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Year Published: 2016

Three-dimensional electrical resistivity model of the hydrothermal system in Long Valley Caldera, California, from magnetotellurics

Though shallow flow of hydrothermal fluids in Long Valley Caldera, California, has been well studied, neither the hydrothermal source reservoir nor heat source has been well characterized. Here a grid of magnetotelluric data were collected around the Long Valley volcanic system and modeled in 3-D. The preferred electrical resistivity model...

Peacock, Jared R.; Mangan, Margaret T.; McPhee, Darcy K.; Wannamaker, Phil E.
J.R. Peacock, M.T. Mangan, D. McPhee, and P.E. Wannamaker, 2016, Three-dimensional electrical resistivity model of the hydrothermal system in Long Valley Caldera, California, from magnetotellurics: Geophysical Research Letters,

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Year Published: 2016

Geochemistry of the Black Sea during the last 15 kyr: A protracted evolution of its hydrography and ecology

The Black Sea is a 2200 m deep anoxic, marine sea connected to the Mediterranean Sea via the Dardanelles Strait, Marmara Sea, and the 3 km wide, 35 m deep Bosphorus Strait. The biogeochemistry of sediment from the Anatolia slope has recorded changes to the hydrography leading up to and following the input of Mediterranean water at ~9.4 ka (103 ...

Piper, David Z.
Piper, D.Z., 2016, Geochemistry of the Black Sea during the last 15 kyr; a protracted evolution of its hydrography and ecology: Paleoceanography.

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Year Published: 2016

Late Neogene deformation of the Chocolate Mountains Anticlinorium: Implications for deposition of the Bouse Formation and early evolution of the Lower Colorado River

Deformation related to late Neogene dextral shear can explain a shift from an estuarine to lacustrine depositional environment in the southern Bouse Formation north of Yuma, Arizona. We infer that late Neogene deformation in the Chocolate Mountain Anticlinorium (CMA) created a barrier that blocked an estuary inlet, and that pre-existing and...

Beard, Sue; Haxel, Gordon B.; Dorsey, Rebecca J.; McDougall, Kristin A.; Jacobsen, Carl E.

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Year Published: 2016

The Provo shoreline of Lake Bonneville: Chapter 7

G.K. Gilbert studied the Bonneville basin 150 years ago and his findings have largely stood the test of time: The Provo shoreline, the most prominent geomorphic feature of Lake Bonneville, reflects threshold-stabilized overflow of the lake after the Bonneville flood and before a drier climate caused the lake to shrink. Subsequent refinements in...

Miller, David M.
D.M. Miller, The Provo Shoreline of Lake Bonneville, Developments in Earth Surface Processes, Volume 20, 2016, Pages 127-144, ISSN 0928-2025, http://dx.doi.org/10.1016/B978-0-444-63590-7.00007-X.

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Year Published: 2016

Aeromagnetic map of northwest Utah and adjacent parts of Nevada and Idaho

Two aeromagnetic surveys were flown to promote further understanding of the geology and structure in northwest Utah and adjacent parts of Nevada and Idaho by serving as a basis for geophysical interpretations and by supporting geological mapping, water and mineral resource investigations, and other topical studies. Although this area is in general...

Langenheim, Victoria

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Year Published: 2016

GIS methodology for geothermal play fairway analysis: Example from the Snake River Plain volcanic province

Play fairway analysis in geothermal exploration derives from a systematic methodology originally developed within the petroleum industry and is based on a geologic and hydrologic framework of identified geothermal systems. We are tailoring this methodology to study the geothermal resource potential of the Snake River Plain and surrounding region....

DeAngelo, Jacob; Shervais, John W.; Glen, Jonathan M.; Nielson, Dennis L.; Garg, Sabodh; Dobson, Patrick; Gasperikova, Erika; Sonnenthal, Eric; Visser, Charles; Liberty, Lee M.; Siler, Drew; Evans, James P.; Santellanes, Sean

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Year Published: 2016

The Pilot Valley shoreline: An early record of Lake Bonneville dynamics: Chapter 3

The Pilot Valley shoreline is named for distinctive gravel beaches on the eastern, northern, and western sides of Pilot Valley playa, Utah. The shoreline has been identified across the Bonneville basin where it is characterized by one to three beach crests between ~ 1305 and 1309 m elevation, all overlain by deep-water marl of Lake...

Miller, David M.; Phelps, Geoffrey

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Year Published: 2016

Accretionary lapilli: what’s holding them together?

Accretionary lapilli from Tagus cone, Isla Isabela, Galápagos were analyzed using scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS) techniques. Our main findings are (1) the lapilli formed and hardened in a few minutes while still aloft in the dispersing eruption column. (2) Palagonite rinds developed first...

Adams, Paul M.; Lynch, David K.; Buesch, David C.
Adams, P.M., Lynch, D.K., and Buesch, D.C., 2016, Accretionary lapilli: what’s holding them together? in Reynolds, R.E., ed, “Going LOCO: Investigations along the Lower Colorado River”, California State University Desert Studies Consortium, p. 256-265.

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Year Published: 2016

Architecture, geochemistry, and paleomagnetic directions of the 5.42 Ma Broadwell Mesa basalt volcanic field, Bristol Mountains, California

No abstract available.

Buesch, David C.; Phelps, Geoffrey
Buesch, D.C., and Phelps, G.A., 2016, Architecture, geochemistry, and paleomagnetic directions of the 5.42 Ma Broadwell Mesa basalt volcanic field, Bristol Mountains, California: in Reynolds, R.E., ed, “Going LOCO: Investigations along the Lower Colorado River”, California State University Desert Studies Consortium, p. 253-255.

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Year Published: 2016

Contemporary deformation in the Yakima fold and thrust belt estimated with GPS

Geodetic, geologic and palaeomagnetic data reveal that Oregon (western USA) rotates clockwise at 0.3 to 1.0° Ma−1 (relative to North America) about an axis near the Idaho–Oregon–Washington border, while northeast Washington is relatively fixed. This rotation has been going on for at least 15 Ma. The Yakima fold and thrust belt (YFTB) forms the...

McCaffrey, Robert; King, Robert W.; Wells, Ray; Lancaster, Matthew; Miller, M. Meghan

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Year Published: 2016

Chemical abrasion-SIMS (CA-SIMS) U-Pb dating of zircon from the late Eocene Caetano caldera, Nevada

Zircon geochronology is a critical tool for establishing geologic ages and time scales of processes in the Earth's crust. However, for zircons compromised by open system behavior, achieving robust dates can be difficult. Chemical abrasion (CA) is a routine step prior to thermal ionization mass spectrometry (TIMS) dating of zircon to remove...

Watts, Kathryn E.; Coble, Matthew A.; Vazquez, Jorge A.; Henry, Christopher D.; Colgan, Joseph P.; John, David A.

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Year Published: 2016

Geology and geologic history of the Moscow-Pullman basin, Idaho and Washington, from late Grande Ronde to late Saddle Mountains time

The Moscow-Pullman basin, located on the eastern margin of the Columbia River flood basalt province, consists of a subsurface mosaic of interlayered Miocene sediments and lava flows of the Imnaha, Grande Ronde, Wanapum, and Saddle Mountains Basalts of the Columbia River Basalt Group. This sequence is ~1800 ft (550 m) thick in the east around...

Bush, John H; Garwood, Dean L; Dunlap, Pamela
Bush, J.H., Garwood, D.L., and Dunlap, Pamela, 2016, Geology and geologic history of the Moscow-Pullman basin, Idaho and Washington, from late Grande Ronde to late Saddle Mountains time, in Lewis, R.S., and Schmidt, K.L., eds., xxxx: Geological Society of America Field Guide 41, p. xxx–xxx, doi: 10.1130/2016.0041(05).