Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2533
Quaternary loess-Paleosol sequences as examples of climate-driven sedimentary extremes Quaternary loess-Paleosol sequences as examples of climate-driven sedimentary extremes
No abstract available.
Authors
Daniel R. Muhs, E. Arthur Bettis
Modeling precipitation and sorption of elements during mixing of river water and porewater in the Coeur d'Alene River basin Modeling precipitation and sorption of elements during mixing of river water and porewater in the Coeur d'Alene River basin
Reddish brown flocs form along the edge of the Coeur d'Alene River when porewater drains into river water during the annual lowering of water level in the basin. The precipitates are efficient scavengers of dissolved elements and have characteristics that may make metals associated with them bioavailable. This work characterizes the geochemistry of the porewater and models the formation...
Authors
Laurie S. Balistrieri, S. E. Box, J.W. Tonkin
Debris-flow deposits and watershed erosion rates near southern Death Valley, CA, United States Debris-flow deposits and watershed erosion rates near southern Death Valley, CA, United States
No abstract available.
Authors
K. M. Schmidt, C.M. Menges
Is a powerful quake likely to strike in the next 30 years? Is a powerful quake likely to strike in the next 30 years?
No abstract available.
Authors
Andrew J. Michael, Stephanie L. Ross, Robert W. Simpson, Mary Lou Zoback, David P. Schwartz, Michael L. Blanpied
Isotopes and ages in the northern Peninsular Ranges batholith, southern California Isotopes and ages in the northern Peninsular Ranges batholith, southern California
Strontium, oxygen and lead isotopic and rubidium-strontium geochronologic studies have been completed on Cretaceous and Jurassic (?) granitic rock samples from the northern Peninsular Ranges batholith in southern California. Many of these samples were collected systematically and studied chemically by A. K. Baird and colleagues (Baird and others, 1979). The distribution of these granitic...
Authors
Ronald W. Kistler, Joseph L. Wooden, Douglas M. Morton
Intrusive rock database for the Digital Geologic Map of Utah Intrusive rock database for the Digital Geologic Map of Utah
Digital geologic maps offer the promise of rapid and powerful answers to geologic questions using Geographic Information System software (GIS). Using modern GIS and database methods, a specialized derivative map can be easily prepared. An important limitation can be shortcomings in the information provided in the database associated with the digital map, a database which is often based...
Authors
C.J. Nutt, Steve Ludington
Platinum-group element mineralization in the Stillwater Complex, Montana Platinum-group element mineralization in the Stillwater Complex, Montana
No abstract available.
Authors
Michael L. Zientek, Roger W. Cooper, Sam R. Corson, E. P. Geraghty
Origin of the Lisburne Hills–Herald Arch structural belt: Stratigraphic, structural, and fission-track evidence from the Cape Lisburne area, northwestern Alaska Origin of the Lisburne Hills–Herald Arch structural belt: Stratigraphic, structural, and fission-track evidence from the Cape Lisburne area, northwestern Alaska
No abstract available.
Authors
Thomas E. Moore, T.A. Dumitru, K.E. Adams, S.N. Witebsky, A. G. Harris
What governments are doing to reduce the consequences of landslides What governments are doing to reduce the consequences of landslides
No abstract available.
Authors
E. E. Brabb, D. G. Howell, W. R. Cotton
Rationale and operational plan to upgrade the U.S. gravity database Rationale and operational plan to upgrade the U.S. gravity database
A concerted effort is underway to prepare a substantially upgraded digital gravity anomaly database for the United States and to make this data set and associated usage tools available on the internet. This joint effort, spearheaded by the geophysics groups at the National Imagery and Mapping Agency (NIMA), University of Texas at El Paso (UTEP), U.S. Geological Survey (USGS), and...
Authors
Thomas G. Hildenbrand, Allen Briesacher, Guy Flanagan, William J. Hinze, A. M. Hittelman, Gordon R. Keller, R.P. Kucks, Donald Plouff, Walter Roest, John Seeley, David A. Stith, Mike Webring
Shaded relief, topographic slope, and land use planning in the Los Altos Hills area, California - an example of the use of elevation data Shaded relief, topographic slope, and land use planning in the Los Altos Hills area, California - an example of the use of elevation data
No abstract available.
Authors
Suzanna K. Brooks, Arthur H. Lachenbruch, Carl M. Wentworth
Preliminary report on mercury geochemistry of placer gold dredge tailings, sediments, bedrock, and waters in the Clear Creek restoration area, Shasta County, California Preliminary report on mercury geochemistry of placer gold dredge tailings, sediments, bedrock, and waters in the Clear Creek restoration area, Shasta County, California
Clear Creek, one of the major tributaries of the upper Sacramento River, drains the eastern Trinity Mountains. Alluvial plain and terrace gravels of lower Clear Creek, at the northwest edge of the Sacramento Valley, contain placer gold that has been mined since the Gold Rush by various methods including dredging. In addition, from the 1950s to the 1980s aggregate-mining operations...
Authors
Roger P. Ashley, James J. Rytuba, Ronald Rogers, Boris B. Kotlyar, David Lawler