Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2354
Digital geologic map of part of the Thompson Falls 1:100,000 quadrangle, Idaho
The geology of the Thompson Falls 1:100,000 quadrangle, Idaho was compiled by Reed S. Lewis in 1997 onto a 1:100,000-scale greenline mylar of the topographic base map for input into a geographic information system (GIS). The resulting digital geologic map GIS can be queried in many ways to produce a variety of geologic maps. Digital base map data files (topography, roads, towns, rivers and lakes,
Authors
Reed S. Lewis, Pamela D. Derkey
Preliminary digital map of cryptocrystalline occurrences in northern Nevada
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 into a geographic information system (GIS). The
Authors
Lorre A. Moyer
Field trip guide to selected studies of the Southwest Mineral and Environmental Investigations Project in southeastern Arizona
The Southwest Mineral and Environmental Investigations Project is designed to address issues raised by rapid urban development in the basins of the southwestern U.S. These issues require objective geoscientific data that can be used by land managers and stakeholders to develop informed land and water use strategies. The project integrates new and existing geologic, geophysical, and geochemical dat
Authors
B. B. Houser, M. E. Gettings, M.W. Bultman, Floyd Gray, K.R. Caruthers, D.M. Hirschberg
Digital mining claim density map for federal lands in Arizona: 1996
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, economic, and social systems.
There is no paper map included in this Open-Fil
Authors
Paul C. Hyndman, Harry W. Campbell
Preliminary aeromagnetic anomaly map of California
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 sufficient magnetic minerals to cause variatio
Authors
Carter W. Roberts, Robert C. Jachens
Sand dunes of the northern Great Plains of Canada and the United States
No abstract available.
Authors
D.R. Muhs, S.A. Wolfe
Sedimentation and bathymetry changes in Suisun Bay: 1867-1990
Understanding patterns of historical erosion and deposition in San Francisco Bay is crucial in managing such issues as locating deposits of sediment-associated contaminants, and the restoration of wetland areas. These problems were addressed by quantitatively examining historical hydrographic surveys. The data from five hydrographic surveys, made from 1867 to 1990, were analyzed using surface mode
Authors
Karen Cappiella, Chris Malzone, Richard Smith, Bruce Jaffe
Hydrogeology of the unsaturated zone, North Ramp area of the Exploratory Studies Facility, Yucca Mountain, Nevada
Yucca Mountain, in southern Nevada, is being investigated by the U.S. Department of Energy as a potential site for a repository for high-level radioactive waste. This report documents the results of surface-based geologic, pneumatic, hydrologic, and geochemical studies conducted during 1992 to 1996 by the U.S. Geological Survey in the vicinity of the North Ramp of the Exploratory Studies Facility
Authors
Edward M. Kwicklis, Daniel C. Gillies
Geological map of Washington - Southwest quadrant (digital edition)
This report comprises digital spatial data that constitute a partial transcription of the 1:250,000-scale Geologic map of Washington - southwest quadrant (Walsh and others, 1987); digital base material, symbolsets, and ARC Macro Language (AML) procedures to create a geologic map on a shaded-relief base from the digital spatial data; and Postscript and RTL plotfiles for such a geologic map.
The di
Authors
Timothy J. Walsh, Michael A. Korosec, William M. Phillips, Robert L. (Josh) Logan, Henry W. Schasse, Karen L. Meagher, Ralph A. Haugerud
Digital elevation model (DEM) of Cascadia, latitude 39N-53N, longitude 116W-133W
This report contains a 250-meter digital elevation model (DEM) for Cascadia (latitude 39N - 53N, longitude 116W - 133W), a region that encompasses the Cascade volcanic arc, the Cascadia subduction zone, and the Juan de Fuca Ridge system. The DEM is distributed as file cascdem.tar.gz (39 MB; 78MB uncompressed).
Authors
Ralph A. Haugerud
Assessing the influence of reacting pyrite and carbonate minerals on the geochemistry of drainage in the Coeur d'Alene mining district
The relative abundance of minerals that react to generate or consume acid in mineralized areas is critical in determining the quality of water draining from such areas. This work examines the fundamental reactions that influence the pH and composition of drainage from mine adits and tailings piles. We construct triangle diagrams that predict stoichiometric relationships between concentrations of d
Authors
Laurie S. Balistrieri, S. E. Box, A. A. Bookstrom, M. Ikramuddin
Trace-element geochemistry of metabasaltic rocks from the Yukon-Tanana Upland and implications for the origin of tectonic assemblages in east-central Alaska
We present major- and trace- element geochemical data for 27 amphibolites and six greenstones from three structural packages in the Yukon-Tanana Upland of east-central Alaska: the Lake George assemblage (LG) of Devono-Mississippian augen gneiss, quartz-mica schist, quartzite, and amphibolite; the Taylor Mountain assemblage (TM) of mafic schist and gneiss, marble, quartzite, and metachert; and the
Authors
Cynthia Dusel-Bacon, K.M. Cooper