Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2357
Geologic map of the Cucamonga Peak 7.5' quadrangle, San Bernardino County, California
Open-File Report OF 01-311 contains a digital geologic map database of the Cucamonga Peak 7.5’ quadrangle, San Bernardino County, California that includes:
1. ARC/INFO (Environmental Systems Research Institute, http://www.esri.com) version 7.2.1 coverages of the various elements of the geologic map
2. A PostScript file to plot the geologic map on a topographic base, and containing a Correlation o
Authors
D. M. Morton, J. C. Matti, Catherine Koukladas, P. M. Cossette
The Silent Canyon caldera — A three dimensional model as part of a Pahute Mesa - Oasis Valley, Nevada, hydrogeologic model
A 3-dimensional caldera model based on gravity inversion, drill-hole data, and geologic mapping offers the framework for a hydrogeologic evaluation of the Silent Canyon caldera in the central part of Pahute Mesa, Nevada.
It has been recognized for several decades that the central part of Pahute Mesa is the site of a buried caldera called the Silent Canyon caldera. Conceptually, the structural fra
Authors
Edwin H. McKee, Geoffery A. Phelps, Edward A. Mankinen
Geologic map of the Telegraph Peak 7.5' quadrangle, San Bernardino County, California
Open-File Report OF 01-293 contains a digital geologic map database of the Telegraph Peak 7.5’ quadrangle, San Bernardino County, California that includes:
ARC/INFO (Environmental Systems Research Institute, http://www.esri.com) version 7.2.1 double precision coverages of the various elements of the geologic map.
A PostScript file to plot the geologic map on a topographic base, and containing a C
Authors
D. M. Morton, M.O. Woodburne, J. H. Foster, Gregory Morton, P. M. Cossette
Geologic map and digital database of the San Rafael Mtn. 7.5-minute quadrangle, Santa Barbara County, California
Geologic mapping of the San Rafael Primitive Area (now the San Rafael Wilderness) by Gower and others (1966) and Vedder and others (1967) did not include all of the San Rafael Mtn. quadrangle, and the part that was mapped was done in reconnaissance fashion. To help resolve some of the structural and stratigraphic ambiguities of the earlier mapping and to complete the mapping of the quadrangle, add
Authors
John G. Vedder, Richard G. Stanley, S. E. Graham, Z. C. Valin
Shaded-relief and color shaded-relief maps of the Willamette Valley, Oregon
This Open-File Report is released as a digital map database. It includes PostScript plot files that contain images of the map sheets; the images also contain a brief explanation describing the geology and physiography of the study area. The digital map database is a compilation of newly published 10-m digital-elevation-model (DEM) data for western Oregon and represents the physiography of the Will
Authors
R. W. Givler, Ray E. Wells
Petrography and physical properties of selected rock types associated with the Hayward Fault, California
This report provides brief petrographic descriptions of rock samples collected from the vicinity of the Hayward Fault, Northern California. Two groups of rock samples are represented here:
A set of six samples that were used for laboratory measurements of P- and S-wave velocity , strength, density, and porosity. This group was examined using standard petrographic microscope, scanning electron mic
Authors
Diane E. Moore, David A. Ponce
Eagle Mountain Mine: Geology of the former Kaiser Steel Operation in Riverside County, California
This investigation of the Eagle Mountain Mine area, though cursory, revealed new structural, alteration, and stratigraphic relations. Eagle Mountain ores were previously an important source of iron to the western U. S. Ore (where fresh) is magnetite-pyrite rock forming two stratabound horizons virtually continuous for 11 km.
Gneissic basement rocks are overlain by two sedimentary units, separated
Authors
Eric R. Force
Map showing plutons and accreted terranes of the Sierra Nevada, California, with a tabulation of U/Pb isotopic ages
No abstract available.
Authors
William P. Irwin, Joseph L. Wooden
A simplified economic filter for open-pit mining and heap-leach recovery of copper in the United States
Determining the economic viability of mineral deposits of various sizes and grades is a critical task in all phases of mineral supply, from land-use management to mine development. This study evaluates two simple tools for estimating the economic viability of porphyry copper deposits mined by open-pit, heap-leach methods when only limited information on these deposits is available. These two metho
Authors
Keith R. Long, Donald A. Singer
Publications of the Western Earth Surface Processes Team 2000
The Western Earth Surface Processes Team (WESP) of the U.S. Geological Survey (USGS) conducts geologic mapping and related topical earth science studies in the western United States. This work is focused on areas where modern geologic maps and associated earth-science data are needed to address key societal and environmental issues such as ground-water quality, potential geologic hazards, and land
Authors
Charles L. Powell, Paul Stone
Geologic map of the Lakeview 7.5' quadrangle, Riverside County, California
This Open-File Report contains a digital geologic map and map database of the Lakeview 7.5' quadrangle, Riverside County, California, that includes:
1. ARC/INFO (Environmental Systems Research Institute) version 7.2.1 double-precision coverages of the various elements of the geologic map
2. A Postscript file to plot the geologic map on a topographic base, and containing a Correlation of Map Unit
Authors
Douglas M. Morton, Jonathan C. Matti
Use of structural geology in exploration for and mining of sedimentary rock-hosted Au deposits
Structural geology is an important component in regional-, district- and orebody-scale exploration and development of sedimentary rock-hosted Au deposits. Identification of timing of important structural events in an ore district allows analysis and classification of fluid conduits and construction of genetic models for ore formation. The most practical uses of structural geology deal with measure
Authors
Stephen G. Peters