Florence Bascom Geoscience Center

Publications

Filter Total Items: 557
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Year Published: 2006

Benthic foraminifera from a relict flood tidal delta along the Virginia/North Carolina Outer Banks

Examination of benthic foraminifera from six vibracores collected from a relict flood tidal delta near the Virginia/North Carolina border documents the assemblages associated with a former inlet and provides geologic evidence of this former inlet that once defined the boundary between Virginia and North Carolina along the Outer Banks. Three...

Robinson, Marci M.; McBride, R.A.

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Year Published: 2006

A cyclostratigraphic and borehole-geophysical approach to development of a three-dimensional conceptual hydrogeologic model of the karstic Biscayne aquifer, southeastern Florida

A fundamental problem in the simulation of karst ground-water flow and solute transport is how best to represent aquifer heterogeneity as defined by the spatial distribution of porosity, permeability, and storage. Combined analyses of cyclostratigraphy, including lithofacies and depositional environments, and borehole-geophysical logs, has...

Cunningham, Kevin J.; Wacker, Michael A.; Robinson, Edward; Dixon, Joann F.; Wingard, G. Lynn
A cyclostratigraphic and borehole-geophysical approach to development of a three-dimensional conceptual hydrogeologic model of the karstic Biscayne aquifer, southeastern Florida; 2006; SIR; 2005-5235; Cunningham, Kevin J.; Wacker, Michael A.; Robinson, Edward; Dixon, Joann F.; Wingard, G. Lynn

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Year Published: 2006

The geochemical record of the last 17,000 years in the Guaymas Basin, Gulf of California

Sediments deposited on the western slope of the Guaymas Basin in the central Gulf of California are composed predominantly of detrital clastic material and biogenic silica (biopal), with minor organic material (average of 2.8% organic carbon) and calcium carbonate. The CaCO3 is derived from calcareous plankton and is highly variable ranging...

Dean, Walter E.

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Year Published: 2006

Geology of Delaware Water Gap National Recreation Area, New Jersey-Pennsylvania

Many of the parks within the National Park System owe their uniqueness to their geologic framework. Their scenery is the result of diverse natural processes acting upon a variety of rocks that were deposited in varied environments in the geologic past. The Delaware Water Gap National Recreation Area (DEWA) contains a rich geologic and cultural...

Epstein, Jack B.

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Year Published: 2006

Application of carbonate cyclostratigraphy and borehole geophysics to delineate porosity and preferential flow in the karst limestone of the Biscayne aquifer, SE Florida

Combined analyses of cores, borehole geophysical logs, and cyclostratigraphy produced a new conceptual hydrogeologic framework for the triple-porosity (matrix, touching-vug, and conduit porosity) karst limestone of the Biscayne aquifer in a 0.65 km2 study area, SE Florida. Vertical lithofacies successions, which have recurrent stacking patterns,...

Cunningham, Kevin J.; Renken, Robert A.; Wacker, Michael A.; Zygnerski, M.R.; Robinson, E.; Shapiro, Allen M.; Wingard, G. Lynn

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Year Published: 2006

Distribution, 14C chronology, and paleomagnetism of latest Pleistocene and Holocene lava flows at Haleakala volcano, Island of Maui, Hawai'i: A revision of lava flow hazard zones

New mapping and 60 new radiocarbon ages define the age and distribution of latest Pleistocene and Holocene (past 13,000 years) lava flows at Haleakalā volcano, Island of Maui. Paleomagnetic directions were determined for 118 sites, of which 89 are in lava flows younger than 13,000 years. The paleomagnetic data, in conjunction with a reference...

Sherrod, David R.; Hagstrum, Jonathan T.; McGeehin, John P.; Champion, Duane E.; Trusdell, Frank A.

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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: 2005

North American Commission on stratigraphic nomenclature

No abstract available.

Easton, R. M.; Jones, J.O.; Lenz, A.C.; Ferrusquia-Villafranca, Ismael; Mancini, E.A.; Wardlaw, Bruce R.; Edwards, Lucy E.; Pratt, B.R.

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Year Published: 2004

Deciphering multiple Mesoproterozoic and Paleozoic events recorded in zircon and titanite from the Baltimore Gneiss, Maryland: SEM imaging, SHRIMP U-Pb geochronology, and EMP analysis

The Baltimore Gneiss, exposed in antiforms in the eastern Maryland Piedmont, consists of a suite of felsic and mafic gneisses of Mesoproterozoic age. Zircons from the felsic gneisses are complexly zoned, as shown in cathodoluminescence imaging; most zircon grains have ...

Aleinikoff, John N.; Horton, J. Wright; Drake, Avery A.; Wintsch, R. P.; Fanning, C.M.; Yi, K.

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Year Published: 2004

Ecosystem history of southern and central Biscayne Bay: Summary report on sediment core analyses - year two

The Comprehensive Everglades Restoration Plan (CERP) lists restoration of the timing, quantity, and quality of the natural flow of freshwater as one its primary goals. Before restoration can occur, however, the baseline conditions of the environment prior to significant human alteration must be established and the range of variation within the...

Wingard, G. Lynn; Cronin, Thomas M.; Holmes, Charles W.; Willard, Debra A.; Dwyer, Gary S.; Ishman, Scott E.; Orem, William; Williams, Christopher P.; Albietz, Jessica; Bernhardt, Christopher E.; Budet, Carlos A.; Landacre, Bryan; Lerch, Terry; Marot, Marci; Ortiz, Ruth E.
Ecosystem history of southern and central Biscayne Bay: summary report on sediment core analyses - year two; 2004; OFR; 2004-1312; Wingard, G. Lynn; Cronin, Thomas M.; Holmes, Charles W.; Willard, Debra A.; Dwyer, Gary; Ishman, Scott E.; Orem, William; Williams, Christopher P.; Albietz, Jessica; Bernhardt, Christopher E.; Budet, Carlos A.; Landacre, Bryan; Lerch, Terry; Marot, Marci; Ortiz, Ruth E.

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Year Published: 2004

Supergroup stratigraphy of the Atlantic and Gulf Coastal Plains (Middle? Jurassic through holocene, Eastern North America)

An inclusive supergroup stratigraphic framework for the Atlantic and Gulf Coastal Plains is proposed herein. This framework consists of five supergroups that 1) are regionally inclusive and regionally applicable, 2) meaningfully reflect the overall stratigraphic and structural history of the Coastal Plains geologic province of the southeastern...

Weems, Robert E.; Self-Trail, Jean M.; Edwards, Lucy E.

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Year Published: 2004

Characterization of aquifer heterogeneity using cyclostratigraphy and geophysical methods in the upper part of the Karstic Biscayne Aquifer, Southeastern Florida

This report identifies and characterizes candidate ground-water flow zones in the upper part of the shallow, eogenetic karst limestone of the Biscayne aquifer in the Lake Belt area of north-central Miami-Dade County using cyclostratigraphy, ground-penetrating radar (GPR), borehole geophysical logs, and continuously drilled cores. About 60 miles of...

Cunningham, Kevin J.; Carlson, Janine L.; Wingard, G. Lynn; Robinson, Edward; Wacker, Michael A.
Characterization of aquifer heterogeneity using Cyclostratigraphy and geophysical methods in the upper part of the Karstic Biscayne Aquifer, Southeastern Florida; 2004; WRI; 2003-4208; Cunningham, Kevin J.; Carlson, Janine L.; Wingard, G. Lynn; Robinson, Edward; Wacker, Michael A.