Publications
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Stratigraphic occurrences of sub-polar planktic foraminifera in pleistocene sediments on the Lomonosov Ridge, Arctic Ocean 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...
Authors
Matt O’Regan, Helen Coxall, Thomas Cronin, Richard Gyllencreutz, Martin Jakobsson, Stefanie Kaboth, Ludvig Lowemark, Steffen Wiers, Gabriel West
The Value of Data – The Qatar Geologic Mapping Project 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
Authors
Joseph Krupansky, Michael Knight, Randall Orndorff, Khaled Al-Akhras, Ara Mouradian, Ali Saleh
Environmental and geomorphological changes on the eastern North American Continental Shelf across the Paleocene-Eocene Boundary 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...
Authors
Marci Robinson, Whittney Spivey
Quaternary eolian sediments and Carolina Bays of the U.S. Atlantic Coastal Plain province 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...
Authors
Christopher Swezey
Geology of the Mineral and Lake Anna West Quadrangles, Virginia 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...
Authors
Mark Carter, William Burton, Ryan McAleer, Mary DiGiacomo-Cohen, R. Sauer
Syn-collisional exhumation of hot middle crust in the Adirondack Mountains (New York, USA): Implications for extensional orogenesis in the southern Grenville province 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...
Authors
Sean Regan, Gregory Walsh, Michael Williams, Jeffrey Chiarenzelli, Megan Toft, Ryan McAleer
Geology and biostratigraphy of the Upper Floridan aquifer in the greater Savannah region, Georgia and South Carolina 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...
Authors
Jean Self-Trail, Mercer Parker, John Haynes, Arthur P. Schultz, Paul. Huddleston
Mid-latitude net precipitation decreased with Arctic warming during the Holocene 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...
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 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...
Authors
Rocio Caballero-Gill, Timothy Herbert, Harry Dowsett
North American Commission on Stratigraphic Nomenclature Note 69 – Application for addition of subseries/subepoch to the North American Stratigraphic Code North American Commission on Stratigraphic Nomenclature Note 69 – Application for addition of subseries/subepoch to the North American Stratigraphic Code
Consistency in stratigraphic nomenclature enables communication among scientists both regionally and globally, thus requiring the North American Stratigraphic Code, as presented by the North American Commission on Stratigraphic Nomenclature, to follow international convention. The ratification of three subseries of the Holocene by the InternationalUnion of Geological Sciences (IUGS) in...
Authors
Marie-Pierre Aubry, Richard Fluegeman, Lucy Edwards, Brian Pratt, Carlton Brett
Widespread global peatland establishment and persistence over the last 130,000 y Widespread global peatland establishment and persistence over the last 130,000 y
Glacial−interglacial variations in CO2 and methane in polar ice cores have been attributed, in part, to changes in global wetland extent, but the wetland distribution before the Last Glacial Maximum (LGM, 21 ka to 18 ka) remains virtually unknown. We present a study of global peatland extent and carbon (C) stocks through the last glacial cycle (130 ka to present) using a newly compiled...
Authors
Claire Treat, Thomas Kleinen, Nils Broothaerts, April Dalton, Rene Dommain, Thomas Douglas, Judith Drexler, Sarah A Finkelstein, Guido Grosse, Geoffrey Hope, Jack Hutchings, Miriam Jones, Peter Kuhry, Terri Lacourse, Outi Lahteenoja, Julie Loisel, Bastiaan Notebaert, Richard Payne, Dorothy Peteet, A. Sannel, Jonathan Stelling, Jens Strauss, Graeme Swindles, Julie Talbot, Charles Tarnocai, Gert Verstraeten, Christopher J. Williams, Zhengyu Xia, Zicheng Yu, Minna Valiranta, Martina Hattestrand, Helena Alexanderson, Victor Brovkin
An assessment of plant species differences on cellulose oxygen isotopes from two Kenai Peninsula, Alaska peatlands: Implications for hydroclimatic reconstructions An assessment of plant species differences on cellulose oxygen isotopes from two Kenai Peninsula, Alaska peatlands: Implications for hydroclimatic reconstructions
Peat cores are valuable archives of past environmental change because they accumulate plant organic matter over millennia. While studies have primarily focused on physical, ecological, and some biogeochemical proxies, cores from peatlands have increasingly been used to interpret hydroclimatic change using stable isotope analyses of cellulose preserved in plant remains. Previous studies...
Authors
Miriam Jones, Lesleigh Anderson, Katherine Keller, Bailey Nash, Virginia Littell, Matthew Wooller, Chelsea Jolley