Publications
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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
Relationship between porphyry systems, crustal preservation levels, and amount of exploration in magmatic belts of the Central Tethys Region
Tectonic, geologic, geochemical, geochronologic, and ore deposit data from the U.S. Geological Survey-led assessment of 26 porphyry belts identified in the central Tethys region of Turkey, the Caucasus, Iran, western Pakistan, and southern Afghanistan relate porphyry mineralization to the tectonomagmatic evolution of the region and associated subduction and postsubduction processes. However, uplif
Authors
Lukas Zürcher, Jane M. Hammarstrom, John C. Mars, Stephen Ludington, Michael L. Zientek
Select airborne techniques for mapping and problem solving: Chapter 30
No abstract available.
Authors
Andrea Donnellan, Ramon Arrowsmith, Victoria E. Langenheim
Regional and local correlations of feldspar geochemistry of the Peach Spring Tuff, Alvord Mountain, California
The chemical composition of feldspar grains in an ignimbrite from the Spanish Canyon Formation in the Alvord Mountain area, California, have been used to confirm similarities in three measured sections locally, and they are similar to exposures of the Peach Spring Tuff (PST) regionally. Feldspar grains were identified on the basis of texture (zoning, as mantled feldspars, or in crystal clusters),
Authors
David C. Buesch
Cumberland-Marlboro basin basement drilling results – 2015: Cumberland, Hoke and Scotland counties, North Carolina
No abstract available
Authors
Jeffrey C. Reid, James L. Coleman, Kenneth B. Taylor, Katherine J. Marciniak, Walter T. Haven, Ryan A. Channell, Chandler I. Warner
Analysis and interpretation of stress indicators in deviated wells of the Coso Geothermal Field
Characterizing the tectonic stress field is an integral part of the development of hydrothermal systems and especially for enhanced geothermal systems (EGS). With a well characterized stress field the propensity of fault slip on faults with known location and orientation can be identified. Faults that are critically oriented for faulting with respect to the stress field are known to provide natura
Authors
Martin Schoenball, Jonathan M. G. Glen, Nicholas C. Davatzes