Publications
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Abstracts for the symposium on the application of neural networks to the earth sciences
Artificial neural networks are a group of mathematical methods that attempt to mimic some of the processes in the human mind. Although the foundations for these ideas were laid as early as 1943 (McCulloch and Pitts, 1943), it wasn't until 1986 (Rumelhart and McClelland, 1986; Masters, 1995) that applications to practical problems became possible. It is the acknowledged superiority of the human min
Authors
Donald A. Singer
Subsurface and petroleum geology of the southwestern Santa Clara Valley ("Silicon Valley"), California
Gravity anomalies, historical records of exploratory oil wells and oil seeps, new organic-geochemical results, and new stratigraphic and structural data indicate the presence of a concealed, oil-bearing sedimentary basin beneath a highly urbanized part of the Santa Clara Valley, Calif. A conspicuous isostatic-gravity low that extends about 35 km from Palo Alto southeastward to near Los Gatos refle
Authors
Richard G. Stanley, Robert C. Jachens, Paul G. Lillis, Robert J. McLaughlin, Keith A. Kvenvolden, Frances D. Hostettler, Kristin A. McDougall, Leslie B. Magoon
By
Energy and Minerals Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Groundwater and Streamflow Information Program, Central Energy Resources Science Center, Pacific Coastal and Marine Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Multielement geochemical dataset of surficial materials for the northern Great Basin
This report presents geochemical data generated during mineral and environmental assessments for the Bureau of Land Management in northern Nevada, northeastern California, southeastern Oregon, and southwestern Idaho, along with metadata and map representations of selected elements. The dataset presented here is a compilation of chemical analyses of over 10,200 stream-sediment and soil samples orig
Authors
Mary Jane Coombs, Boris B. Kotlyar, Steve Ludington, Helen W. Folger, Victor G. Mossotti
Distribution of high-temperature (>150 °C) geothermal resources in California
California contains, by far, the greatest geothermal generating capacity in the United States, and with the possible exception of Alaska, the greatest potential for the development of additional resources. California has nearly 2/3 of the US geothermal electrical installed capacity of over 3,000 MW. Depending on assumptions regarding reservoir characteristics and future market conditions, addition
Authors
John H. Sass, Susan S. Priest
Mineralogical characterization of strata of the Meade Peak phosphatic shale member of the Permian Phosphoria Formation: Channel and individual rock samples of measured section J and their relationship to measured sections A and B, central part of Rasmusse
The Permian Phosphoria Formation of southeastern Idaho hosts one of the largest phosphate deposits in the world. Despite the economic significance of this Formation, the fine-grained nature of the phosphorite has discouraged detailed mineralogical characterization and quantification studies. Recently, selenium and other potentially toxic trace elements in mine wastes have drawn increased attention
Authors
A. C. Knudsen, M. E. Gunter, J. R. Herring, R. I. Grauch
An interpretation of the 1996 aeromagnetic data for the Santa Cruz basin, Tumacacori Mountains, Santa Rita Mountains, and Patagonia Mountains, south-central Arizona
High resolution aeromagnetic survey data flown at 250 m above the terrain and 250 m line spacing over the Santa Cruz Valley and the surrounding Tumacacori, Patagonia, and Santa Rita Mountains has been interpreted by correlation of the magnetic anomaly field and various derivative maps with geologic maps. Measurements of in-situ magnetic properties of several of the map units determined whether or
Authors
Mark E. Gettings
Inventory of Neoproterozoic and Paleozoic strata in Sonora, Mexico
This compilation is an inventory of all known outcrops of Neoproterozoic and Paleozoic strata in Sonora, Mexico. We have not attempted an interpretation of the regional stratigraphic or structural setting of the strata. Brief summaries of the stratigraphic setting of the Sonora rocks are given in Poole and Hayes (1971), Rangin (1978), Stewart and others (1984, 1990), and Poole and Madrid (1986; 19
Authors
John H. Stewart, Forrest G. Poole
Historical trends in U.S. mineral statistics for selected non-ferrous metals
Production figures for selected nonferrous metals-aluminum (including bauxite and alumina), copper, lead, tin, titanium, and zinc-by the United States, as well as other statistics for these commodities, show strong volatility during 20th century. Major shifts were driven by the Great Depression and the two World Wars, but other major temporal changes are also noted that are not directly related to
Authors
David Z. Piper, Warren J. Nokleberg
Geologic map of the Corona North 7.5' quadrangle, Riverside and San Bernardino Counties, California
Open-File Report 02-22 contains a digital geologic map database of the Corona North 7.5’ quadrangle, Riverside and San Bernardino Counties, California that includes:
ARC/INFO (Environmental Systems Research Institute, http://www.esri.com) version 7.2.1 coverages of the various elements of the geologic map.
A Postscript file to plot the geologic map on a topographic base, and containing a Correlat
Authors
Douglas M. Morton, C. H. Gray, Kelly R. Bovard, Michael Dawson
Geologic map of the Corona South 7.5' quadrangle, Riverside and Orange counties, California
Open-File Report 01-021 contains a digital geologic map database of the Corona South 7.5’ quadrangle, Riverside 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 of Map Uni
Authors
C. H. Gray, Douglas M. Morton, F. Harold Weber, Kelly R. Bovard, Timothy O'Brien
Surficial geology along the Spokane River, Washington and its relationship to the metal content of sediments (Idaho-Washington stateline to Latah Creek confluence)
The purpose of this study is
1. to document the geographic distribution of Holocene (deposited in the last 11,000 years) sedimentary lithologies in and along the Spokane River,
2. to document the downstream variation of metal contents (especially lead [Pb] and zinc [Zn] ) by sedimentary lithology, and
3. to compare the metal contents of different sedimentary lithologies.
This data is used to gain
Authors
Stephen E. Box, John C. Wallis
Field-trip guide to the southeastern foothills of the Santa Cruz Mountains in Santa Clara County, California
This field trip is an introduction to the geology of the southeastern foothills of the Santa Cruz Mountains in southern Santa Clara County. Seven stops include four short hikes to access rock exposures and views of the foothills east of Loma Prieta Peak between Gilroy and San José. Field-trip destinations highlight the dominant rock types of the "Franciscan assemblage" including outcrops of serpen
Authors
Philip W. Stoffer, Paula Messina