Florence Bascom Geoscience Center

Publications

Filter Total Items: 348
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Year Published: 2008

Hydrologic connections and dynamics of water movement in the classical Karst (Kras) Aquifer: evidence from frequent chemical and stable isotope sampling

A review of past research on the hydrogeology of the Classical Karst (Kras) region and new information obtained from a two- year study using environmental tracers are presented in this paper. The main problems addressed are 1) the sources of water to the Kras aquifer resurgence zone-including the famous Timavo springs-under changing flow regimes;...

Doctor, Daniel H.
Hydrologic connections and dynamics of water movement in the classical Karst (Kras) Aquifer: evidence from frequent chemical and stable isotope sampling; 2008; Article; Journal; Acta Carsologica; Doctor, Daniel H.

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Year Published: 2008

Anatomy of a shoreface sand ridge revisted using foraminifera: False Cape Shoals, Virginia/North Carolina inner shelf

Certain details regarding the origin and evolution of shelf sand ridges remain elusive. Knowledge of their internal stratigraphy and microfossil distribution is necessary to define the origin and to determine the processes that modify sand ridges. Fourteen vibracores from False Cape Shoal A, a well-developed shoreface-attached sand ridge on the...

Robinson, Marci M.; McBride, Randolph A.
Anatomy of a shoreface sand ridge revisted using foraminifera: False Cape Shoals, Virginia/North Carolina inner shelf; 2008; Article; Journal; Continental Shelf Research; Robinson, Marci M.; McBride, Randolph A.

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Year Published: 2008

A 26 million year gap in the central Arctic record at the greenhouse-icehouse transition: Looking for clues

The Cenozoic record of the Lomonosov Ridge (central Arctic Ocean) recovered during Integrated Ocean Drilling Program (IODP) Expedition 302 revealed an unexpected 26 Ma hiatus, separating middle Eocene (∼44.4 Ma) from lower Miocene sediments (∼18.2 Ma). To elucidate the nature of this unconformity, we performed a multiproxy palynological (...

Sangiorgi, Francesca; Brumsack, Hans-Juergen; Willard, Debra A.; Schouten, Stefan; Stickley, Catherine E.; O'Regan, Matthew; Reichart, Gert-Jan; Damste, Jaap S. Sinninghe; Brinkhuis, Henk

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Year Published: 2008

Mid-Cenozoic tectonic and paleoenvironmental setting of the central Arctic Ocean

Drilling results from the Integrated Ocean Drilling Program's Arctic Coring Expedition (ACEX) to the Lomonosov Ridge (LR) document a 26 million year hiatus that separates freshwater-influenced biosilica-rich deposits of the middle Eocene from fossil-poor glaciomarine silty clays of the early Miocene. Detailed micropaleontological and...

O'Regan, M.; Moran, K.; Backman, J.; Jakobsson, M.; Sangiorgi, F.; Brinkhuis, Henk; Pockalny, Rob; Skelton, Alasdair; Stickley, Catherine E.; Koc, N.; Brumsack, Hans-Juergen; Willard, Debra A.
O'Regan, M., Moran, K., Jakobsson, M., Sangiorgi, F., Brinkhuis, H., Pockalny, R., Skelton, A., Stickley, C., Koc, N., Brumsack, H.-J., Willard, D., 2008, Mid-Cenozoic tectonic and paleoenvironmental setting of the central Arctic Ocean: Paleoceanography, v. 23, PA1S20, doi:10.1029/2007PA001559.

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Year Published: 2007

Hydrogeology and Simulated Ground-Water Flow in the Salt Pond Region of Southern Rhode Island

The Salt Pond region of southern Rhode Island extends from Westerly to Narragansett Bay and forms the natural boundary between the Atlantic Ocean and the shallow, highly permeable freshwater aquifer of the South Coastal Basin. Large inputs of fresh ground water coupled with the low flushing rates to the open ocean make the salt ponds particularly...

Masterson, John P.; Sorenson, Jason R.; Stone, Janet Radway; Moran, S. Bradley; Hougham, Andrea
Hydrogeology and Simulated Ground-Water Flow in the Salt Pond Region of Southern Rhode Island; 2007; SIR; 2006-5271; Masterson, John P.; Sorenson, Jason R.; Stone, Janet R.; Moran, S. Bradley; Hougham, Andrea

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Year Published: 2007

Integrated multi‐scale characterization of ground‐water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire

This chapter contains sections titled:IntroductionMirror Lake SiteFractures and Geologic MappingHydraulic Properties of Fractured Rock From Meters to KilometersChemical Migration in Fractured RockFracture Controls on Ground‐Water Flow and Chemical Transport at the Mirror Lake SiteSummary

Hyndman, David W.; Day-Lewis, Frederick D.; Singha, Kamini; Shapiro, Allen M.; Hsieh, Paul A.; Burton, William C.; Walsh, Gregory J.
Shapiro, A.M., Hsieh, P.A., Burton, W.C., and Walsh, G.J., 2007, Integrated multi-scale characterization of ground-water flow and chemical transport in fractured crystalline rock at the Mirror Lake Site, New Hampshire, in Hyndman, D.W., Day-Lewis, F.D., and Singha, K., eds., Subsurface Hydrology--Data Integration for Properties and Processes: Washington, D.C., American Geophysical Union, Geophysical Monograph Series, p. 201-225, ISBN:978-0-87590-437-5.

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Year Published: 2007

Cytherellid species (Ostracoda) and their significance to the Late Quaternary events in the Santos Basin, Brazil

Four autochthonous cytherellid species (Cytherella serratula (BRADY, 1880), C. hermargentina WHATLEY et al. 1998, C. pleistocenica sp. nov. and C. santosensis sp. nov.) have been identified from two offshore cores (44 samples) within the Santos Basin. The distribution of these ostracodes is controlled by local hydrological conditions such as the...

Bergue, C.T.; Coimbra, J.C.; Cronin, T. M.
Cytherellid species (Ostracoda) and their significance to the Late Quaternary events in the Santos Basin, Brazil; 2007; Article; Journal; Senckenbergiana Maritima; Bergue, C. T.; Coimbra, J. C.; Cronin, T. M.

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Year Published: 2005

Geologic map of the Stafford Quadrangle, Stafford County, Virginia

Introduction The Stafford 7.5-minute quadrangle, comprising approximately 55 square miles (142.5 square kilometers) of northeastern Virginia, is about 40 miles (mi) south of Washington, D.C. The region's main north-south transportation corridor, which connects Washington, D.C., and Richmond, Va., consists of Interstate 95, U.S. Highway 1, and...

Mixon, Robert B.; Pavlides, Louis; Horton, J. Wright; Powars, David S.; Schindler, J. Stephen
Geologic Map of the Stafford Quadrangle, Stafford County, Virginia; 2005; SIM; 2841; Mixon, Robert B.; Pavlides, Louis; Horton, J. Wright, Jr.; Powars, David S.; Schindler, J. Stephen

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Year Published: 2000

Constraints on timing and rates of late Cenozoic incision by the Colorado River in Glenwood Canyon, Colorado: A preliminary synopsis

No abstract available.

Kirkham, Robert M.; Kunk, Michael J.; Bryant, Bruce; Streufert, Randall K.

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Year Published: 2000

Climatic variability in the eastern United States over the past millennium from Chesapeake Bay sediments

Salinity oscillations caused by multidecadal climatic variability had major impacts on the Chesapeake Bay estuarine ecosystem during the past 1000 yr. Microfossils from sediments dated by radiometry (14C, 137Cs, 210Pb) and pollen stratigraphy indicate that salinity in mesohaline regions oscillated 10-15 ppt during periods of extreme drought (low...

Cronin, Thomas M.; Willard, Debra A.; Karlsen, A.; Ishman, S.; Verardo, S.; McGeehin, John; Kerhin, R.; Holmes, C.; Colman, S.; Zimmerman, A.

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Year Published: 2000

Isotopic ages from intrusive rocks near the Stuyahok gold placer deposits, south-central Holy Cross quadrangle, Alaska: A section in Geologic studies in Alaska by the U.S. Geological Survey, 1998

In the Stuyahok area of the south-central Holy Cross quadrangle, Alaska, felsic to intermediate dikes and sills intrude Lower Cretaceous volcanic and volcaniclastic rocks of the Koyukuk terrane. These previously undated intrusions are the probable source of at least 933 kg (30,000 oz) of past placer gold production. Additional placer, and perhaps...

Miller, Marti L.; Tucker, Robert D.; Layer, Paul W.; Bundtzen, Thomas K.

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Year Published: 1999

Application of aerial gamma-ray spectrometric and magnetic surveys in geologic mapping: a case study in southern Virginia and northern North Carolina

Aerial gamma-ray spectrometric and magnetic survey maps are valuable aids for geologic mapping where rocks are poorly exposed in south-central Virginia and northernmost North Carolina. Broad low areas on the potassium and thorium gamma-ray survey maps distinguish the Carolina, Spring Hope, and Roanoke Rapids terranes from more highly radiogenic...

Horton, J. Wright; Daniels, David L.
Application of aerial gamma-ray spectrometric and magnetic surveys in geologic mapping: a case study in southern Virginia and northern North Carolina; 1999; Book chapter; Book; Geology of the Fall Zone Region along to North Carolina-Virginia State Line: guidebook for the 1999 meeting of the Carolina Geological Society; Horton, J. Wright, Jr.; Daniels, David L.