Publications
Filter Total Items: 830
Geology of the Cornwall Quadrangle, Virginia
No abstract available.
Authors
Matthew J. Heller, Mark W. Carter, G.P. Wilkes, R.L. Coiner
Permafrost collapse is accelerating carbon release
This much is clear: the Arctic is warming fast, and frozen soils are starting to thaw, often for the first time in thousands of years. But how this happens is as murky as the mud that oozes from permafrost when ice melts.As the temperature of the ground rises above freezing, microorganisms break down organic matter in the soil. Greenhouse gases — including carbon dioxide, methane and nitrous oxide
Authors
Merritt R. Turetsky, Benjamin W. Abbott, Miriam Jones, Katey Walter Anthony, David Olefeldt, Edward A. Schuur, Charles Koven, A.D. McGuire, Guido Grosse, Peter Kuhry, Gustaf Hugelius, David M. Lawrence, Carolyn Gibson, A. B. K. Sannel
The Appalachian Geo-STEM Camp: Learning about geology through experiential adventure recreation
The inaugural Appalachian Geo-STEM Camp (AGC) was a partnership between West Virginia University (WVU), the U.S. Geological Survey (USGS) and the West Virginia Geological and Economic Survey (WVGES). Designed to engage high school students in geoscience-oriented Science, Technology, Engineering and Mathematics (STEM) activities through adventure-based outdoor recreation, the inaugural AGC took pl
Authors
Robert Burns, Mark W. Carter, John Brock, Jonas Leveque, Emily Bunse, Monica Palaseanu-Lovejoy, Gerald F. Guala, Nathan Harlan, Mitchel Blake, Jasmine Moreira, Jim Britton, Kenny Ashton, Barnes Nugent, Michael Marketti
Stratigraphic occurrences of sub-polar planktic foraminifera in pleistocene sediments on the Lomonosov Ridge, Arctic Ocean
Turborotalita quinqueloba is a species of planktic foraminifera commonly found in the sub-polar North Atlantic along the pathway of Atlantic waters in the Nordic seas and sometimes even in the Arctic Ocean, although its occurrence there remains poorly understood. Existing data show that T. quinqueloba is scarce in Holocene sediments from the central Arctic but abundance levels increase in sediment
Authors
Matt O'Regan, Helen Coxall, Thomas M. Cronin, Richard Gyllencreutz, Martin Jakobsson, Stefanie Kaboth, Ludvig Löwemark, Steffen Wiers, Gabriel West
The Value of Data – The Qatar Geologic Mapping Project
The State of Qatar is in a period of rapid development, modernization, and population growth. One of the most important factors influencing the long-term success and sustainability of future development is a comprehensive understanding of the region’s geologic regime, geotechnical conditions, natural resources, and environmental constraints. To obtain this understanding, the Ministry of Municipal
Authors
Joseph T. Krupansky, Michael A. Knight, Randall Orndorff, Khaled M. Al-Akhras, Ara G. Mouradian, Ali F. Saleh
Environmental and geomorphological changes on the eastern North American Continental Shelf across the Paleocene-Eocene Boundary
Foraminiferal evidence from two sites in southern Maryland, eastern United States, reveals a series of rapid ecological changes on the continental shelf during the onset of the Paleocene-Eocene Thermal Maximum (PETM). Benthic and planktic foraminifer assemblages from the South Dover Bridge (SDB) and Mattawoman Creek-Billingsley Road (MCBR) cores in the central Salisbury Embayment record changing l
Authors
Marci M. Robinson, Whittney Spivey
Quaternary eolian sediments and Carolina Bays of the U.S. Atlantic Coastal Plain province
Under modern conditions, the Atlantic Coastal Plain province of the eastern United States is not very conducive to widespread eolian sediment mobilization because of a humid and mesothermal climate, relatively low mean surface wind velocities (~1–3 m/sec), and relatively dense vegetation. LiDAR data, however, have revealed the presence of widespread eolian dunes and sand sheets (now covered by ve
Authors
Christopher S. Swezey
Geology of the Mineral and Lake Anna West Quadrangles, Virginia
This map product is a cooperator series publication and, as such, does not have a specific abstract.
Geologic mapping for this map product was completed between 2014 and 2017, with most of the field work occurring between January 2016 and May 2017. Numerous foot traverses were completed along creeks and roads throughout the field area; the shore of Lake Anna was accessed by kayak to provide addit
Authors
Mark W. Carter, William C. Burton, Ryan J. McAleer, Mary DiGiacomo-Cohen, R. Tyler Sauer
Syn-collisional exhumation of hot middle crust in the Adirondack Mountains (New York, USA): Implications for extensional orogenesis in the southern Grenville province
Extensional deformation in the lower to middle continental crust is increasingly
recognized and shown to have significant impact on crustal architecture, magma
emplacement, fluid flow, and ore deposits. Application of the concept of extensional
strain to ancient orogenic systems, like the Grenville province of eastern North
America, has helped decipher the structural evolution of these regions. Th
Authors
Sean Regan, Gregory J. Walsh, Michael L. Williams, Jeffrey R. Chiarenzelli, Megan E. Toft, Ryan J. McAleer
Geology and biostratigraphy of the Upper Floridan aquifer in the greater Savannah region, Georgia and South Carolina
The Upper Floridan aquifer (UFA) of South Carolina, Georgia, Alabama, Mississippi, and Florida has been considered a regionally continuous stratigraphic sequence of Eocene to Miocene carbonate strata, with documented unconformities based on lithology and biostratigraphy. As part of an investigation of the regional subsurface geologic framework in the Atlantic Coastal Plain Province, three deep co
Authors
Jean Self-Trail, Mercer Parker, John T. Haynes, Arthur P. Schultz, Paul. F. Huddleston
Mid-latitude net precipitation decreased with Arctic warming during the Holocene
The latitudinal temperature gradient between the Equator and the poles influences atmospheric stability, the strength of the jet stream and extratropical cyclones. Recent global warming is weakening the annual surface gradient in the Northern Hemisphere by preferentially warming the high latitudes; however, the implications of these changes for mid-latitude climate remain uncertain. Here we show t
Authors
Cody Routson, Nicholas McKay, Darrell Kaufman, Hugues Goosse, Bryan Shuman, Jessica Rodysill, Toby Ault
100-kyr paced climate change in the Pliocene warm period, Southwest Pacific
The mid to late Pliocene (~4.2-2.8 Ma.) represents an experiment in climate
sensitivity to orbital pacing in which nearly all continental ice was confined to the
Southern Hemisphere. Most studies have emphasized the dominant role of obliquity in
determining changes in ice volume and temperature at this time, although most records
come from the Northern Hemisphere, instead of the hemisphere where t
Authors
Rocio Caballero-Gill, Timothy D. Herbert, Harry Dowsett