Publications
Filter Total Items: 825
High-resolution seismic-reflection image of the Chesapeake Bay impact structure, NASA Langley Research Center, Hampton, Virginia
A 1-kilometer-long (0.62-mile-long) seismic reflection and refraction profile collected at the National Aeronautics and Space Administration (NASA) Langley Research Center, Hampton, Va., provides a detailed image of part of the annular trough of the buried, 35-million-year-old Chesapeake Bay impact structure. This profile passes within 5 meters (m; 16.4 feet (ft)) of a 635.1-m-deep (2,083.8-ft-dee
Authors
Rufus D. Catchings, David S. Powars, Gregory Gohn, Mark R. Goldman
Paleontology of the upper Eocene to quaternary postimpact section in the USGS-NASA Langley core, Hampton, Virginia
The USGS-NASA Langley corehole was drilled in 2000 in Hampton, Va. The core serves as a benchmark for the study of calcareous nannofossils, dinoflagellates, diatoms and silico flagellates, mollusks, ostracodes, planktonic foraminifera and bolboformids, and vertebrate remains in the upper Eocene, Oligocene, Miocene, and Pliocene sediments in southeastern Virginia. These sediments were deposited aft
Authors
Lucy E. Edwards, John A. Barron, David Bukry, Laurel M. Bybell, Thomas M. Cronin, C. Wylie Poag, Robert E. Weems, G. Lynn Wingard
Studies of the Chesapeake Bay impact structure: The USGS-NASA Langley corehole, Hampton, Virginia, and related coreholes and geophysical surveys
No abstract available.
Authors
J. Wright Horton, David S. Powars, Gregory S. Gohn
Head-bobbing behavior in foraging whooping cranes favors visual fixation
No abstract available.
Authors
Thomas M. Cronin, Matthew R. Kinloch, Glenn H. Olsen
North American Commission on stratigraphic nomenclature
No abstract available.
Authors
R. M. Easton, J.O. Jones, A.C. Lenz, Ismael Ferrusquia-Villafranca, E. A. Mancini, Bruce R. Wardlaw, Lucy E. Edwards, B.R. Pratt
Taxonomic revision and stratigraphic provenance of 'Histiophorus rotundu' Woodward 1901 (Teleostei, Perciformes)
Until recently, †Histiophorus rotundus Woodward 1901, was known from a single, poorly preserved rostrum from the Tertiary phosphate beds near Charleston, South Carolina, an area from which many fossils have been described. The specimen is relatively featureless externally; its internal anatomy is unknown and the documentation of its geological provenance was poor. In an earlier revision the specie
Authors
K. A. Monsch, H. L. Fierstine, Robert E. Weems
Cascading ecological effects of low-level phosphorus enrichment in the Florida Everglades
Few studies have examined long-term ecological effects of sustained low-level nutrient enhancement on wetland biota. To determine sustained effects of phosphorus (P) addition on Everglades marshes we added P at low levels (5, 15, and 30 μg L−1 above ambient) for 5 yr to triplicate 100-m flow-through channels in pristine marsh. A cascade of ecological responses occurred in similar sequence among tr
Authors
Evelyn Gaiser, Joel C. Trexler, Jennifer Richards, Daniel L. Childers, David Lee, A. L. Edwards, Leonard J. Scinto, Krish Jayachandran, Gregory Noe, Ronald D. Jones
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 multiple overgrowth zones, some of which are adjacent and parallel to elongate cores. Sensitive high-resolution ion microprobe (SHR
Authors
John N. Aleinikoff, J. Wright Horton,, Avery A. Drake, R. P. Wintsch, C.M. Fanning, K. Yi
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 natural system must be determined. In addition, the
Authors
G. Lynn Wingard, Thomas M. Cronin, Charles W. Holmes, Debra A. Willard, Gary S. Dwyer, Scott E. Ishman, William Orem, Christopher P. Williams, Jessica Albietz, Christopher E. Bernhardt, Carlos A. Budet, Bryan Landacre, Terry Lerch, Marci Marot, Ruth E. Ortiz
Bedrock geologic map of the New Milford quadrangle, Litchfield and Fairfield Counties, Connecticut
The bedrock geology of the New Milford quadrangle, Litchfield and Fairfield Counties, Connecticut is described in this report. The database includes contacts of bedrock geologic units, faults, outcrops, structural geologic information, and photos.
Authors
Gregory J. Walsh
ICDP-USGS workshop on deep drilling in the central Crater of the Chesapeake Bay impact structure, Virginia, USA: Proceedings volume
No abstract available.
Authors
Lucy E. Edwards, J. Wright Horton, Gregory S. Gohn
Atlas of pollen and spores of the Florida Everglades
An illustrated, descriptive atlas of pollen and spores from wetland plants of the Florida Everglades was compiled to facilitate identification of dispersed palynomorphs in sediments. The atlas includes 121 wetland species characteristic of eleven plant associations of the Florida Everglades including sloughs, sawgrass marshes, tree islands, wet prairies, cypress domes, mangrove forests, salt marsh
Authors
Debra A. Willard, Christopher E. Bernhardt, Lisa M. Weimer, S. R. Cooper, Desire Gamez, Jennifer Jensen