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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Environmental contaminants and diving ducks in San Francisco Bay Environmental contaminants and diving ducks in San Francisco Bay
Concentrations of selenium, mercury, and cadmium were measured in surf scoters in San Francisco Bay to assess possible effects of contaminants on health or reproduction of diving ducks.
Authors
H. Ohlendorf, Katherine Marois, Roy Lowe, Thomas Harvey, P.R. Kelly
Evaluation of the pileated woodpecker HSI model Evaluation of the pileated woodpecker HSI model
No abstract available.
Authors
C.E. Keller
Falcons Falcons
Four species of Falco occur in the northeastern United States. The gyrfalcon is a rare winter visitor. The peregrine falcon federally listed as endangered, is a migrant and through reestablishment is breeding and wintering locally throughout the northeast. The merlin is a migrant and uncommon winter bird. The American kestrel breeds, winters, and migrates in the northeast. A 22-year...
Authors
L.S. Schueck, M.R. Fuller, W.S. Seegar
Formation resistivity as an indicator of the onset of oil generation in the Woodford Shale, Anadarko Basin, Oklahoma Formation resistivity as an indicator of the onset of oil generation in the Woodford Shale, Anadarko Basin, Oklahoma
The Upper Devonian and Lower Mississippian Woodford Shale is a black, organic-rich shale that is a major hydrocarbon source rock in the Anadarko basin. With the onset of oil generation, nonconductive hydrocarbons begin to replace conductive pore water in the Woodford, and formation resistivity increases. Crossplots of formation resistivity versus either vitrinite reflectance (RO) or...
Authors
James Schmoker, Timothy Hester
Geochemistry of oils and hydrocarbon source rocks, greater Anadarko Basin: evidence for multiple sources of oils and long-distance oil migration Geochemistry of oils and hydrocarbon source rocks, greater Anadarko Basin: evidence for multiple sources of oils and long-distance oil migration
Organic geochemical analyses of 104 crude oils and 190 core samples of dark-colored shales from the greater Anadarko basin show three major oil types which generally correlate with reservoir age and source-rock age. Analyses include C3-C30 whole-oil gas chromatography, C10+ saturated-hydrocarbon-fraction gas chromatography, and carbon stable isotopes (ppt relative to PDB) of saturated...
Authors
R.C. Burruss, J. Hatch
Geology of the Shortland basin region, central Solomons trough, Solomon Islands: review and new findings Geology of the Shortland basin region, central Solomons trough, Solomon Islands: review and new findings
No abstract available.
Authors
Terry Bruns, John Vedder, Alan Cooper
Habitat requirements and management of woodcock in the northeast: Assessment of knowledge and needs Habitat requirements and management of woodcock in the northeast: Assessment of knowledge and needs
No abstract available.
Authors
G.F. Sepik, D.G. McAuley, J. Longcore, E.L. Derleth
Horizontal stresses from well-bore breakouts and lithologies associated with their formation, Oklahoma and Texas Panhandle Horizontal stresses from well-bore breakouts and lithologies associated with their formation, Oklahoma and Texas Panhandle
Orientations of crustal stresses are inferred from stress-induced well-bore breakouts in three areas in the south-central United States: the eastern part of the Anadarko basin in central Oklahoma, the Marietta basin in south-central Oklahoma, and the Bravo dome area of the central Texas Panhandle. Inferred directions of maximum horizontal principal stress (SHmax) are ENE for the eastern...
Authors
Richard Dart
How to obtain information on nongame migratory birds: Patuxent Wildlife Research Center How to obtain information on nongame migratory birds: Patuxent Wildlife Research Center
No abstract available.
Authors
M.A. Howe, R.M. Erwin, M.R. Fuller, C.E. Keller, C.S. Robbins
Hydrologic studies of wetlands in the northern prairie Hydrologic studies of wetlands in the northern prairie
No abstract available.
Authors
Thomas Winter
Immunostimulation by levamisole in rainbow trout (Salmo gairdneri) in vivo Immunostimulation by levamisole in rainbow trout (Salmo gairdneri) in vivo
No abstract available at this time
Authors
D. Anderson, A.K. Siwicki, O. Dixon, E. Lizzio
In vitro assays for chemicals and drugs causing immunomodulation in fish In vitro assays for chemicals and drugs causing immunomodulation in fish
No abstract available at this time
Authors
D. Anderson, O. Dixon, A.K. Siwicki