/liter over a period of years in closely spaced University of Rhode Island supply wells. The wells tap stratified glacial deposits and derive part of their water from infiltration from a nearby river-pond system. The principal sources...
The Pierre Shale, northern Great Plains; a potential isolation medium for radioactive waste
George W. Shurr
1977, Open-File Report 77-776
The purpose of this reconnaissance is to assess the potential of the Pierre Shale, of Late Cretaceous age, as a possible isolation medium for radioactive wastes. The regional stratigraphic and structural setting of the Pierre Shale in the northern Great Plains is summarized from subsurface data. Geologic attributes mapped and...
Appraisal of ground-water conditions in Merced, California, and vicinity
R. W. Page
1977, Open-File Report 77-454
Merced is in the northeastern part of the San Joaquin Valley, California. The fresh-ground-water basin is about 1,200 feet thick. Five aquifers are defined in the Merced area: (1) The Mehrten Formation (Miocene and Pliocene), (2) a confined aquifer , (3) an intermediate aquifer, (4) a shallow aquifer, and (5)...
Water-level records for the lower Arkansas River Valley of Colorado, 1973-77
Robert D. Penley
1977, Open-File Report 77-560
Water-level measurements made in more than 465 wells in March 1977 in the lower Arkansas River valley of southeastern Colorado are presented. Measurements for the preceding 4 years are included to serve as references illustrating declining or rising water levels. Changes in water levels from December 1975 to March 1977...
Water-level records for the San Luis Valley of Colorado, 1973-77
Robert D. Penley
1977, Open-File Report 77-265
Water-level measurements were made in 122 wells in January 1977. Changes in water levels from January 1976 to January 1977 ranged from a rise of 10.0 feet (3.0 meters) to a decline of 8.6 feet (2.6 meters) both of which occurred in Costilla County. Measurements for the three preceding winters...
National coal resource investigations of the United States Geological Survey
1977, Open-File Report 77-763
The objective of this report is to provide a record of some of the goals and accomplishments of the coal resource investigations of the U. S. Geological Survey for 1977. Successful completion of these goals will aid the Nation in the years ahead because proper usage of coal resource data...
Simulated changes in ground-water levels resulting from proposed phosphate mining, west-central Florida; preliminary results
William Edward Wilson
1977, Open-File Report 77-882
A digital model of two-dimensional ground-water flow was used to simulate projected changes in the Floridan aquifer potentiometric surface in 1985 and 2000, resulting from proposed ground-water developments by the phosphate mining industry in west-central Florida. The .model was calibrated under steady-state conditions to simulate the September 1975 potentiometric surface....
Hydrologic data for Mountain Creek, Trinity River basin, Texas, 1975
H.D. Buckner
1977, Open-File Report 77-72
Mountain Creek drains the northeast corner of Johnson County, the northwest corner of Ellis County, the southeast corner of Tarrant County, and part of the southwest corner of Dallas County, Tex. The basin is 30 miles long and averages 10 miles in width. The total drainage area at the mouth...