Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2354
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
High-Resolution Aeromagnetic Survey To Image Shallow Faults, Poncha Springs and Vicinity, Chaffee County, Colorado
High-resolution aeromagnetic data were acquired over the town of Poncha Springs and areas to the northwest to image faults, especially where they are concealed. Because this area has known hot springs, faults or fault intersections at depth can provide pathways for upward migration of geothermal fluids or concentrate fracturing that enhances permeability. Thus, mapping concealed faults provides a
Authors
V. J. S. Grauch, Benjamin J. Drenth
Geophysical Studies in the Vicinity of the Warner Mountains and Surprise Valley, Northeast California, Northwest Nevada, and Southern Oregon
From May 2006 to August 2007, the U.S. Geological Survey (USGS) collected 793 gravity stations, about 102 line-kilometers of truck-towed and ground magnetometer data, and about 325 physical-property measurements in northeastern California, northwestern Nevada, and southern Oregon. Gravity, magnetic, and physical-property data were collected to study regional crustal structures and geology as an ai
Authors
David A. Ponce, Jonathan M. G. Glen, Anne E. Egger, Claire Bouligand, Janet T. Watt, Robert L. Morin
Preliminary Geomorphic Map of the Kitsap Peninsula, Washington
The Kitsap Peninsula, in the center of the Puget Lowland of Washington State, has been glaciated repeatedly during the last 2 million years. This geologic history is significant to our understanding of crustal deformation, ground- and surface-water resources, the distribution of fishes, and other topics. Recent high-resolution lidar (LIght Detection And Ranging; also known as airborne laser swath
Authors
Ralph A. Haugerud
Results and Interpretations of U.S. Geological Survey Data Collected In and Around the Tuba City Open Dump, Arizona
This Open-File Report was originally an Administrative Report presentation to the Bureau of Indian Affairs based on U.S. Geological Survey data that has been collected and presented in four previous reports (Open-File Reports 2009-1020, 2008-1380, and 2008-1374, and an Administrative Report on geophysical data). This presentation was given at a technical meeting requested by the BIA on March 3 and
Authors
Raymond H. Johnson, James K. Otton, Robert Horton
A lacustrine carbonate record of Holocene seasonality and climate
Annually laminated (varved) Holocene sediments from Derby Lake, Michigan, display variations in endogenic calcite abundance reflecting a long-term (millennial-scale) decrease in burial punctuated with frequent short-term (decadal-scale) oscillations due to carbonate dissolution. Since 6000 cal yr B.P., sediment carbonate abundance has followed a decreasing trend while organic-carbon abundance has
Authors
Chad A. Wittkop, Jane L. Teranes, Walter E. Dean, Thomas P. Guilderson
Geophysical delineation of Mg-rich ultramafic rocks for mineral carbon sequestration
This presentation covers three general topics: (1) description of a new geologic compilation of the United States that shows the location of magnesium-rich ultramafic rocks in the conterminous United States; (2) conceptual illustration of the potential ways that ultramafic rocks could be used to sequester carbon dioxide; and (3) description of ways to use geophysical data to refine and extend the
Authors
Anne E. McCafferty, Bradley S. Van Gosen, Sam C. Krevor, Chris R. Graves
Gravity and Magnetic Investigations of the Mojave National Preserve and Adjacent Areas, California and Nevada
Gravity and aeromagnetic data provide the underpinnings of a hydrogeologic framework for the Mojave National Preserve by estimating the thickness of Cenozoic deposits and locating inferred structural features that influence groundwater flow. An inversion of gravity data indicates that thin (
Authors
V. E. Langenheim, S. Biehler, R. Negrini, K. Mickus, D. M. Miller, R. J. Miller
The Boring Volcanic Field of the Portland-Vancouver area, Oregon and Washington: Tectonically anomalous forearc volcanism in an urban setting
More than 80 small volcanoes are scattered throughout the Portland-Vancouver metropolitan area of northwestern Oregon and southwestern Washington. These volcanoes constitute the Boring Volcanic Field, which is centered in the Neogene Portland Basin and merges to the east with coeval volcanic centers of the High Cascade volcanic arc. Although the character of volcanic activity is typical of many mo
Authors
Russell C. Evarts, Richard M. Conrey, Robert J. Fleck, Jonathan T. Hagstrum
Analytical Results for Agricultural Soils Samples from a Monitoring Program Near Deer Trail, Colorado (USA)
Since late 1993, Metro Wastewater Reclamation District of Denver (Metro District, MWRD), a large wastewater treatment plant in Denver, Colorado, has applied Grade I, Class B biosolids to about 52,000 acres of nonirrigated farmland and rangeland near Deer Trail, Colorado, USA. In cooperation with the Metro District in 1993, the U.S. Geological Survey (USGS) began monitoring groundwater at part of t
Authors
J. G. Crock, D. B. Smith, T. J. B. Yager