Merged aeroradiometric data for Alaska: A web site for distribution of gridded data and plot files
R. W. Saltus, F. E. Riggle, B. T. Clark, P. L. Hill
1999, Open-File Report 99-16
The National Uranium Resource Evaluation (NURE) program was conducted by the U.S. Government between 1974 and 1983. The NURE program was administered by the Grand Junction, CO, office of the Department of Energy. The program included airborne gamma-ray spectrometry and magnetic data collection as well as extensive geochemical sample collection...
Historical trends of U.S. mineral statistics for gold, silver, and the rare earth elements
D.Z. Piper, E.B. Amey, H.E. Hilliard, J.B. Hedrick, N. Galtseva, W. J. Nokleberg
1999, Open-File Report 99-39
Principal facts for about 500 gravity stations in the vicinity of Amargosa Desert and Pahrump Valley, California and Nevada
R. L. Morin, B. A. Chuchel, R.J. Blakely
1999, Open-File Report 99-31
Trends in base flows and extreme flows in the Beaver Kill Basin, Catskill Mountains, New York, 1915-94
Barry P. Baldigo
1999, Open-File Report 98-65
Long-term records from five streamflow-gaging stations within and near the 300-square mile Beaver Kill Basin were analyzed to determine whether construction and presence of New York State Route 17 (NY 17), which was completed in the late 1960's, could have altered hydrologic processes in the basin and thereby adversely affected...
Regional geologic map of San Andreas and related faults in Carrizo Plain, Temblor, Caliente and La Panza Ranges and vicinity, California: A digital database
T. W. Dibblee, S. E. Graham, T. M. Mahony, J. L. Blissenbach, J. J. Mariant, C. M. Wentworth
1999, Open-File Report 99-14
This Open-File Report is a digital geologic map database. The report serves to introduce and describe the digital data. There is no paper map included in the Open-File Report. The report includes PostScript and PDF plot files that can be used to plot images of the geologic map sheet and...
Alaska resource data file: Karluk quadrangle
S. H. Pilcher
1999, Open-File Report 99-42
No abstract available....
An Overview of the Factors Involved in Evaluating the Geochemical Effects of Highway Runoff on the Environment
Owen P. Bricker
1999, Open-File Report 98-630
Materials washed by rain and snowmelt from highways into adjacent surface waters, ground waters, and ecosystems can pollute water and affect biota. To understand the chemical behavior of any one of these materials and its effects on the environment requires knowledge of the chemistry of the material and how it...
Aeromagnetic survey in Wisconsin 1997-98; digital data files
D. L. Daniels, S. W. Nicholson, W.F. Cannon
1999, Open-File Report 99-28
No abstract available....
Regional geochemical results from the analyses of rock, water, soil, stream sediment and vegetation samples; Fortymile River watershed, East-Central Alaska
J.G. Crock, L. P. Gough, R. B. Wanty, W. C. Day, Bronwen Wang, B. M. Gamble, M. Henning, Z. A. Brown, A. L. Meier
1999, Open-File Report 99-33
Alaska resource data file: Trinity Islands quadrangle
S. H. Pilcher
1999, Open-File Report 99-41
No abstract available....
HYPOELLIPSE; a computer program for determining local earthquake hypocentral parameters, magnitude, and first-motion pattern
John C. Lahr
1999, Open-File Report 99-23
This report provides Fortran source code and program manuals for HYPOELLIPSE, a computer program for determining hypocenters and magnitudes of near regional earthquakes and the ellipsoids that enclose the 68-percent confidence volumes of the computed hypocenters. HYPOELLIPSE was developed to meet the needs of U.S. Geological Survey (USGS) scientists studying...
Lithology and aggregate quality attributes for the digital geologic map of Colorado
Daniel H. Knepper, Gregory N. Green, William H. Langer
1999, Open-File Report 99-29
This geologic map was prepared as a part of a study of digital methods and techniques as applied to complex geologic maps. The geologic map was digitized from the original scribe sheets used to...
Alaska resource data file: Afognak quadrangle
S. H. Pilcher
1999, Open-File Report 99-40
No abstract available....
Alaska resource data file: Kodiak quadrangle
S. H. Pilcher
1999, Open-File Report 99-43
No abstract available....
Geologic map of the Hart Peak quadrangle, California and Nevada: A digital database
Jane E. Nielson, Ryan D. Turner, David R. Bedford
1999, Open-File Report 99-34
The Hart Peak 1:24,000-scale quadrangle is located about 12 km southwest of Searchlight, Nevada, comprehending the eastern part of the Castle Peaks, California, and most of the Castle Mountains and the northwestern part of the Piute Range, in California and Nevada. The Castle Peaks area constitutes the northeasternmost part of...
An interactive computer program to extrapolate the clay fraction distributions of truncated grain-size data
L.J. Poppe, A.H. Eliason
1999, Open-File Report 99-27
Preliminary geologic map of the San Guillermo Mountain Quadrangle, Ventura County, California
S.A. Minor
1999, Open-File Report 99-32
New 1:24,000-scale geologic mapping in the Cuyama 30' x 60' quadrangle, in support of the USGS Southern California Areal Mapping Project (SCAMP), is contributing to a more complete understanding of the stratigraphy, structure, and tectonic evolution of the complex junction area between the NW-striking Coast Ranges and EW-striking western Transverse...
Calculation of coal resources using ARC/INFO and Earth Vision; methodology for the National Coal Resource Assessment
L.N. Roberts, L.R. Biewick
1999, Open-File Report 99-5
This report documents a comparison of two methods of resource calculation that are being used in the National Coal Resource Assessment project of the U.S. Geological Survey (USGS). Tewalt (1998) discusses the history of using computer software packages such as GARNET (Graphic Analysis of Resources using Numerical Evaluation Techniques), GRASS...
Determination of chemical-constituent loads during base-flow and storm-runoff conditions near historical mines in Prospect Gulch, upper Animas River watershed, southwestern Colorado
Laurie Wirt, K.J. Leib, D. J. Bove, M.A. Mast, J. B. Evans, G.P. Meeker
1999, Open-File Report 99-159
Prospect Gulch is a major source of iron, aluminum, zinc, and other metals to Cement Creek. Information is needed to prioritize remediation and develop strategies for cleanup of historical abandoned mine sites in Prospect Gulch. Chemical-constituent loads were determined in Prospect Gulch, a high-elevation alpine stream in southwestern Colorado that is affected by natural...
Adsorption capabilities of selected clinoptilolite-rich rocks as it relates to mine drainage remediation
J.S. Gilbert, P. M. O’Meara, J.G. Crock, T.R. Wildeman, G. A. Desborough
1999, Open-File Report 99-17
Borehole-geophysical characterization of a fractured-bedrock aquifer, Rye, New Hampshire
C. D. Johnson, A.H. Dunstan, Thomas J. Mack, J.W. Lane Jr.
1999, Open-File Report 98-558
Borehole geophysical logs collected from six wells were analyzed to characterize a high-yield bedrock aquifer in the Town of Rye, New Hampshire. Video camera, caliper, fluid temperature and conductivity, natural gamma, and deviation logs were used to identify and characterize the fractured bedrock. More advanced geophysical tools included acoustic...
Geologic map of the Little Black Canyon Quadrangle, Malheur County, Oregon
James G. Evans, G. Benjamin Binger
1999, Open-File Report 98-493
Summary and evaluation of pesticides in field blanks collected for the National Water-Quality Assessment Program, 1992-95
Jeffrey D. Martin, Robert J. Gilliom, Terry L. Schertz
1999, Open-File Report 98-412
Field blanks are quality-control samples used to assess contamination in environmental water samples. Contamination is the unintentional introduction of a chemical (pesticides in this instance) into an environmental water sample from sources such as inadequately cleaned equipment, dirty hands, dust, rain, or fumes. Contamination causes a positive bias in analytical...
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of arsenic and selenium in water and sediment by graphite furnace atomic absorption spectrometry
Sandra R. Jones, John R. Garbarino
1999, Open-File Report 98-639
Graphite furnace-atomic absorption spectrometry (GF-AAS) is a sensitive, precise, and accurate technique that can be used to determine arsenic and selenium in samples of water and sediment. The GF-AAS method has been developed to replace the hydride generation-atomic absorption spectrometry (HG-AAS) methods because the method detection limits are similar, bias...
The oil and gas resource potential of the Arctic National Wildlife Refuge 1002 area, Alaska
ANWR Assessment Team
1999, Open-File Report 98-34
In anticipation of the need for scientific support for policy decisions and in light of the decade-old perspective of a previous assessment, the USGS has completed a reassessment of the petroleum potential of the ANWR 1002 area. This was a comprehensive study by a team of USGS scientists in collaboration...
