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The Phosphoria Formation at the Hot Springs Mine in Southeast Idaho: A source of selenium and other trace elements to surface water, ground water, vegetation, and biota
David Z. Piper, J. P. Skorupa, T. S. Presser, M. A. Hardy, S. J. Hamilton, M. Huebner, R. A. Gulbrandsen
2000, Open-File Report 2000-50
Major-element oxides and trace elements in the Phosphoria Formation at the Hot Springs Mine, Idaho were determined by a series of techniques. In this report, we examine the distribution of trace elements between the different solid components aluminosilicates, apatite, organic matter, opal, calcite, and dolomite that largely make up the...
Total petroleum systems of the Trias/Ghadames Province, Algeria, Tunisia, and Libya; the Tanezzuft-Oued Mya, Tanezzuft-Melrhir, and Tanezzuft-Ghadames
T. R. Klett
2000, Bulletin 2202-C
Undiscovered conventional oil and gas resources were assessed within total petroleum systems of the Trias/Ghadames Province (2054) as part of the U.S. Geological Survey World Petroleum Assessment 2000. The Trias/Ghadames Province is in eastern Algeria, southern Tunisia, and westernmost Libya. The province and its total petroleum systems generally coincide with the...
Revision of middle Proterozoic Yellowjacket Formation, central Idaho, and revision of Cretaceous Slim Sam Formation, Elkhorn Mountains area, Montana
Russell G. Tysdal
2000, Professional Paper 1601-A,B
The Yellowjacket Formation is restricted to the strata originally assigned to it by Ross (1934). The Yellowjacket, the conformably overlying Hoodoo Quartzite, and succeeding unnamed argillaceous quartzite unit form a genetically related sequence that lies in a structural block delimited on the northeast by the Iron Lake fault. Directly northeast...
Geohydrology of the shallow aquifers in the Fort Lupton-Gilcrest area, Colorado
Stanley G. Robson, Janet S. Heiny, L. R. Arnold
2000, Hydrologic Atlas 746-C
Urban areas commonly rely on ground water for at least part of the municipal water supply, and as population increases, urban areas expand and require larger volumes of water. However, the expansion of an urban area can reduce ground-water availability. This may occur through processes of depletion (withdrawal of most...
Identifying wells downstream from Laguna Dam that yield water that will be replaced by water from the Colorado River, Arizona and California
Sandra J. Owen-Joyce
2000, Fact Sheet 125-00
This report summarizes a comprehensive study and development of the method documented in Owen-Joyce and others (2000). That report and one for the area upstream from Laguna Dam (Wilson and Owen-Joyce, 1994) document the accounting-surface method to identify wells that yield water that will be replaced by water from the...
What makes a healthy environment for native freshwater mussels?
Water Resources Division, U.S. Geological Survey
2000, Fact Sheet 124-00
Freshwater mussels are sensitive to contamination of sediment that they inhabit and to the water that they filter, making the presence of live, adult mussels an excellent indicator of ecosystem health and stability. Freshwater mussels are relatively immobile, imbedded in the streambed with part of the shell sticking up into...
Water-level altitudes 2000 and water-level changes 1990-2000 and 1999-2000 in the Chicot and Evangeline aquifers, Fort Bend County and adjacent areas, Texas
L.S. Coplin, Horatio X. Santos
2000, Open-File Report 2000-93
This report is one in an annual series of reports that depicts water-level altitudes and water-level changes since 1990 in the Chicot and Evangeline aquifers in Fort Bend County and adjacent areas, Texas.  The report, prepared in cooperation with the Fort Bend Subsidence District, presents maps for the Chicot and...
Processing strategy for water-gun seismic data from the Gulf of Mexico
Myung W. Lee, Patrick E. Hart, Warren F. Agena
2000, Bulletin 2181
In order to study the regional distribution of gas hydrates and their potential relationship to a large-scale sea-fl oor failures, more than 1,300 km of near-vertical-incidence seismic profi les were acquired using a 15-in3 water gun across the upper- and middle-continental slope in the Garden Banks and Green Canyon regions of the Gulf of Mexico....
Borehole geophysical logs at Naval Weapons Industrial Reserve Plant, Dallas, Texas
Christopher L. Braun, Roberto Anaya, Eve L. Kuniansky
2000, Open-File Report 2000-76
A shallow alluvial aquifer at the Naval Weapons Industrial Reserve Plant near Dallas, Texas, has been contaminated by organic solvents used in the fabrication and assembly of aircraft and aircraft parts. Natural gamma-ray and electromagnetic-induction borehole geophysical logs were obtained from 162 poly vinyl-chloride-cased wells at the plant and were...
Suspended sediment in the St. Francis River at St. Francis, Arkansas, 1986-95
W. Reed Green, C. Shane Barks, Alan P. Hall
2000, Open-File Report 99-227
Daily suspended-sediment concentrations were analyzed from the St. Francis River at St. Francis, Arkansas during 1986 through 1995. Suspended-sediment particle size distribution was measured in selected samples from 1978 through 1998. These data are used to assess changes in suspended-sediment concentrations and loads through time. Suspended-sediment concentrations were positively related...
Petroleum system of the Gippsland Basin, Australia
Michele G. Bishop
2000, Open-File Report 99-50-Q
The Gippsland Basin Province 3930, located on the southeastern coast of Australia, is formed from two successive failed rifts that developed into a passive margin during the Cretaceous. Formation of this basin is related to the break up of Gondwana, which resulted in the separation of Antarctica from Australia, and...
Mineral resource potential and geology of the Routt National Forest and the Middle Park Ranger District of the Arapaho National Forest, Colorado, with a section on salable minerals
Viki Bankey, Sandra J. Soulliere, Margo I. Toth, John S. Dersch, Steven M. Smith, James A. Pitkin, Theresa M. Cookro, Laura N. Robinson Roberts, Carol L. Molnia, Craig J. Wandrey, Ben E. Law, Charles W. Spencer, Charles E. Barker
2000, Professional Paper 1610
The assessment of the mineral resource potential of the Routt National Forest and the Middle Park Ranger District of the Arapaho National Forest, Colorado, was conducted so that the mineral resources of the forest can be considered along with other resources in land use planning. This report discusses the potential...