Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16733
Environmental geochemistry at Red Mountain, an unmined volcanogenic massive sulphide deposit in the Bonnifield district, Alaska Range, east-central Alaska Environmental geochemistry at Red Mountain, an unmined volcanogenic massive sulphide deposit in the Bonnifield district, Alaska Range, east-central Alaska
The unmined, pyrite-rich Red Mountain (Dry Creek) deposit displays a remarkable environmental footprint of natural acid generation, high metal and exceedingly high rare earth element (REE) concentrations in surface waters. The volcanogenic massive sulphide deposit exhibits well-constrained examples of acid-generating, metal-leaching, metal-precipitation and self-mitigation (via co...
Authors
Robert G. Eppinger, Paul H. Briggs, Cynthia Dusel-Bacon, Stuart A. Giles, Larry P. Gough, Jane M. Hammarstrom, Bernard E. Hubbard
Estimating the amount of eroded section in a partially exhumed basin from geophysical well logs: An example from the North Slope Estimating the amount of eroded section in a partially exhumed basin from geophysical well logs: An example from the North Slope
The reconstruction of burial and thermal histories of partially exhumed basins requires an estimation of the amount of erosion that has occurred since the time of maximum burial. We have developed a method for estimating eroded thickness by using porosity-depth trends derived from borehole sonic logs of wells in the Colville Basin of northern Alaska. Porosity-depth functions defined from...
Authors
W. Matthew Burns, Daniel O. Hayba, Elisabeth L. Rowan, David W. Houseknecht
Geologic framework of the long bay inner shelf: implications for coastal evolution in South Carolina Geologic framework of the long bay inner shelf: implications for coastal evolution in South Carolina
The inner continental shelf off northern South Carolina is a sediment-limited environment characterized by extensive hardground areas, where coastal plain strata and ancient channel-fill deposits are exposed at the sea floor. Holocene sand is concentrated in large shoals associated with active tidal inlets, an isolated shore-detached sand body, and a widespread series of low-relief sand...
Authors
W. Barnhardt, J. Denny, W. Baldwin, W. Schwab, R. Morton, P. Gayes, N. Driscoll
Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA
The late Eocene Chesapeake Bay impact structure, located on the Atlantic margin of Virginia, may be Earth's best-preserved large impact structure formed in a shallow marine, siliciclastic, continental-shelf environment. It has the form of an inverted sombrero in which a central crater ∼40 km in diameter is surrounded by a shallower brim, the annular trough, that extends the diameter to...
Authors
J. Wright Horton,, Gregory Gohn, David S. Powars, Lucy E. Edwards
Persistent chlordane concentrations in long island sound sediment: Implications from chlordane, 210Pb, and 137Cs profiles Persistent chlordane concentrations in long island sound sediment: Implications from chlordane, 210Pb, and 137Cs profiles
Concentrations of chlordane, a banned termiticide and pesticide, were examined in recently collected surficial sediment (10 sites) and sediment cores (4 sites) in Long Island Sound (LIS).The highest chlordane concentrations were observed in western LIS, near highly urbanized areas. Chlordane concentrations did not decrease significantly in the past decade when compared to the data...
Authors
L. Yang, X. Li, John Crusius, U. Jans, M.E. Melcer, P. Zhang
The colonial ascidian Didemnum sp. A: current distribution, basic biology and potential threat to marine communities of the northeast and west coasts of North America The colonial ascidian Didemnum sp. A: current distribution, basic biology and potential threat to marine communities of the northeast and west coasts of North America
Didemnum sp. A is a colonial ascidian with rapidly expanding populations on the east and west coasts of North America. The origin of Didemum sp. A is unknown. Populations were first observed on the northeast coast of the U.S. in the late 1980s and on the west coast during the 1990s. It is currently undergoing a massive population explosion and is now a dominant member of many subtidal...
Authors
S.G. Bullard, G. Lambert, M.R. Carman, J. Byrnes, R.B. Whitlatch, G. Ruiz, R. J. Miller, L. Harris, P. C. Valentine, J.S. Collie, J. Pederson, D.C. McNaught, A.N. Cohen, R. G. Asch, J. Dijkstra, K. Heinonen
Modeling and mapping abundance of American Woodcock across the Midwestern and Northeastern United States Modeling and mapping abundance of American Woodcock across the Midwestern and Northeastern United States
We used an over-dispersed Poisson regression with fixed and random effects, fitted by Markov chain Monte Carlo methods, to model population spatial patterns of relative abundance of American woodcock (Scolopax minor) across its breeding range in the United States. We predicted North American woodcock Singing Ground Survey counts with a log-linear function of explanatory variables...
Authors
W.E. Thogmartin, J.R. Sauer, M. G. Knutson
Geologic characterization of shelf areas using usSEABED for GIS mapping, modeling processes and assessing marine sand and gravel resources Geologic characterization of shelf areas using usSEABED for GIS mapping, modeling processes and assessing marine sand and gravel resources
Geologic maps depicting offshore sedimentary features serve many scientific and applied purposes. Such maps have been lacking, but recent computer technology and software offer promise in the capture and display of diverse marine data. Continental margins contain landforms which provide a variety of important functions and contain important sedimentary records. Some shelf areas also...
Authors
S.J. Williams, J. D. Bliss, M.A. Arsenault, C.J. Jenkins, J.A. Goff
Magnesium compounds Magnesium compounds
Seawater and natural brines accounted for about 52 percent of U.S. magnesium compounds production in 2006. Dead-burned magnesia was produced by Martin Marietta Magnesia Specialties from well brines in Michigan. Caustic-calcined magnesia was recovered from sea-water by Premier Chemicals in Florida; from well brines in Michigan by Martin Marietta and Rohm and Haas; and from magnesite in...
Authors
D.A. Kramer
Assessment of Alternative Substrates for Culturing Lumbriculus variegatus Assessment of Alternative Substrates for Culturing Lumbriculus variegatus
The freshwater oligochaete, Lumbriculus variegatus, is tank-cultured to provide organisms for aquatic-habitat assessments, regeneration research and as a clean source of live food for aquarium fishes. Shredded paper is the typical substrate in cultures used to rear L. variegatus for these purposes. However, the effort needed to separate large numbers from decomposing paper can be...
Authors
P. J. Lasier
Winter behavior and ecology of the Alder Flycatcher (Empidonax alnorum) in Peru Winter behavior and ecology of the Alder Flycatcher (Empidonax alnorum) in Peru
The winter ecology and behavior of Alder Flycatchers (Empidonax alnorum) were studied along the Manu, a white-water meander river in Manu National Park, Madre de Dios, Peru during October and November, 1993 to 1997. The birds occupied territories in primary-succession habitats on growing point bars. They were most common in mixed stands of Tessaria integrifolia (Asteraceae) and Gynerium
Authors
M.S. Foster
Contaminant exposure and impacts on waterbirds and selected wildlife Contaminant exposure and impacts on waterbirds and selected wildlife
No abstract available.
Authors
Barnett A. Rattner