Publications
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Paleomagnetic record determined in cores from deep research wells in the Quaternary Santa Clara basin, California
Paleomagnetic study of cores from six deep wells provides an independent temporal framework for much of the alluvial stratigraphy of the Quaternary basin beneath the Santa Clara Valley. This stratigraphy consists of 8 upward-fining cycles in the upper 300 m of section and an underlying 150 m or more of largely fine-grained sediment. The eight cycles have been correlated with the marine oxygen isot
Authors
Edward A. Mankinen, Carl M. Wentworth
Copper speciation in variably toxic sediments at the Ely Copper Mine, Vermont, United States
At the Ely Copper Mine Superfund site, Cu concentrations exceed background values in both streamwater (160–1200 times) and sediments (15–79 times). Previously, these sediment samples were incubated with laboratory test organisms, and they exhibited variable toxicity for different stream sites. In this study we combined bulk- and microscale techniques to determine Cu speciation and distribution in
Authors
Bryn E. Kimball, Andrea L. Foster, Robert R. Seal, Nadine M. Piatak, Samuel M. Webb, Jane M. Hammarstrom
Uncertainty in CO2 storage cost and resource estimates
Carbon capture from stationary sources and geological storage of anthropogenic carbon dioxide (CO2) is an important option to include in strategies for the mitigation of greenhouse gas (GHG) emissions. However, the potential costs of commercial-scale CO2storage are not well constrained, stemming from the inherent uncertainty in current geologic storage resource estimates coupled with a lack of det
Authors
Steven T. Anderson
Pre-Mississippian tectonic affinity across the Canada Basin–Arctic margins of Alaska and Canada
New and reprocessed seismic reflection data on the Alaskan and Canadian Arctic margins of the Canada Basin, together with geologic constraints from exploration wells and outcrops, reveal structural and stratigraphic relationships in pre-Mississippian rocks that constrain models of Canada Basin opening. Lithostratigraphic age and acoustic character indicate that the Devonian and older passive-margi
Authors
David W. Houseknecht, Christopher D. Connors
Some contrasting biostratigraphic links between the Baker and Olds Ferry Terranes, eastern Oregon
New stratigraphic and paleontologic data indicate that ophiolitic melange windows in the Olds Ferry terrane of eastern Oregon contain limestone blocks and chert that are somewhat different in age than those present in the adjacent Baker terrane melange. The melange windows in the Olds Ferry terrane occur as inliers in the flyschoid Early and Middle Jurassic age Weatherby Formation, which depositio
Authors
Merlynd K. Nestell, Charles D. Blome
Geologic and geophysical maps and volcanic history of the Kelton Pass SE and Monument Peak SW Quadrangles, Box Elder County, Utah
The Kelton Pass SE and Monument Peak SW 7.5' quadrangles are located in Box Elder County, northwestern Utah (figure 1; plate 1). The northern boundary of the map area is 8.5 miles (13.7 km) south of the Utah-Idaho border, and the southern boundary reaches the edge of mud flats at the north end of Great Salt Lake. Elevations range from 4218 feet (1286 m) along the mud flats to 5078 feet (1548 m) in
Authors
Tracey J. Felger, David M. Miller, Victoria E. Langenheim, Robert J. Fleck
Collaborative Studies for Mercury Characterization in Coal and Coal Combustion Products, Republic of South Africa
Mercury (Hg) analyses were obtained for 42 samples of feed coal provided by Eskom, the national electric utility of South Africa, representing all 13 coal-fired power stations operated by Eskom in South Africa. This sampling includes results for three older power stations returned to service starting in the late 2000s. These stations were not sampled in the most recent previous study. Mercury conc
Authors
Allan Kolker, Constance L. Senior, Chris van Alphen
Aptian ‘Shale Gas’ Prospectivity in the Downdip Mississippi Interior Salt Basin, Gulf Coast, USA
This study evaluates regional ‘shale gas’ prospectivity of the Aptian section (primarily Pine Island Shale) in the downdip Mississippi Salt Basin (MSB). Previous work by the U.S. Geological Survey estimated a mean undiscovered gas resource of 8.8 trillion cubic feet (TCF) in the chronostratigraphic-equivalent Pearsall Formation in the Maverick Basin of south Texas, where industry has established a
Authors
Paul C. Hackley, Brett J. Valentine, Catherine B. Enomoto, Celeste D. Lohr, Krystina R. Scott, Frank T. Dulong, Alana M. Bove
Regional geophysics of western Utah and eastern Nevada, with emphasis on the Confusion Range
As part of a long term geologic and hydrologic study of several regional
groundwater flow systems in western Utah and eastern Nevada, the U.S.
Geological Survey was contracted by the Southern Nevada Water Authority
to provide geophysical data. The primary object of these data was to enable
construction of the geological framework of the flow systems. The main
new geophysical data gathered du
Authors
Edward A. Mankinen, Peter D. Rowley, Gary L. Dixon, Edwin H. McKee
Paleogeographic implications of Late Miocene lacustrine and nonmarine evaporite deposits in the Lake Mead region: Immediate precursors to the Colorado River
Thick late Miocene nonmarine evaporite (mainly halite and gypsum) and related lacustrine limestone deposits compose the upper basin fill in half grabens within the Lake Mead region of the Basin and Range Province directly west of the Colorado Plateau in southern Nevada and northwestern Arizona. Regional relations and geochronologic data indicate that these deposits are late synextensional to poste
Authors
James E. Faulds, Charlotte Schreiber, Victoria E. Langenheim, Nicholas H. Hinz, Tom Shaw, Matthew T. Heizler, Michael E Perkins, Mohammed El Tabakh, Michael J. Kunk
Populations of concern
Climate change is already causing, and is expected to continue to cause, a range of health impacts that vary across different population groups in the United States. The vulnerability of any given group is a function of its sensitivity to climate change related health risks, its exposure to those risks, and its capacity for responding to or coping with climate variability and change. Vulnerable gr
Authors
Janet Gamble, John Balbus, Martha Berger, Karen Bouye, Vince Campbell, Karletta Chief, K. Conlon, Allison Crimmins, Barry Flanagan, C. Gonzalez-Maddux, E. Hallisey, S. Hutchins, L. Jantarasami, S. Khoury, M. Kiefer, J. Kolling, K. Lynn, A. Manangan, M. McDonald, R. Morello-Frosch, Margaret Hiza, P. Sheffield, K. Thigpen Tart, J. Watson, K.P. Whyte, A.F. Wolkin