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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.

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Year Published: 2014

Time-domain electromagnetic surveys at Fort Irwin, San Bernardino County, California, 2010–12

Between 2010 and 2012, a total of 79 time-domain electromagnetic (TEM) soundings were collected in 12 groundwater basins in the U.S. Army Fort Irwin National Training Center (NTC) study area to help improve the understanding of the hydrogeology of the NTC. The TEM data are discussed in this chapter in the context of geologic observations of the...

Buesch, David C.; Burgess, Matthew K.; Bedrosian, Paul A.
Burgess, M.K., and Bedrosian, P.A., 2014, Time-domain electromagnetic surveys at Fort Irwin, San Bernardino County, California, 2010–12, chap. F of Buesch, D.C., ed., Geology and geophysics applied to groundwater hydrology at Fort Irwin, California: U.S. Geological Survey Open-File Report 2013–1024, 64 p., https://doi.org/10.3133/ofr20131024F.

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Year Published: 2014

Airborne electromagnetic data and processing within Leach Lake Basin, Fort Irwin, California

From December 2010 to January 2011, the U.S. Geological Survey conducted airborne electromagnetic and magnetic surveys of Leach Lake Basin within the National Training Center, Fort Irwin, California. These data were collected to characterize the subsurface and provide information needed to understand and manage groundwater resources within Fort...

Buesch, David C.; Bedrosian, Paul A.; Ball, Lyndsay B.; Bloss, Benjamin R.
Bedrosian, P.A., Ball, L.B., and Bloss, B.R., 2014, Airborne electromagnetic data and processing within Leach Lake Basin, Fort Irwin, California, chap. G of Buesch, D.C., ed., Geology and geophysics applied to groundwater hydrology at Fort Irwin, California: U.S. Geological Survey Open File Report 2013–1024, 20 p., https://doi.org/10.3133/ofr20131024G.

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Year Published: 2014

40Ar/39Ar geochronology, paleomagnetism, and evolution of the Boring volcanic field, Oregon and Washington, USA

The 40Ar/39Ar investigations of a large suite of fine-grained basaltic rocks of the Boring volcanic field (BVF), Oregon and Washington (USA), yielded two primary results. (1) Using age control from paleomagnetic polarity, stratigraphy, and available plateau ages, 40Ar/39Ar recoil model ages are defined that provide reliable age results...

Fleck, Robert J.; Hagstrum, Jonathan T.; Calvert, Andrew T.; Evarts, Russell C.; Conrey, Richard M.
Fleck, R.J., Hagstrum, J.T., Calvert, A.T., Evarts, R.C., and Conrey, R.M., 2014, 40Ar/39Ar geochronology, paleomagnetism, and evolution of the Boring volcanic field, Oregon and Washington, USA: Geosphere, v. 10, p. 1283–1314.

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Year Published: 2014

Geomorphic evidence for enhanced Pliocene-Quaternary faulting in the northwestern Basin and Range

Mountains in the U.S. Basin and Range Province are similar in form, yet they have different histories of deformation and uplift. Unfortunately, chronicling fault slip with techniques like thermochronology and geodetics can still leave sizable, yet potentially important gaps at Pliocene–Quaternary (∼105–106 yr) time scales. Here, we...

Ellis, Magdalena A; Barnes Jason B; Colgan, Joseph P.
Ellis, M.A., Barnes, J.B., and Colgan, J.P., 2015, Geomorphic evidence for enhanced Plio-Quaternary faulting in the northwestern Basin and Range: Lithosphere, v. 7(1), p. 59–72, doi:10.1130/L401.1.

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Year Published: 2014

Geophysical framework of the Peninsular Ranges batholith—Implications for tectonic evolution and neotectonics

The crustal structure of the Peninsular Ranges batholith can be divided geophysically into two parts: (1) a western mafic part that is dense, magnetic, and characterized by relatively high seismic velocities (>6.25 km/s), low heat flow (<60 mW/m2), and relatively sparse seismicity, and (2) an eastern, more felsic part that is less dense,...

Langenheim, Victoria; Jachens, Robert C.; Aiken, Carlos
Langenheim, V.E., Jachens, R.C., and Aiken, C., 2014, Geophysical framework of the Peninsular Ranges batholith—Implications for tectonic evolution and neotectonics, in Morton, D.M., and Miller, F.K., eds., Peninsular Ranges Batholith, Baja California and Southern California: Geological Society of America Memoir 211, p. 1–20, doi:10.1130/2014.1211(01).