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Year Published: 2015

Geologic map of the Patagonia Mountains, Santa Cruz County, Arizona

The Patagonia Mountains contain two large porphyry Cu-Mo systems each with separate associated hypogene and supergene zones, two high-grade Cu-Mo breccia pipes, one large epithermal Ag-Pb-Zn-Mn deposit, and numerous additional areas of base- and precious-metal mineralization all zoned around a Laramide-age composite batholith of intermediate...

Graybeal, Frederick T.; Moyer, Lorre A.; Vikre, Peter G.; Dunlap, Pamela; Wallis, John C.
Graybeal, F.T., Moyer, L.A., Vikre, P.G., Dunlap, P., and Wallis, J.C., 2015, Geologic map of the Patagonia Mountains, Santa Cruz County, Arizona: U.S. Geological Survey Open-File Report 2015–1023, 10 p., 1 sheet, scale 1:48,000, http://dx.doi.org/10.3133/20151023.

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Year Published: 2015

Geologic map of the Bodie Hills, California and Nevada

The Bodie Hills covers about 1,200 km2 straddling the California-Nevada state boundary just north of Mono Lake in the western part of the Basin and Range Province, about 20 km east of the central Sierra Nevada. The area is mostly underlain by the partly overlapping, middle to late Miocene Bodie Hills volcanic field and Pliocene to late...

John, David A.; du Bray, Edward A.; Box, Stephen E.; Vikre, Peter G.; Rytuba, James J.; Fleck, Robert J.; Moring, Barry C.
John, D.A., du Bray, E.A., Box, S.E., Vikre, P.G., Rytuba, J.J., Fleck, R.J., and Moring, B.C., 2015, Geologic map of the Bodie Hills, California and Nevada: U.S. Geological Survey Scientific Investigations Map 3318, 64 p., 2 sheets, scale 1:50,000, http://dx.doi.org/10.3133/sim3318.

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Year Published: 2015

Natural or Induced: Identifying Natural and Induced Swarms from Pre-production and Co-production Microseismic Catalogs at the Coso Geothermal Field

Increased levels of seismicity coinciding with injection of reservoir fluids have prompted interest in methods to distinguish induced from natural seismicity. Discrimination between induced and natural seismicity is especially difficult in areas that have high levels of natural seismicity, such as the geothermal fields at the Salton Sea and Coso,...

Schoenball, Martin; Kaven, J. Ole; Glen, Jonathan M. G.; Davatzes, Nicholas C.
M. Schoenball, J.O. Kaven, J.M.G. Glen and N.C. Davatzes (2015), Natural or Induced: Identifying Natural and Induced Swarms from Pre-production and Coproduction Microseismic Catalogs at the Coso Geothermal Field. In 39th Workshop on Geothermal Reservoir Engineering, Stanford, California.

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Year Published: 2015

A summary of the late Cenozoic stratigraphic and tectonic history of the Santa Clara Valley, California

The late Cenozoic stratigraphic and tectonic history of the Santa Clara Valley illustrates the dynamic nature of the North American–Pacific plate boundary and its effect on basin and landscape development. Prior to early Miocene time, the area that became Santa Clara Valley consisted of eroding Franciscan complex basement structurally interleaved...

Langenheim, V.E.; Jachens, Robert C.; Wentworth, Carl M.; Graymer, Russell W.; Stanley, Richard G.; McLaughlin, Robert J.; Simpson, Robert W.; Williams, Robert A.; Andersen, D. W.; Ponce, David A.

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Year Published: 2015

Composite Sunrise Butte pluton: Insights into Jurassic–Cretaceous collisional tectonics and magmatism in the Blue Mountains Province, northeastern Oregon

The composite Sunrise Butte pluton, in the central part of the Blue Mountains Province, northeastern Oregon, preserves a record of subduction-related magmatism, arc-arc collision, crustal thickening, and deep-crustal anatexis. The earliest phase of the pluton (Desolation Creek unit) was generated in a subduction zone environment, as the oceanic...

Johnson, Kenneth H.; Schwartz, J.J.; Žák, Jiří; Verner, Krystof; Barnes, Calvin G.; Walton, Clay; Wooden, Joseph L.; Wright, James E.; Kistler, Ronald W.

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Year Published: 2015

Corrigendum to “Comparing activated alumina with indigenous laterite and bauxite as potential sorbents for removing fluoride from drinking water in Ghana” [Appl. Geochem. 56 (2015) 50–66]

The authors regret that the application of the t-plot to determine the presence of micropores in the three sorbents needs the following corrections: (1) Fig. 1a, c, e are N2(g) adsorption and desorption isotherms” (remove “BET”). This correction applies to descriptions in the text as well. (2) Table 2, the column titled “...

Craig, Laura; Stillings, Lisa; Decker, David L.; Thomas, James M.
Laura Craig, Lisa L. Stillings, David L. Decker, James M. Thomas, Corrigendum to “Comparing activated alumina with indigenous laterite and bauxite as potential sorbents for removing fluoride from drinking water in Ghana” [Appl. Geochem. 56 (2015) 50–66], Applied Geochemistry, Volume 63, 2015, Page 451, ISSN 0883-2927, http://dx.doi.org/10.1016/j.apgeochem.2015.06.016. (http://www.sciencedirect.com/science/article/pii/S0883292715001729)

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Year Published: 2015

Provenance and detrital zircon geochronologic evolution of lower Brookian foreland basin deposits of the western Brooks Range, Alaska, and implications for early Brookian tectonism

The Upper Jurassic and Lower Cretaceous part of the Brookian sequence of northern Alaska consists of syntectonic deposits shed from the north-directed, early Brookian orogenic belt. We employ sandstone petrography, detrital zircon U-Pb age analysis, and zircon fission-track double-dating methods to investigate these deposits in a succession of...

Moore, Thomas E.; O'Sullivan, Paul B.; Potter, Christopher J.; Donelick, Raymond A.

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Year Published: 2015

Reconnaissance coal study in the Susitna basin, 2014

The Alaska Division of Geological & Geophysical Surveys (DGGS) conducted fieldwork during the summer of 2014 in the Susitna basin as part of an ongoing evaluation of the hydrocarbon potential of frontier basins, particularly those near the Railbelt region (for example, Decker and others, 2013; Gillis and others, 2013). Topical studies...

David L. LePain; Stanley, Richard G.; Harun, Nina T.; Helmold, Kenneth T.; Tsigonis, Rebekah

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Year Published: 2015

Structural superposition in fault systems bounding Santa Clara Valley, California

Santa Clara Valley is bounded on the southwest and northeast by active strike-slip and reverse-oblique faults of the San Andreas fault system. On both sides of the valley, these faults are superposed on older normal and/or right-lateral normal oblique faults. The older faults comprised early components of the San Andreas fault system as it formed...

Graymer, Russell W.; Stanley, Richard G.; Ponce, David A.; Jachens, Robert C.; Simpson, Robert W.; Wentworth, Carl M.

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Year Published: 2015

Truncorotalia crassaformis from its type locality: Comparison with Caribbean plankton and Pliocene relatives

Truncorotalia crassaformis has been identified in Pliocene-Holocene assemblages globally but there has been little analysis of specimens from its type locality at Lomita Quarry, California. This has led to confusion about some diagnostic criteria, particularly the presence of a peripheral keel. To better understand variation specimens are...

Scott, George H.; Ingle, James C.; McCane, Brendan; Powell, Charles L.; Thunell, Robert C.
Scott, George H., Ingle Jr., James C., McCane, Brendan, Powell II, Charles L., Thunell, Robert C., Truncorotalia crassaformis from its type locality: Comparison with caribbean plankton and pliocene relatives, Marine Micropaleontology (2015), doi:10.1016/j.marmicro.2015.02.001

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Year Published: 2015

Mantle peridotite in newly discovered far-inland subduction complex, southwest Arizona: Initial report

The latest Cretaceous to early Palaeogene Orocopia Schist and related units are generally considered a low-angle subduction complex that underlies much of southern California and Arizona. A recently discovered exposure of Orocopia Schist at Cemetery Ridge west of Phoenix, Arizona, lies exceptionally far inland from the continental margin....

Haxel, Gordon B.; Jacobson, Carl E.; Wittke, James H.
Haxel, G. B., Jacobson, C. E., & Wittke, J. H. (2014, June 24). Mantle peridotite in newly discovered far-inland subduction complex, southwest Arizona: initial report. International Geology Review. Informa UK Limited. https://doi.org/10.1080/00206814.2014.928916

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Year Published: 2015

Relationships between protein-encoding gene abundance and corresponding process are commonly assumed yet rarely observed

For any enzyme-catalyzed reaction to occur, the corresponding protein-encoding genes and transcripts are necessary prerequisites. Thus, a positive relationship between the abundance of gene or transcripts and corresponding process rates is often assumed. To test this assumption, we conducted a meta-analysis of the relationships between gene and/or...

Rocca, Jennifer D.; Hall, Edward K.; Lennon, Jay T.; Evans, Sarah E.; Waldrop, Mark P.; Cotner, James B.; Nemergut, Diana R.; Graham, Emily B.; Wallenstein, Matthew D.