Publications
Filter Total Items: 921
Lithostratigraphy, petrography, biostratigraphy, and strontium-isotope stratigraphy of the surficial aquifer system of western Collier County, Florida 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 unit encountered in the study cores is an...
Authors
Lucy E. Edwards, S.D. Weedman, Kathleen Simmons, T.M. Scott, G. L. Brewster-Wingard, S. E. Ishman, N.M. Carlin
Geology of the Black Mingo Group (Paleocene) in the Kingstree and St. Stephen areas of South Carolina Geology of the Black Mingo Group (Paleocene) in the Kingstree and St. Stephen areas of South Carolina
Paleocene vertebrate remains from the areas of Kingstree and St. Stephen, South Carolina, come from the Rhems and Williamsburg formations of the Black Mingo Group. Sedimentary textures and fossils indicate that both units accumulated in shallow, nearshore marine, lagoonal, and deltaic depositional environments. Calcareous nannofossils and dinoflagellates indicate that the vertebrate...
Authors
Robert E. Weems, Laurel M. Bybell
Preliminary lithostratigraphy, interpreted geophysical logs and hydrogeologic characteristics of the 98th Street core hole, Albuquerque, New Mexico 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 water-level monitoring well were drilled...
Authors
Byron D. Stone, Bruce D. Allen, Marlo Mikolas, William C. Haneberg, John W. Hawley, Peggy S. Johnson, Barry Alfred, Conde R. Thorn
Preliminary paleontologic report on core 37 from Pass Key, Everglades National Park, Florida Bay Preliminary paleontologic report on core 37 from Pass Key, Everglades National Park, Florida Bay
Sediments from Pass Key core 37, in eastern Florida Bay (N 25.1478, W 80.5745) record a history of rapid sedimentation during this century. The lowest portion of the core contains benthic fauna indicative of relatively low salinities and sparse seagrass coverage. This period is followed by an increase in salinity and seagrass. In the middle portion of the core, a slight decrease in...
Authors
G. L. Brewster-Wingard, S. E. Ishman, N.J. Waibel, Debra A. Willard, Lucy E. Edwards, C. W. Holmes
Environmental impacts on the southern Florida coastal waters: A history of change in Florida Bay Environmental impacts on the southern Florida coastal waters: A history of change in Florida Bay
Analyses of four cores located in the northern transitional, eastern, and central portions of Florida Bay reveal historical patterns of change in salinity and seagrass distribution. Salinity and the distribution of seagrass beds are two critical issues for the restoration of Florida Bay. The distribution of benthic fauna in Bob Allen 6A and Russell Bank 19B cores illustrates changes in
Authors
G. Lynn Wingard, S. E. Ishman, C. W. Holmes
Digital and preliminary bedrock geologic map of the Mount Carmel quadrangle, Vermont Digital and preliminary bedrock geologic map of the Mount Carmel quadrangle, Vermont
No abstract available.
Authors
Nicholas M. Ratcliffe, Gregory J. Walsh
Digital bedrock geologic map of the Mount Carmel 7.5 x 15 minute quadrangle, Vermont Digital bedrock geologic map of the Mount Carmel 7.5 x 15 minute quadrangle, Vermont
No abstract available.
Authors
Nicholas M. Ratcliffe, Gregory J. Walsh
Digital and preliminary bedrock geologic map of the Pico Peak quadrangle, Vermont Digital and preliminary bedrock geologic map of the Pico Peak quadrangle, Vermont
No abstract available.
Authors
Gregory J. Walsh, Nicholas M. Ratcliffe
Ground-water discharge and base-flow nitrate loads of nontidal streams, and their relation to a hydrogeomorphic classification of the Chesapeake Bay watershed, middle Atlantic Coast Ground-water discharge and base-flow nitrate loads of nontidal streams, and their relation to a hydrogeomorphic classification of the Chesapeake Bay watershed, middle Atlantic Coast
Existing data on base-flow and groundwater nitrate loads were compiled and analyzed to assess the significance of groundwater discharge as a source of the nitrate load to nontidal streams of the Chesapeake Bay watershed. These estimates were then related to hydrogeomorphic settings based on lithology and physiographic province to provide insight on the areal distribution of ground-water...
Authors
L. Joseph Bachman, Bruce D. Lindsey, John W. Brakebill, David S. Powars