Recharge to and discharge from the Edwards aquifer in the San Antonio area, Texas, 1995
D.S. Brown, J.T. Patton
1996, Open-File Report 96-181
The Edwards aquifer is the sole source of public water supply for more than 1 million people in the San Antonio area and supplies large quantities of water for agriculture, industry, and the military. The dissolutioned, faulted limestone aquifer is the major source of water for Bexar, Comal, Hays, Medina,...
The role of mineral resource assessments in ecological stewardship
Sandra H. B. Clark
1996, Open-File Report 96-63
Bedrock geology and mineral resource assessments can provide important information for ecologically based stewardship of land and water. Combining information derived from mineral resource assessments and geoenvironmental mineral deposit models provides a means to rapidly screen a large region for potential for mineral concentrations, to assess the environmental risk associated...
Digital representation of the Washington state geologic map: a contribution to the Interior Columbia River Basin Ecosystem Management Project
Gary L. Raines, Bruce R. Johnson
1996, Open-File Report 95-684
This report describes the digital representation of the Washington state geologic map (Hunting and others, 1961). This report contains an explantion of why the data were prepared, a description of the digital data, and information on obtaining the digital files. This report is one in a series of digital maps,...
Simulation of water quality for Salt Creek in northeastern Illinois
Charles S. Melching, T.J. Chang
1996, Open-File Report 96-318
Water-quality processes in the Salt Creek watershed in northeastern Illinois were simulated with a computer model. Selected waste-load scenarios for 7-day, 10-year low-flow conditions were simulated in the stream system. The model development involved the calibration of the U.S. Environmental Protection Agency QUAL2E model to water-quality constituent concentration data collected...
Digital National Uranium Resource Evaluation (NURE) geochemistry for the Pacific Northwest: A contribution to the Interior Columbia River Basin Ecosystem Management Project
Gary L. Raines, Cole L. Smith
1996, Open-File Report 95-686
No abstract available....
Hydrogeology of structurally extended terrain in the eastern Great Basin of Nevada, Utah, and adjacent states, from geologic and geophysical models
M. D. Dettinger, Donald H. Schaefer
1996, Hydrologic Atlas 694-D
The Great Basin of the western United States encompasses most of Nevada and western Utah (fig. 1). The climate of the region is semiarid to arid, with most precipitation falling as winter Show. The region is characterized by internal drainage (generally no hydrologic outlet to the ocean). Water resources in...
Digital representation of the Idaho State geologic map; a contribution to the Interior Columbia River basin ecosystem management project
B. R. Johnson, G. L. Raines
1996, Open-File Report 95-690
No abstract available....
Some chemical and physical properties of clinoptilolite-rich rocks
G. A. Desborough
1996, Open-File Report 96-265
Digital representation of the Montana state geologic map: A contribution to the Interior Columbia River Basin Ecosystem Management Project
G. L. Raines, B. R. Johnson
1996, Open-File Report 95-691
No abstract available....
Hydrologic and water-quality data for the Weldon Spring Ordnance Works, St. Charles County, Missouri, 1992-95
John G. Schumacher, L.M. Merten, E. A. Hockanson, S.N. DeRusseau
1996, Open-File Report 96-218
Geohydrology and evaluation of stream-aquifer relations in the Apalachicola-Chattahoochee-Flint River basin, southeastern Alabama, northwestern Florida, and southwestern Georgia
Lynn J. Torak, Gary S. Davis, George A. Strain, Jennifer G. Herndon
1996, Water Supply Paper 2460
The lower Apalachicola-Chattahoochee-Flint River Basin is underlain by Coastal Plain sediments of pre-Cretaceous to Quaternary age consisting of alternating units of sand, clay, sandstone, dolomite, and limestone that gradually thicken and dip gently to the southeast. The stream-aquifer system consists of carbonate (limestone and dolomite) and elastic sediments, which define...
Water-level changes in the High Plains Aquifer: Predevelopment to 1994
Jack T. Dugan, Jennifer B. Sharpe
1996, Water-Resources Investigations Report 95-4208
No abstract available....
A field test of electromigration as a method for remediating sulfate from shallow ground water
C. G. Patterson, D.D. Runnells
1996, Ground Water Monitoring and Remediation (16) 63-68
Eloctromigraiion offers a potential tool for remediating ground water contaminated with highly soluble components, such as Na+, Cl, NO3 and SO4−. A field experiment was designed to lest the efficacy of electromigration for preconcontrating dissolved SO42 in ground water associated with a fossil-fuel power plant. Two shallow wells, 25 feel apart (one...
Age of the Lospe Formation (early Miocene) and origin of the Santa Maria Basin, California. Petroleum source potential and thermal maturity of the Lospe Formation (lower Miocene) near Point Sal, onshore Santa Maria Basin, California. Obispo Formation, California; remobilized pyroclastic material
Richard G. Stanley, Samuel Y. Johnson, Carl C. Swisher III, Mark A. Mason, John D. Obradovich, Mary Lou Cotton, Mark V. Filewicz, David R. Vork, Mark J. Pawlewicz, Zenon C. Valin, Jean-Luc Schneider, Richard V. Fisher
1996, Bulletin 1995-M,N,O
No abstract available....
Coal resource regions in the conterminous United States
John K. Tully
1996, Open-File Report 96-279
No abstract available....
Chronology of Late Cretaceous igneous and hydrothermal events at the Golden Sunlight gold-silver breccia pipe, southwestern Montana
Ed DeWitt, Eugene E. Foord, Robert E. Zartman, Robert C. Pearson, Fess Foster
1996, Bulletin 2155
Gold mineralization at the Golden Sunlight breccia pipe, southwestern Montana, is related to emplacement of Late Cretaceous alkali-calcic rhyolite and subsequent collapse of the Belt Supergroup wallrock and rhyolite in the pipe. The pipe is inferred to grade downward into an alkalic porphyry molybdenum system. The pipe is cut by...
Geologic map of the Allentown East quadrangle, Lehigh, Northampton, and Bucks Counties, Pennsylvania
Avery A. Drake Jr.
1996, Open-File Report 96-22
No abstract available....
Geologic map of the Hamilton Buttes Quadrangle, southern Cascade Range, Washington
D. A. Swanson
1996, Open-File Report 96-16
Geologic map of the Island of Hawaii
E. W. Wolfe (compiler), Jean Morris
1996, IMAP 2524-A
Reconnaissance of volatile organic compounds in the subsurface at Rutgers University, Busch Campus, Piscataway Township, New Jersey
Vincent T. DePaul
1996, Open-File Report 95-729
During 1991-92, the U.S. Geological Survey conducted a hydrogeologic reconnaissance at a site near the Rutgers University, Busch Campus, Chemical Engineering building, C-Wing. Results of analyses of the soil-gas samples, which were collected at 43 locations, indicated the presence of volatile organic compounds, primarily carbon tetrachloride, near the C-Wing building...
Faults, lineaments, and earthquake epicenters digital map of the Pahute Mesa 30' x 60' quadrangle, Nevada
S.A. Minor, G. S. Vick, M. D. Carr, R. R. Wahl
1996, Open-File Report 96-262
This map database, identified as Faults, lineaments, and earthquake epicenters digital map of the Pahute Mesa 30' X 60' quadrangle, Nevada, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves...
Quality-assurance plan for water-resources activities of the U.S. Geological Survey in Idaho
F. A. Packard
1996, Open-File Report 95-755
To ensure continued confidence in its products, the Water Resources Division of the U.S. Geological Survey implemented a policy that all its scientific work be performed in accordance with a centrally managed quality-assurance program. This report establishes and documents a formal policy for current (1995) quality assurance within the Idaho...
Low-flow characteristics of streams in Maryland and Delaware
David H. Carpenter, Donald C. Hayes
1996, Water-Resources Investigations Report 94-4020
Hydrologic information on the variability of streamflow during low-flow periods is needed for the effective management of surface-water resources in Maryland and Delaware. Low-flow characteristics derived from streamflow under natural conditions are presented for 94 continuousrecord gaging stations in Maryland, Delaware, and surrounding States, and for 131 low-flow partial-record gaging...
Selected geohydrologic data from a regional aquifer-system analysis of the Northern Rocky Mountains intermontane basins in Idaho
M.A. Stone, D. J. Parliman, J.L. Schaefer
1996, Open-File Report 96-207
The U.S. Geological Survey began a regional aquifer-system analysis of the Northern Rocky Mountains of northern and central Idaho and western Montana in 1990. The analysis helped establish a regional framework of information for aquifers in about 70 ntermontane basins in an area of 80,000 square miles. In many areas,...
Neural network technique for merging radar and visible band images
George Lemeshewsky
1996, Open-File Report 96-301
