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Preliminary digital map of cryptocrystalline occurrences in northern Nevada
Lorre A. Moyer
1999, Open-File Report 99-523
The purpose was to identify potential cryptocrystalline material sources for tools used by indigenous people of the northern Nevada portion of the Great Basin. Cryptocrystalline occurrence data combed from the U.S. Geological Survey's Mineral Resources Data System (MRDS, 1995) were combined with sites described in Nevada rockhound guides and entered...
Ground-water data in Orange County and adjacent counties, Texas, 1985-90
Mark C. Kasmarek
1999, Open-File Report 99-603
The lower unit of the Chicot aquifer is a major source of freshwater for Orange County, Texas. In 1989, the average rate of ground-water withdrawal from the lower unit of the Chicot aquifer in Orange County for municipal and industrial use was 13.8 million gallons per day, a substantial decrease...
Precipitation, atmospheric deposition, streamflow, and water-quality data from selected sites in the city of Charlotte and Mecklenburg County, North Carolina, 1997–98
Kathleen M. Sarver, W. F. Hazell, J. B. Robinson
1999, Open-File Report 99-273
Precipitation data were collected at 46 precipitation sites and 3 atmospheric deposition sites, and hydrologic data were collected at 6 stream sites in the vicinity of Charlotte and Mecklenburg County, North Carolina, from July 1997 through September 1998. Data were collected to identify the type, concentration, and amount of nonpoint-source...
Index of stations: Surface-water data-collection network of Texas, September 1998
1999, Open-File Report 99-604
As of September 30, 1998, the surface-water data-collection network of Texas (table 1) included 313 continuous-recording streamflow stations (D), 22 gage-height record only stations (G), 23 crest-stage partial-record stations (C), 39 flood-hydrograph partial-record stations (H), 25 low-flow partial-record stations (L), 1 continuous-recording temperature station (M1), 25 continuous-recording temperature and conductivity...
Surficial geology and distribution of post-impoundment sediment of the western part of Lake Mead based on a sidescan sonar and high-resolution seismic-reflection survey
David C. Twichell, VeeAnn A. Cross, Mark J. Rudin, Kenneth F. Parolski
1999, Open-File Report 99-581
Sidescan sonar imagery and high-resolution seismic-reflection profiles were collected in Las Vegas Bay and Boulder Basin of Lake Mead to determine the surficial geology as well as the distribution and thickness of sediment that has accumulated in these areas of the lake since the completion of Hoover Dam in 1935...
A total petroleum system of the Browse Basin, Australia; Late Jurassic, Early Cretaceous-Mesozoic
M.G. Bishop
1999, Open-File Report 99-50-I
The Browse Basin Province 3913, offshore northern Australia, contains one important petroleum system, Late Jurassic, Early Cretaceous-Mesozoic. It is comprised of Late Jurassic through Early Cretaceous source rocks deposited in restricted marine environments and various Mesozoic reservoir rocks deposited in deep-water fan to fluvial settings. Jurassic age intraformational shales and...
Digital mining claim density map for federal lands in Arizona: 1996
Paul C. Hyndman, Harry W. Campbell
1999, Open-File Report 99-406
This report describes a digital map generated by the U.S. Geological Survey (USGS) to provide digital spatial mining claim density information for federal lands in Arizona as of March 1997. Mining claim data is earth science information deemed to be relevant to the assessment of historic, current, and future ecological,...
Digital Map of Surficial Geology, Wetlands, and Deepwater Habitats, Coeur d'Alene River Valley, Idaho
Arthur A. Bookstrom, Stephen E. Box, Berne L. Jackson, Theodore R. Brandt, Pamela D. Derkey, Steven R. Munts
1999, Open-File Report 99-548
The Coeur d'Alene (CdA) River channel and its floodplain in north Idaho are mostly covered by metal-enriched sediments, partially derived from upstream mining, milling and smelting wastes. Relative to uncontaminated sediments of the region, metal-enriched sediments are highly enriched in silver, lead, zinc, arsenic, antimony and mercury, copper, cadmium, manganese,...
Characteristics of the Alaskan 1-Km Advanced Very High Resolution Radiometer data sets used for analysis of vegetation biophysical properties
Carl J. Markon
1999, Open-File Report 99-401
In this study, data characteristics for composited, multitemporal Advanced Very High Resolution Radiometer data sets for Alaska were assessed for a 7- year period from 1991 to 1997. This involved consideration of the satellite sensors used, data processing performed, and data set compilation, along with an analysis of acquisition date,...
Preliminary aeromagnetic anomaly map of California
Carter W. Roberts, Robert C. Jachens
1999, Open-File Report 99-440
The magnetization in crustal rocks is the vector sum of induced in minerals by the Earth’s present main field and the remanent magnetization of minerals susceptible to magnetization (chiefly magnetite) (Blakely, 1995). The direction of remanent magnetization acquired during the rock’s history can be highly variable. Crystalline rocks generally contain...
Mapping the glacial geology of the Central Great Lakes region in three dimensions: A model for state-federal cooperation
Richard C. Berg, Ned K. Bleuer, Berwyn E. Jones, Kevin A. Kincare, Richard R. Pavey, Byron D. Stone
1999, Open-File Report 99-349
Planners need to evaluate complex and competing public-policy options for managing water, land, and biological resources; they must ensure economic growth, meet the needs of an increasing population, assess hazards, and manage the environment in a sustainable manner. The State Geological Surveys of Illinois, Indiana, Michigan, and Ohio and the...