Florence Bascom Geoscience Center

Publications

Filter Total Items: 519
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Year Published: 2017

Geology along the Blue Ridge Parkway in Virginia

Detailed geologic mapping and new SHRIMP (sensitive high-resolution ion microprobe) U-Pb zircon, Ar/Ar, Lu-Hf, 14C, luminescence (optically stimulated), thermochronology (fission-track), and palynology reveal the complex Mesoproterozoic to Quaternary geology along the ~350 km length of the Blue Ridge Parkway in Virginia. Traversing the...

Carter, Mark W.; Southworth, C. Scott; Tollo, Richard P.; Merschat, Arthur J.; Wagner, Sara; Lazor, Ava; Aleinikoff, John N.
Carter, M.W., Southworth, S., Tollo, R.P., Merschat, A.J., Wagner, S., Lazor, A., and Aleinikoff, J.N., 2017, Geology along the Blue Ridge Parkway in Virginia, in Bailey, C.M., and Jaye, S., eds., From the Blue Ridge to the Beach: Geological Field Excursions across Virginia: Geological Society of America Field Guide 47, p. 1–58, doi:10.1130/2017.0047(01).

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Year Published: 2017

Geology and biostratigraphy of the Potomac River cliffs at Stratford Hall, Westmoreland County, Virginia

The cliffs along the Potomac River at Stratford Hall display extensive exposures of Miocene marine strata that belong successively to the Calvert, Choptank, St. Marys, and Eastover Formations. Within the lower part of this sequence, in the Calvert and Choptank Formations, there is well-developed cyclic stratigraphy. Above the Miocene units lies...

Weems, Robert E.; Edwards, Lucy E.; Landacre, Bryan D.
Robert E. Weems, Lucy E. Edwards and Bryan Landacre Geology and biostratigraphy of the Potomac River cliffs at Stratford Hall, Westmoreland County, Virginia GSA Field Guides 2017, v. 47, p. 125-152

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Year Published: 2017

Geology of the Petersburg batholith, eastern Piedmont, Virginia

The 295-300 Ma Petersburg batholith in east-central Virginia forms one of the largest and northernmost of the Alleghanian plutonic complexes in the southern Appalachian Piedmont. The batholith is primarily composed of granite including massive and foliated (both magmatic and solid-state fabrics) varieties. The plutonic complex intruded medium-...

Owens, Brent E.; Carter, Mark W.; Bailey, Christopher M.
Owens, B.E., Carter, M., and Bailey, C.M., 2017, Geology of the Petersburg batholith, eastern Piedmont, Virginia, in Bailey, C.M., and Jaye, S., eds., From the Blue Ridge to the Beach: Geological Field Excursions across Virginia: Geological Society of America Field Guide 47, p. 153–162

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Year Published: 2017

Post-rift magmatic evolution of the eastern North American “passive-aggressive” margin

Understanding the evolution of passive margins requires knowledge of temporal and chemical constraints on magmatism following the transition from supercontinent to rifting, to post-rifting evolution. The Eastern North American Margin (ENAM) is an ideal study location as several magmatic pulses occurred in the 200 My following rifting. In...

Mazza, Sarah E.; Gazel, Esteban; Johnson, Elizabeth A.; Bizmis, Michael; McAleer, Ryan J.; Biryol, C. Berk
Mazza, S. E., E. Gazel, E. A. Johnson, M. Bizimis, R. McAleer, and C. B. Biryol (2017), Post-rift magmatic evolution of the eastern North American “passive-aggressive” margin, Geochem. Geophys. Geosyst., 18, 3–22

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Year Published: 2017

Biological response to climate change in the Arctic Ocean: The view from the past

The Arctic Ocean is undergoing rapid climatic changes including higher ocean temperatures, reduced sea ice, glacier and Greenland Ice Sheet melting, greater marine productivity, and altered carbon cycling. Until recently, the relationship between climate and Arctic biological systems was poorly known, but this has changed substantially as advances...

Cronin, Thomas M.; Cronin, Matthew A.

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Year Published: 2016

Glacial Lake Hitchcock and the sea: Fieldtrip Guidebook for the 78th Annual Reunion of the Northeast Friends of the Pleistocene

The fieldtrip will demonstrate the evidence for a close connection of Lake Hitchcock levels with lake levels and the position of sea level in Long Island Sound via a channel cut into glacial lake deposits in the lower Connecticut River valley, which issuperposed on a bedrock ridge at the mouth of the Connecticut River. On the trip we will explain...

Thomas, Margaret A.; Stone, Janet Radway; Ridge, J.C.; Lewis, Ralph S.; DiGiacomo-Cohen, Mary L.
Stone, J.R., Ridge, J.C., Lewis, R.S., and DiGiacomo-Cohen, M.L., 2015, Glacial Lake Hitchcock and the Sea, in Thomas, M.A., ed, Fieldtrip Guidebook for the 78th Annual Reunion of the Northeast Friends of the Pleistocene: State Geological and Natural History Survey of Connecticut Guidebook No. 10

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Year Published: 2016

Paleogeographic implications of Late Miocene lacustrine and nonmarine evaporite deposits in the Lake Mead region: Immediate precursors to the Colorado River

Thick late Miocene nonmarine evaporite (mainly halite and gypsum) and related lacustrine limestone deposits compose the upper basin fill in half grabens within the Lake Mead region of the Basin and Range Province directly west of the Colorado Plateau in southern Nevada and northwestern Arizona. Regional relations and geochronologic data indicate...

Faulds, James E.; Schreiber, Charlotte; Langenheim, Victoria; Hinz, Nicholas H.; Shaw, Tom; Heizler, Matthew T.; Perkins, Michael E; El Tabakh, Mohammed; Kunk, Michael J.

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Year Published: 2016

Reply [to] Zalasiewicz et al. comment

No abstract available.

Finney, Stanley C.; Edwards, E.
Finney, Stanley C., and Edwards, Lucy E., GSA Today, v. 27, no. 2, p. e38

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Year Published: 2016

A simple rubric for Stratigraphic Fidelity (β) of paleoenvironmental time series

The Pliocene, specifically the late Pliocene, has been a focus of paleoclimate research formore than 25 years. Synoptic regional and global reconstructions along with high-resolution time-series have produced nuanced conceptual models of paleoenvironmental conditions and enhanced our understanding of climate variability and climate sensitivity...

Dowsett, Harry J.; Robinson, Marci M.; Foley, Kevin M.
Dowsett, H., Robinson, M., Foley, K., 2017. A simple rubric for Stratigraphic Fidelity (β) of paleoenvironmental time series. Stratigraphy 13, 303-305.

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Year Published: 2016

Linking the Central and Southern Appalachian Blue Ridge: What We Know and Don’t Know about Stratigraphy, Structure, Tectonism, and Regional Correlation in the Eastern Blue Ridge of Virginia

The transition from Neoproterozoic Lynchburg Group rocks on the eastern limb of the para-autochthonous Blue Ridge anticlinorium in central Virginia to the fault-bounded Ashe Formation and Alligator Back Formation in southern Virginia has been a source of intense debate and speculation for decades. There are fundamental differences in the...

Carter, Mark W.; Merschat, Arthur J.
Carter, M.W. and Merschat, A.J., 2016, Linking the Central and Southern Appalachian Blue Ridge: What We Know and Don’t Know about Stratigraphy, Structure, Tectonism, and Regional Correlation in the Eastern Blue Ridge of Virginia, in Merschat A.J., ed., Geology of the Mount Rogers area, revisted, Blue Ridge, VA-NC-TN: Field Guide for the Carolina Geological Society Annual Field Trip, October 29-30, 2016, p. 43-58.

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Year Published: 2016

The Carolina Sandhills: Quaternary eolian sand sheets and dunes along the updip margin of the Atlantic Coastal Plain province, southeastern United States

The Carolina Sandhills is a physiographic region of the Atlantic Coastal Plain province in the southeastern United States. In Chesterfield County (South Carolina), the surficial sand of this region is the Pinehurst Formation, which is interpreted as eolian sand derived from the underlying Cretaceous Middendorf Formation. This sand has yielded...

Swezey, Christopher S.; Fitzwater, Bradley A.; Whittecar, G. Richard; Mahan, Shannon A.; Garrity, Christopher P.; Aleman Gonzalez, Wilma B.; Dobbs, Kerby M.
Swezey, C.S., Fitzwater, B.A., Whittecar, G.R., Mahan, S.A., Garrity, C.P., Alemán González, W., and Dobbs, K.M., 2016, The Carolina Sandhills: Quaternary eolian sand sheets and dunes along the updip margin of the Atlantic Coastal Plain Province, southeastern United States: Quaternary Research, v. 86, p. 271-286.

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Year Published: 2016

Geology of the eastern Piedmont in Virginia

No abstract available.

Bailey, Christopher M.; Sherwood, W. Cullen; Eaton, L. Scott; Powars, David S.; Horton, J. Wright; Owens, Brent E.; Hackley, Paul C.; Burton, William C.; Sacks, Paul E.; Hibbard, James P.
Horton, J.W., Jr., Owens, B.E., Hackley, P.C., Burton, W.C., Sacks, P.E., and Hibbard, J.P., 2016, Geology of the Eastern Piedmont in Virginia, in Bailey, C.M., Sherwood, W.C., Eaton, L.S., and Powars, D.S., eds., The Geology of Virginia: Martinsville, Virginia Museum of Natural History, Special Publication 18, p. 125-158, ISBN: 1-884549-40-3.