Publications
These publications showcase the significant science conducted in our Science Centers.
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Seismic expression of the Chesapeake Bay impact crater: Structural and morphologic refinements based on new seismic data Seismic expression of the Chesapeake Bay impact crater: Structural and morphologic refinements based on new seismic data
This work refines previous interpretations of the structure and morphology of the Chesapeake Bay impact crater on the basis of more than 1,200 km of multichannel and single-channel seismic reflection profiles collected in the bay and on the adjacent continental shelf. The outer rim, formed in sedimentary rocks, is irregularly circular, with an average diameter of ~85 km. A 20–25-km-wide...
Authors
C. Wylie Poag, Deborah R. Hutchinson, Steve M. Colman, Myung W. Lee
Modern accumulation rates and a sediment budget for the Eel shelf: a flood-dominated depositional environment Modern accumulation rates and a sediment budget for the Eel shelf: a flood-dominated depositional environment
The northern California continental margin is periodically impacted by geologically significant storms, which have a marked influence on terrigenous sediment supply, flood deposition, and long-term accumulation of fine-grained sediment on the Eel shelf. Accumulation of Eel River muds on the adjacent shelf was investigated using 210Pb and 137Cs geochronologies, in order to understand the...
Authors
Christopher K. Sommerfield, Charles A. Nittrouer
The Columbia River littoral cell: A sediment budget overview The Columbia River littoral cell: A sediment budget overview
No abstract available.
Authors
G. Gelfenbaum, C. R. Sherwood, C. D. Peterson, G. M. Kaminsky, Maarten C. Buijsman, D.C. Twichell, P. Ruggiero, A. E. Gibbs, C. Reed
Progress of environmental studies in coal mining areas of western Pennsylvania and central West Virginia Progress of environmental studies in coal mining areas of western Pennsylvania and central West Virginia
Two studies related to the regional environmental effects of coal mining in the Appalachian Plateau were conducted in 1998 as part of the National Water‐Quality Assessment program of the U.S. Geological Survey. The study area of about 20,000 square miles included parts of the Allegheny and Monongahela River basins in the north and the Kanawha River basin in the south. Water in domestic...
Authors
James H. Eychaner
Tracing sediment dispersal on nourished beaches: Two case studies Tracing sediment dispersal on nourished beaches: Two case studies
The event- to decade-scale patterns of sediment dispersal on two artificially nourished beaches have been mapped using a combination of geophysical surveys, closely-spaced vibracores, and repeated beach profiles. At both Wrightsville Beach, NC and Folly Island, SC the sediment used for beach nourishment is macroscopically distinct from native sediment and can be used to identify sediment...
Authors
E. Robert Thieler, Paul T. Gayes, William C. Schwab, M. Scott Harris
Robustness of closed capture-recapture methods to violations of the closure assumption Robustness of closed capture-recapture methods to violations of the closure assumption
Closed-population capture–recapture methods have been used extensively in animal ecology, both by themselves and within the context of Pollock’s robust design and multistate models, to estimate various parameters of population and community dynamics. The defining assumption of geographic and demographic closure (i.e., no births, deaths, immigration, or emigration) for the duration of...
Authors
William L. Kendall
Time-series photographs of the sea floor in western Massachusetts Bay: June - October, 1996 Time-series photographs of the sea floor in western Massachusetts Bay: June - October, 1996
No abstract available.
Authors
Bradford Butman, John Evans, William Lange, Chris F. Polloni
A geochemical isotopic (Nd-Pb) comparison of volcanic rocks erupted during the last 3,550 yrs. B.P. of interplinian activity of Somma-Vesuvius Volcano, southern Italy A geochemical isotopic (Nd-Pb) comparison of volcanic rocks erupted during the last 3,550 yrs. B.P. of interplinian activity of Somma-Vesuvius Volcano, southern Italy
No abstract available.
Authors
Renato Somma, Robert A. Ayuso, B. de Vivo
Mississippi Basin Carbon Project; upland soil database for sites in Yazoo Basin, northern Mississippi Mississippi Basin Carbon Project; upland soil database for sites in Yazoo Basin, northern Mississippi
The conversion of land from its native state to an agricultural use commonly results in a significant loss of soil carbon (Mann, 1985; Davidson and Ackerman, 1993). Globally, this loss is estimated to account for as much as 1/3 of the net CO2 emissions for the period of 1850 to 1980 (Houghton et al, 1983). Roughly 20 to 40 percent of original soil carbon is estimated to be lost as CO2 as...
Authors
J.W. Harden, T. L. Fries, T.G. Huntington
Great earthquakes, abundant sand, and high wave energy in the Columbia Cell, USA Great earthquakes, abundant sand, and high wave energy in the Columbia Cell, USA
No abstract available.
Authors
Curt D. Peterson, Guy R. Gelfenbaum, Harry M. Jol, Jim B. Phipps, Frank Reckendorf, Dave C. Twichell, Sandy Vanderberg, Lorraine Woxell
Pennsylvania Pennsylvania
No abstract available
Authors
Water Resources Division U.S. Geological Survey
Cobalt-rich ferromanganese crusts in the Pacific Cobalt-rich ferromanganese crusts in the Pacific
Co-rich Fe-Mn crusts occur throughout the Pacific on seamounts, ridges, and plateaus where currents have kept the rocks swept clean of sediments at least intermittently for millions of years. Crusts precipitate out of cold ambient sea water onto hard-rock substrates forming pavements up to 250 mm thick. Crusts are important as a potential resource for Co, Ni, Pt, Mn, Tl, Te, and other...
Authors
James R. Hein, Andrea Koschinsky, Michael Bau, Frank T. Manheim, Jung-Keuk Kang, Leanne Roberts