Florence Bascom Geoscience Center

Publications

Filter Total Items: 553
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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

Mapping the glacial geology of the Central Great Lakes region in three dimensions: A model for state-federal cooperation

Planners need to evaluate complex and competing public-policy options for managing water, land, and biological resources; they must ensure economic growth, meet the needs of an increasing population, assess hazards, and manage the environment in a sustainable manner. The State Geological Surveys of Illinois, Indiana, Michigan, and Ohio and the U.S...

Berg, Richard C.; Bleuer, Ned K.; Jones, Berwyn E.; Kincare, Kevin A.; Pavey, Richard R.; Stone, Byron D.
Mapping the glacial geology of the Central Great Lakes region in three dimensions; a model for state-federal cooperation; 1999; OFR; 99-349; Berg, R. C.; Bleuer, N. K.; Jones, B. E.; Kincare, K. A.; Pavey, R. R.; Stone, B. D.

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Year Published: 1999

Lithostratigraphy, geophysics, biostratigraphy, and strontium-isotope stratigraphy of the surficial aquifer system of eastern Collier County and northern Monroe County, Florida

In 1997, ten cores were drilled in eastern Collier County and northern Monroe County, within the limits of the Big Cypress National Preserve. These cores represent a continuation of the study of seven cores in western Collier County begun in 1996 and reported in Weedman and others (1997) and Edwards and others (1998). This joint U.S. Geological...

Weedman, S.D.; Paillet, Frederick L.; Edwards, Lucy E.; Simmons, K.R.; Scott, T.M.; Wardlaw, B.R.; Reese, R.S.; Blair, J.L.
Lithostratigraphy, geophysics, biostratigraphy, and strontium-isotope stratigraphy of the surficial aquifer system of eastern Collier County and northern Monroe County, Florida; 1999; OFR; 99-432; Weedman, S. D; Paillet, F. L.; Edwards, L. E.; Simmons, K. R.; Scott, T. M.; Wardlaw, B. R.; Reese, R. S.; Blair, J. L.

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Year Published: 1999

The Central Great Lakes Geologic Mapping Coalition

The State Geological Surveys of Illinois, Indiana, Michigan, and Ohio joined with the U.S. Geological Survey (USGS, under the Earth Surface Dynamics Program) to form the Central Great Lakes Geologic Mapping Coalition. These four States have a similar geologic heritage and need to address common societal issues about...

The Central Great Lakes Geologic Mapping Coalition; 1999; FS; 153-99; Geological Survey (U.S.)

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Year Published: 1999

Sustainable growth in America's heartland: 3-D geologic maps as the foundation

The Central Great Lakes States of Illinois, Indiana, Michigan, and Ohio constitute one of the most productive and economically important regions in the country—America’s heartland. The agriculture, industry, business, recreation, and ecology of these States are based on a common geologic heritage. During the last 1.8 million years, glaciers...

Sustainable growth in America's heartland; 3-D geologic maps as the foundation; 1999; CIR; 1190; Central Great Lakes Geologic Mapping Coalition; Illinois State Geological Survey; Indiana Geological Survey; Michigan Geological Survey Division; Ohio Division of Geological Survey; U. S. Geological Survey

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Year Published: 1999

Historical trends in salinity and substrate in central and northern Florida Bay: A Paleoecological Reconstruction using modern analogue data

Understanding the natural spatial and temporal variability that exists within an ecosystem is a critical component of efforts to restore systems to their natural state. Analysis of benthic foraminifers and molluscs from modern monitoring sites within Florida Bay allows us to determine what environmental parameters control spatial and temporal...

Wingard, G. Lynn; Ishman, Scott E.

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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.

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Year Published: 1998

Lithostratigraphy, petrography, biostratigraphy, and strontium-isotope stratigraphy of the surficial aquifer system of western Collier County, Florida

In 1996, seven cores were recovered in western Collier County, southwestern Florida, to acquire subsurface geologic and hydrologic data to support ground-water modeling efforts. This report presents the lithostratigraphy, X-ray diffraction analyses, petrography, biostratigraphy, and strontium-isotope stratigraphy of these cores. The oldest...

Edwards, Lucy E.; Weedman, S.D.; Simmons, Kathleen; Scott, T.M.; Brewster-Wingard, G. L.; Ishman, S.E.; Carlin, N.M.
Lithostratigraphy, petrography, biostratigraphy, and strontium-isotope stratigraphy of the surficial aquifer system of western Collier County, Florida; 1998; OFR; 98-205; Edwards, L. E.; Weedman, S. D.; Simmons, R.; Scott, T. M.; Brewster-Wingard, G. L.; Ishman, S. E.; Carlin, N. M.

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Year Published: 1998

U.S. Geological Survey Middle Rio Grande Basin Study: Proceedings of the second annual workshop, Albuquerque, New Mexico, February 10-11, 1998

No abstract available.

Slate, J.L.
U.S. Geological Survey Middle Rio Grande Basin Study; proceedings of the second annual workshop, Albuquerque, New Mexico, February 10-11, 1998; 1998; OFR; 98-337; edited by Slate, J. L.

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Year Published: 1998

Biostratigraphy and physical stratigraphy of the USGS-Cannon Park core (CHN-800), Charleston County, South Carolina

No abstract avavilable.

Bybell, Laurel M.; Conlon, Kevin J.; Edwards, Lucy E.; Frederiksen, N.O.; Gohn, Gregory; Self-Trail, Jean M.
Biostratigraphy and physical stratigraphy of the USGS-Cannon Park core (CHN-800), Charleston County, South Carolina; 1998; OFR; 98-246; Bybell, L. M.; Conlon, K. J.; Edwards, L. E.; Frederiksen, N. O.; Gohn, G. S.; Self-Trail, J. M.

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Year Published: 1998

Preliminary lithostratigraphy, interpreted geophysical logs and hydrogeologic characteristics of the 98th Street core hole, Albuquerque, New Mexico

Core samples, cuttings, and numerous geophysical logs obtained from the 1560 ft (475.5 m) core hole drilled at 98th Street on the west side of Albuquerque provide key stratigraphic and hydraulicproperty information for the upper clastic sediments of the Santa Fe Group, which form the principal aquifer in the region. The core hole and an adjacent...

Stone, Byron D.; Allen, Bruce D.; Mikolas, Marlo; Haneberg, William C.; Hawley, John W.; Johnson, Peggy S.; Alfred, Barry; Thorn, Conde R.
Preliminary lithostratigraphy, interpreted geophysical logs and hydrogeologic characteristics of the 98th Street core hole, Albuquerque, New Mexico; 1998; OFR; 98-210; Stone, B. D.; Allen, B. D.; Mikolas, Marlo; Hawley, J. W.; Haneberg, W. C.; Johnson, P. S.; Alfred, Barry; Thorn, C. R.