Florence Bascom Geoscience Center

Publications

Filter Total Items: 567
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Year Published: 2021

Borehole sampling of surficial sediments in Northern Virginia and Southern Maryland

From 2014 to 2017, the U.S. Geological Survey’s Florence Bascom Geoscience Center (FBGC) entered into an inter-agency agreement with the Federal Highway Administration’s Turner-Fairbank Highway Research Center (TFHRC) to assist in field site selection and auger drilling fieldwork. The TFHRC was developing a device to measure the erosional...

Chirico, Peter G.; DeWitt, Jessica D.; Bergstresser, Sarah E.
Chirico, P.G., DeWitt, J.D., and Bergstresser, S.E., 2021, Borehole sampling of surficial sediments in Northern Virginia and Southern Maryland: U.S. Geological Survey Open-File Report 2021–1038, 27 p., https://doi.org/10.3133/ofr20211038.

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Year Published: 2021

Estimating Piacenzian sea surface temperature using an alkenone-calibrated transfer function

Stationarity of environmental preferences is a primary assumption required for any paleoenvironmental reconstruction using fossil materials based upon calibration to modern organisms. Confidence in this assumption decreases the further back in time one goes, and the validity of the assumption that species temperature tolerances have not changed...

Dowsett, Harry J.; Robinson, Marci M.; Foley, Kevin M.
Dowsett, H.J., Robinson, M.M., and Foley, K.M., 2021, Estimating Piacenzian sea surface temperature using an alkenone-calibrated transfer function: U.S. Geological Survey Scientific Investigations Report 2021–5051, 17 p., https://doi.org/10.3133/sir20215051.

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Year Published: 2021

Biogeography and ecology of Ostracoda in the U.S. northern Bering, Chukchi, and Beaufort Seas

Ostracoda (bivalved Crustacea) comprise a significant part of the benthic meiofauna in the Pacific-Arctic region, including more than 50 species, many with identifiable ecological tolerances. These species hold potential as useful indicators of past and future ecosystem changes. In this study, we examined benthic ostracodes from nearly 300 surface...

Gemery, Laura; Cronin, Thomas M.; Cooper, Lee W.; Dowsett, Harry J.; Grebmeier, Jacqueline M.

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Year Published: 2021

A review of spatially resolved techniques and applications of organic petrography in shale petroleum systems

This review examines new techniques and applications of organic petrography in source-rock reservoir petroleum systems that have occurred along with development of the global ‘shale revolution’ in energy resources. The review is limited to techniques and instrumentation that provide spatially resolved information, typically at...

Hackley, Paul C.; Jubb, Aaron M.; McAleer, Ryan J.; Valentine, Brett J.; Birdwell, Justin E.

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Year Published: 2021

Stable oxygen isotopes in shallow marine ostracodes from the northern Bering and Chukchi Seas

Stable oxygen isotope measurements on calcitic valves of benthic ostracodes (δ18Oost) from the northern Bering and Chukchi Seas were used to examine ecological and hydrographic processes governing ostracode and associated seawater δ18O values. Five cryophilic taxa were analyzed for δ18Oost values: Sarsicytheridea bradii; Paracyprideis...

Gemery, Laura; Cooper, L.W.; Magen, C; Cronin, T. M.; Grebmeier, J.M.

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Year Published: 2021

Synthesis of geochronologic research on Late Pliocene to Holocene emergent shorelines in the lower Savannah River area of southeastern Georgia, USA

Emergent late Pliocene and Pleistocene shoreline deposits, morphologically identifiable Pleistocene shoreline units, and seaward-facing scarps characterize the easternmost Atlantic Coastal Plain (ACP) of the United States of America. In some areas of the ACP, these deposits, units, and scarps have been studied in detail. Within these areas,...

Markewich, Helaine W.; Pavich, Milan J.; Mahan, Shannon A.; Bierman, Paul R.; Alemán‑González, Wilma B.; Schultz, Arthur P.
Markewich, H.W., Pavich, M.J., Mahan, S.A., Bierman, P.R., Alemán‑González, W.B., and Schultz, A.P., 2021, Synthesis of geochronologic research on Late Pliocene to Holocene emergent shorelines in the lower Savannah River area of southeastern Georgia, USA: U.S. Geological Survey Open-File Report 2021–1015, 48 p., https://doi.org/10.3133/ofr20211015.

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Year Published: 2021

Foreward: The paleoclimatic and paleobiogeographic significance of the Tjörnes Basin, Northern Iceland

Since the mid-19th century, geologists and paleontologists have recognized the scientific importance and unique nature of the richly fossiliferous sediments exposed along the Tjörnes Peninsula in Northern Iceland. In the following century and a half, Tjörnes has attracted the attention of an international “who’s who” in Cenozoic paleontology, as...

Cronin, Thomas M.

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Year Published: 2021

Spatiotemporal patterns of northern lake formation since the last glacial maximum

The northern mid- to high-latitudes have the highest total number and area of lakes on Earth. Lake origins in these regions are diverse, but to a large extent coupled to glacial, permafrost, and peatland histories. The synthesis of 1207 northern lake initiation records presented here provides an analog for rapid landscape-level change in response...

Brosius, L. S.; Walter Anthony, K. M.; Treat, C. C.; Lenz, J.; Jones, Miriam C.; Bret-Harte, M. Syndonia; Grosse, G.

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Year Published: 2021

River terrace evidence of tectonic processes in the eastern North American plate interior, South Anna River, Virginia

We show that long-recognized seismicity in the central Virginia seismic zone (CVSZ) of the eastern North American (ENAM) intraplate setting arises primarily from tectonic processes predicted by new, fully coupled plate tectonic geodynamic models. The study leverages much new geophysical and geologic data following the 2011 Mineral, VA earthquake...

Pazzaglia, Frank J.; Malenda, Helen F.; McGavick, Matthew L.; Raup, Cody; Carter, Mark W.; Berti, Claudio; Mahan, Shannon A.; Nelson, Michelle S.; Rittenour, Tammy M.; Counts, Ron; Willenbring, Jane K; Germanoski, Dru; Peters, Stephen C.; Holt, William D.

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Year Published: 2021

Expert assessment of future vulnerability of the global peatland carbon sink

The carbon balance of peatlands is predicted to shift from a sink to a source this century. However, peatland ecosystems are still omitted from the main Earth system models that are used for future climate change projections, and they are not considered in integrated assessment models that are used in impact and mitigation studies. By using...

Loisel, Julie; Gallego-Sala, A.V.; Amesbury, M.J.; Magnan, G.; Anshari, G.; Beilman, D. W.; Blewett, J.; Benevides, J. C.; Camill, P.; Charman, D. J.; Chawchai, S.; Hedgpeth, A.; Kleinen, T.; Korhola, A.; Large, D.; Müller, J.; Mansilla, C. A.; van Bellen, S.; West, J. B.; Yu, Z.; Bubier, J. L.; Garneau, M.; Moore, T.; Sannel, A. B. K.; Väliranta, M.; Page, S.; Bechtold, M.; Brovkin, V.; Cole, L. E. S.; Chanton, J. P.; Christensen, T. R.; Davies, M. A.; De Vleeschouwer, F.; Finkelstein, S.A.; Frolking, S.; Galka, M.; Gandois, L.; Girkin, N.; Harris, .L.I.; Heinemeyer, A.; Hoyt, A.M.; Jones, Miriam C.; Joos, F.; Juutinen, S.; Kaiser, K.; Lamentowicz, M.; Larmola, T.; Leifeld, M.; Lohila, A.; Milner, A.M.; Minkkinen, Kari; Moss, P.; Naafs, B.D.A.; Nichols, J.; O'Donnell, J.; Payne, R.; Philben, M.; Pilo, S.; Quillet, A.; Ratnayake, A.S.; Roland, T.P.; Sjogersten, S.; Sonnentag, O.; Swindles, G.T.; Swinnen, W.; Talbott, J.; Treat, C. C.; Valach, A.C.; Wu, J.

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Year Published: 2021

Karst geology of the Upper Midwest, USA

Karst in the Upper Midwest occurs within a thick sequence of mixed carbonate and siliciclastic Cambrian through Pennsylvanian sedimentary rocks, with a minor occurrence of karst in Proterozoic sandstone. Deposition of the sediments occurred on a marine epeiric ramp that spanned much of the North American continent through most of the...

Doctor, Daniel H.; Alexander, E. Calvin

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Year Published: 2021

Dendritic reidite from the Chesapeake Bay impact horizon, Ocean Drilling Program Site 1073 (offshore northeastern USA): A fingerprint of distal ejecta?

High-pressure minerals provide records of processes not normally preserved in Earth’s crust. Reidite, a quenchable polymorph of zircon, forms at pressures >20 GPa during shock compression. However, there is no broad consensus among empirical, experimental, and theoretical studies on the nature of the polymorphic transformation. Here we decipher...

Cavosie, Aaron J.; Biren, Marc C; Hodges, Kip V.; Wartho, Jo-Anne; Horton, J. Wright; Koeberl, Christian