Publications
Filter Total Items: 1459
Geophysical expression of elements of the Rio Grande rift in the northeast Tusas Mountains - Preliminary interpretations Geophysical expression of elements of the Rio Grande rift in the northeast Tusas Mountains - Preliminary interpretations
New interpretations of the nature of the Rio Grande rift and pre-existing rocks in the northeast Tusas Mountains region are derived from new and existing gravity and aeromagnetic data. 12-15 mGal amplitude gravity lows are interpreted to mainly reflect large thicknesses of the upper Oligocene to upper Miocene, syn-rift Los Pinos Formation and possibly significant amounts of the Eocene El...
Authors
Benjamin J. Drenth, Kenzie J. Turner, Ren A. Thompson, V. J. Grauch, Michael A. Cosca, John Lee
U.S. Geological Survey Karst Interest Group Proceedings, Fayetteville, Arkansas, April 26-29, 2011 U.S. Geological Survey Karst Interest Group Proceedings, Fayetteville, Arkansas, April 26-29, 2011
Karst aquifer systems are present throughout parts of the United States and some of its territories and are developed in carbonate rocks (primarily limestone and dolomite) that span the entire geologic time frame. The depositional environments, diagenetic processes, and post-depositional tectonic events that form carbonate rock aquifers are varied and complex, involving both biological...
A GIS application for assessing, mapping, and quantifying the social values of ecosystem services A GIS application for assessing, mapping, and quantifying the social values of ecosystem services
As human pressures on ecosystems continue to increase, research involving the effective incorporation of social values information into the context of comprehensive ecosystem services assessments is becoming more important. Including quantified, spatially explicit social value metrics in such assessments will improve the analysis of relative tradeoffs among ecosystem services. This paper...
Authors
Benson C. Sherrouse, Jessica M. Clement, Darius J. Semmens
Helicopter electromagnetic and magnetic geophysical survey data, Hunton anticline, south-central Oklahoma Helicopter electromagnetic and magnetic geophysical survey data, Hunton anticline, south-central Oklahoma
This report is a digital data release for multiple geophysical surveys conducted in the Hunton anticline area of south-central Oklahoma. The helicopter electromagnetic and magnetic surveys were flown on March 16–17, 2007, in four areas of the Hunton anticline in south-central Oklahoma. The objective of this project is to improve the understanding of the geohydrologic framework of the...
Authors
Bruce D. Smith, David V. Smith, Maryla Deszcz-Pan, Charles D. Blome, Patricia Hill
Cenozoic tectonic reorganizations of the Death Valley region, southeast California and southwest Nevada Cenozoic tectonic reorganizations of the Death Valley region, southeast California and southwest Nevada
The Death Valley region, of southeast California and southwest Nevada, is distinct relative to adjacent regions in its structural style and resulting topography, as well as in the timing of basin-range extension. Cenozoic basin-fill strata, ranging in age from greater than or equal to 40 to approximately 2 million years are common within mountain-range uplifts in this region. The...
Authors
Christopher J. Fridrich, Ren A. Thompson
Aeolian and fluvial processes in dryland regions: The need for integrated studies Aeolian and fluvial processes in dryland regions: The need for integrated studies
Aeolian and fluvial processes play a fundamental role in dryland regions of the world and have important environmental and ecological consequences from local to global scales. Although both processes operate over similar spatial and temporal scales and are likely strongly coupled in many dryland systems, aeolian and fluvial processes have traditionally been studied separately, making it...
Authors
Jayne Belnap, Seth M. Munson, Jason P. Field
Summary of the stratigraphy and structural elements related to plate convergence of the Quetta-Muslim Bagh-Sibi region, Balochistan, west-central Pakistan Summary of the stratigraphy and structural elements related to plate convergence of the Quetta-Muslim Bagh-Sibi region, Balochistan, west-central Pakistan
Obduction of an ophiolite complex onto the northwestern continental margin of the India plate occurred during the Late Cretaceous to early Paleocene, followed by collision of the ophiolitic complex of the India plate with the Eurasia plate in the Eocene. Lower Eocene marine strata overlie the ophiolitic complex suggesting that suturing was completed by early Eocene time. The Quetta...
Authors
Florian Maldonado, Jan M. Mengal, Shahid H. Khan, Peter D. Warwick
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative-2010 Annual Report U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative-2010 Annual Report
This is the third report produced by the U.S. Geological Survey (USGS) for the Wyoming Landscape Conservation Initiative (WLCI) to detail annual work activities. The first report described activities for 2007 and 2008, and the second report covered work activities for FY09. This third report covers work activities conducted in FY2010, and it continues the 2009 approach of reporting on...
Authors
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Laura Biewick, Steven W. Blecker, Gregory K. Boughton, R. Sky Bristol, Natasha B. Carr, Anna D. Chalfoun, Geneva W. Chong, Melanie L. Clark, Jay E. Diffendorfer, Bradley C. Fedy, Katharine Foster, Steven L. Garman, Steve Germaine, JoAnn Holloway, Collin G. Homer, Matthew J. Kauffman, Douglas Keinath, Natalie Latysh, Daniel J. Manier, Robert R. McDougal, Cynthia P. Melcher, Kirk A. Miller, Jessica Montag, Christopher J. Potter, Spencer Schell, Sarah L. Shafer, David B. Smith, Lisa L. Stillings, Michele L. Tuttle, Anna B. Wilson
Geospatial Multi-Agency Coordination (GeoMAC) wildland fire perimeters, 2008 Geospatial Multi-Agency Coordination (GeoMAC) wildland fire perimeters, 2008
The Geospatial Multi-Agency Coordination (GeoMAC) has been collecting and storing data on wildland fire perimeters since August 2000. The dataset presented via this U.S. Geological Survey Data Series product contains the GeoMAC wildland fire perimeter data for the calendar year 2008, which are based upon input from incident intelligence sources, Global Positioning System (GPS) data, and...
Authors
Sandra P. Walters, Norma J. Schneider, John D. Guthrie
Deglaciation and postglacial treeline fluctuation in the northern San Juan Mountains, Colorado Deglaciation and postglacial treeline fluctuation in the northern San Juan Mountains, Colorado
The San Juan Mountains of southwestern Colorado contain numerous lakes and bogs at and above treeline. In June 1978, Lake Emma, a tarn above present-day treeline, was suddenly drained by the collapse of underground mine workings. This study was initiated because the draining exposed a well-preserved archive of subfossil coniferous wood fragments that provided a unique opportunity to...
Authors
Paul E. Carrara
Identification of last interglacial deposits in eastern Beringia: a cautionary note from the Palisades, interior Alaska Identification of last interglacial deposits in eastern Beringia: a cautionary note from the Palisades, interior Alaska
Last interglacial sediments in unglaciated Alaska and Yukon (eastern Beringia) are commonly identified by palaeoecological indicators and stratigraphic position ~2-5m above the regionally prominent Old Crow tephra (124 + or - 10ka). We demonstrate that this approach can yield erroneous age assignments using data from a new exposure at the Palisades, a site in interior Alaska with...
Authors
Alberto V. Reyes, Grant D. Zazula, Svetlana Kuzmina, Thomas A. Ager, Duane G. Froese
Physical, chemical, and mineralogical data from surficial deposits, groundwater levels, and water composition in the area of Franklin Lake playa and Ash Meadows, California and Nevada Physical, chemical, and mineralogical data from surficial deposits, groundwater levels, and water composition in the area of Franklin Lake playa and Ash Meadows, California and Nevada
This report presents data and describes the methods used to determine the physical attributes, as well as the chemical and mineralogical composition of surficial deposits; groundwater levels; and water composition in the area of Franklin Lake playa and Ash Meadows, California and Nevada. The results support studies that examine (1) the interaction between groundwater and the ground...
Authors
Harland L. Goldstein, George N. Breit, James C. Yount, Richard L. Reynolds, Marith C. Reheis, Gary L. Skipp, Eric M. Fisher, Paul J. Lamothe