Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2350
Helicopter Electromagnetic and Magnetic Geophysical Survey Data for Portions of the North Platte River and Lodgepole Creek, Nebraska, June 2008
This report is a release of digital data from a helicopter electromagnetic and magnetic survey that was conducted during June 2008 in areas of western Nebraska as part of a joint hydrologic study by the North Platte Natural Resource District, South Platte Natural Resource District, and U.S. Geological Survey. The objective of the contracted survey, conducted by Fugro Airborne, Ltd., was to improve
Authors
Bruce D. Smith, Jared D. Abraham, James C. Cannia, Patricia Hill
A preliminary, full spectrum, magnetic anomaly grid of the United States with improved long wavelengths for studying continental dynamics: A website for distribution of data
Under an initiative started by Thomas G. Hildenbrand of the U.S. Geological Survey, we have improved the long-wavelength (50-2,500 km) content of the regional magnetic anomaly compilation for the conterminous United States by utilizing a nearly homogeneous set of National Uranium Resource Evaluation (NURE) magnetic surveys flown from 1975 to 1981. The surveys were flown in quadrangles of 2 deg of
Authors
D. Ravat, Carol A. Finn, P. Hill, R. Kucks, J. Phillips, R. Blakely, C. Bouligand, T. Sabaka, A. Elshayat, A. Aref, E. Elawadi
Report from Ground Zero: How geoscientists aid in the aftermath of environmental disasters
People around the world remember when they first learned of the attacks on New York City’s World Trade Center towers on Sept. 11, 2001. For me, the memories are vivid — my feelings of shock, horror and sadness were similarly etched on the faces of all the attendees of a mining and the environment workshop in Buenos Aires, Argentina, where I was speaking. At that time, I had no idea that our small
Authors
Geoffrey S. Plumlee
Deep Resistivity Structure of Mid Valley, Nevada Test Site, Nevada
The U.S. Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) at their Nevada Site Office (NSO) are addressing ground-water contamination resulting from historical underground nuclear testing through the Environmental Management (EM) program and, in particular, the Underground Test Area (UGTA) project.
From 1951 to 1992, 828 underground nuclear tests were conducted
Authors
Erin L. Wallin, Brian D. Rodriguez, Jackie M. Williams
Hydrogeology of the Columbia River Basalt Group in the northern Willamette Valley
No abstract available.
Authors
W Burt, Terrence D. Conlon, T.L. Tolan, R. E. Wells, J Melady
Inversion of multichannel geophysical data with projected kernels
Statistical de‐noising methods such as Principal Component Analysis modify data in a way not constrained by physics. In much the same way as frequency‐filtered data must incorporate altered frequency content into numerical interpretation, so must statistically rotated data include the rotation operator in inversion processes. We propose a method of accounting for statistical reduction of data in n
Authors
M. Andy Kass, Trevor P. Irons, Yaoguo Li
Preliminary Geologic Map of the Buxton 7.5' Quadrangle, Washington County, Oregon
This map, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Buxton 7.5-minute quadrangle. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The scale of the source maps limits the
Authors
Philip A. Dinterman, Alison R. Duvall
Geologic Map of the Carlton Quadrangle, Yamhill County, Oregon
The Carlton, Oregon, 7.5-minute quadrangle is located in northwestern Oregon, about 35 miles (57 km) southwest of Portland. It encompasses the towns of Yamhill and Carlton in the northwestern Willamette Valley and extends into the eastern flank of the Oregon Coast Range. The Carlton quadrangle is one of several dozen quadrangles being mapped by the U.S. Geological Survey (USGS) and the Oregon Depa
Authors
Karen L. Wheeler, Ray E. Wells, Joseph M. Minervini, Jessica L. Block
Quantifying the undiscovered geothermal resources of the United States
In 2008, the U.S. Geological Survey (USGS) released summary results of an assessment of the electric power production potential from the moderate- and high-temperature geothermal resources of the United States (Williams et al., 2008a; USGS Fact Sheet 2008-3082; http://pubs.usgs.gov/fs/2008/3082). In the assessment, the estimated mean power production potential from undiscovered geothermal resource
Authors
Colin F. Williams, Marshall J. Reed, Jacob DeAngelo, S. Peter Galanis
Magma evolution and ascent at the craters of the moon and neighboring volcanic fields, southern Idaho, USA: Implications for the evolution of polygenetic and monogenetic volcanic fields
The evolution of polygenetic and monogenetic volcanic fields must reflect differences in magma processing during ascent. To assess their evolution we use thermobarometry and geochemistry to evaluate ascent paths for neighboring, nearly coeval volcanic fields in the Snake River Plain, in south-central Idaho, derived from (1) dominantly Holocene polygenetic evolved lavas from the Craters of the Moon
Authors
Keith D. Putirka, Mel A. Kuntz, Daniel M. Unruh, Nitin Vaid
Digital coordinates and age for 3,869 foraminifer samples collected by Chevron Petroleum geologists in Washington and Oregon
The general location and age of more than 33,500 mostly foraminifer samples from Chevron Petroleum Company surface localities in California were provided by Brabb and Parker (2003, 2005). Malmborg and others (2008) provided digital latitude, longitude, and age for more than 13,000 of these samples. We provide here for the first time the digital latitude, longitude, and age for nearly 4,000 Chevron
Authors
William B. West, Earl E. Brabb, William T. Malmborg, John M. Parker
Foreword: A virtual congress on palaeolimnology—Palaeolimnological proxies as tools for environmental reconstruction in fresh water
No abstract available.
Authors
Krisztina Buczkó, János Korponai, Judit Padisák, Scott W. Starratt