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Year Published: 2017

Spatiotemporal analysis of changes in lode mining claims around the McDermitt Caldera, northern Nevada and southern Oregon

Resource managers and agencies involved with planning for future federal land needs are required to complete an assessment of and forecast for future land use every ten years. Predicting mining activities on federal lands is difficult as current regulations do not require disclosure of exploration results. In these cases, historic mining claims...

Coyan, Joshua; Zientek, Michael L.; Mihalasky, Mark J.
Coyan, J.A., Zientek, M.L. & Mihalasky, M.J. Nat Resour Res (2017) 26: 319. doi:10.1007/s11053-017-9324-9

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Year Published: 2017

The interacting roles of climate, soils, and plant production on soil microbial communities at a continental scale

Soil microbial communities control critical ecosystem processes such as decomposition, nutrient cycling, and soil organic matter formation. Continental scale patterns in the composition and functioning of microbial communities are related to climatic, biotic, and edaphic factors such as temperature and precipitation, plant community composition,...

Waldrop, Mark P.; Holloway, JoAnn M.; Smith, David B.; Goldhaber, Martin B.; Drenovsky, R.E.; Scow, K.M.; Dick, R.; Howard, Daniel M.; Wylie, Bruce K.; Grace, James B.
Waldrop, M.P., Holloway, J.M., Smith, D.B., Goldhaber, M.B., Drenovsky, R.E., Scow, K.M., Dick, R., Howard, D., Wylie, B., and Grace, J.B., 2017, The interacting roles of climate, soils, and plant production on soil microbial communities at a continental scale: Ecology, v. 98, no. 7, p. 1957-1967, https://doi.org/10.1002/ecy.1883.

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Year Published: 2017

Active tectonics of the northern Mojave Desert: The 2017 Desert Symposium field trip road log

The 2017 Desert Symposium field trip will highlight recent work by the U.S. Geological Survey geologists and geophysicists, who have been mapping young sediment and geomorphology associated with active tectonic features in the least well-known part of the eastern California Shear Zone (ECSZ). This area, stretching from Barstow eastward in a giant...

Miller, David M.; Reynolds, R.E.; Phelps, Geoffrey; Honke, Jeffrey S.; Cyr, Andrew J.; Buesch, David C.; Schmidt, Kevin M.; Losson, G.

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Year Published: 2017

The Neogene genus Streptochilus (Brönnimann and Resig, 1971) from the Gulf of California

Four species of the planktonic foraminiferal genus Streptochilus from key Neogene marine localities are documented in relation to the evolution of the Gulf of California: S. globigerus, S. latus, S. macdougallae sp. nov., and S. inglei sp. nov. Planktonic foraminiferal bioevents and strontium isotopes in the Bouse, Tirabuzón, Carmen and Ojo de...

Miranda Martínez, A.Y.; Carreño, A.L.; McDougall, Kristin
Miranda-Martínez, A. Y., Carreño, A. L., & McDougall, K. (2017, April). The Neogene genus Streptochilus (Brönnimann and Resig, 1971) from the Gulf of California. Marine Micropaleontology. Elsevier BV. https://doi.org/10.1016/j.marmicro.2017.05.001

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Year Published: 2017

Geologic map of the Beacon Rock quadrangle, Skamania County, Washington

The Beacon Rock 7.5′ quadrangle is located approximately 50 km east of Portland, Oregon, on the north side of the Columbia River Gorge, a scenic canyon carved through the axis of the Cascade Range by the Columbia River. Although approximately 75,000 people live within the gorge, much of the region remains little developed and is encompassed by the...

Evarts, Russell C.; Fleck, Robert J.
Evarts, R.C., and Fleck, R.J., 2017, Geologic map of the Beacon Rock quadrangle, Skamania County, Washington: U.S. Geological Survey Scientific Investigations Map 3367, pamphlet 61 p., scale 1:24,000, https://doi.org/10.3133/sim3367.

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Year Published: 2017

Regional and temporal variability of melts during a Cordilleran magma pulse: Age and chemical evolution of the jurassic arc, eastern mojave desert, California

Intrusive rock sequences in the central and eastern Mojave Desert segment of the Jurassic Cordilleran arc of the western United States record regional and temporal variations in magmas generated during the second prominent pulse of Mesozoic continental arc magmatism. U/Pb zircon ages provide temporal control for describing variations in rock and...

Barth, A.P.; Wooden, J.L.; Miller, David M.; Howard, Keith A.; Fox, Lydia; Schermer, Elizabeth R.; Jacobson, C.E.
Regional and temporal variability of melts during a Cordilleran magma pulse: Age and chemical evolution of the Jurassic arc, eastern Mojave Desert, California. Barth A.P., Wooden J.L., Miller D.M., Howard K.A., Fox L.K., Schermer E.R., Jacobson C.E. Geological Society of America Bulletin. 5 October 2016. v. 129 no. 3-4 p. 429-448

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Year Published: 2017

Assessing changes in the physico-chemical properties and fluoride adsorption capacity of activated alumina under varied conditions

Adsorption using activated alumina is a simple method for removing fluoride from drinking water, but to be cost effective the adsorption capacity must be high and effective long-term. The intent of this study was to assess changes in its adsorption capacity under varied conditions. This was determined by evaluating the physico-chemical properties...

Craig, Laura; Stillings, Lisa; Decker, David L.

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Year Published: 2017

Re-Os systematics and geochemistry of cobaltite (CoAsS) in the Idaho cobalt belt, Belt-Purcell Basin, USA: Evidence for middle Mesoproterozoic sediment-hosted Co-Cu sulfide mineralization with Grenvillian and Cretaceous remobilization

We report the first study of the Re-Os systematics of cobaltite (CoAsS) using disseminated grains and massive sulfides from samples of two breccia-type and two stratabound deposits in the Co-Cu-Au Idaho cobalt belt (ICB), Lemhi subbasin to the Belt-Purcell Basin, Idaho, USA. Using a 185Re + 190Os spike solution, magnetic and non-...

Saintilan, N.J.; Creaser, R.A.; Bookstrom, Arthur A.
Saintilan, N.J., Creaser, R.A., and Bookstrom, A.A., 2017, Re-Os systematics and geochemistry of cobaltite (CoAsS) in the Idaho cobalt belt, Belt-Purcell Basin, USA: Evidence for middle Mesoproterozoic sediment-hosted Co-Cu sulfide mineralization with Grenvillian and Cretaceous remobilization: Ore Geology Reviews, v. ?, p. ?

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Year Published: 2017

Cascadia subduction tremor muted by crustal faults

Deep, episodic slow slip on the Cascadia subduction megathrust of western North America is accompanied by low-frequency tremor in a zone of high fluid pressure between 30 and 40 km depth. Tremor density (tremor epicenters per square kilometer) varies along strike, and lower tremor density statistically correlates with upper plate faults that...

Wells, Ray; Blakely, Richard J.; Wech, Aaron G.; McCrory, Patricia A.; Michael, Andrew
Wells, RE, Blakely, RJ, Wech, AG, McCrory, Michael, A., 2017, Cascadia subduction tremor muted by crustal faults. Geology, 45(6) 515-518.

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Year Published: 2017

The Evergreen basin and the role of the Silver Creek fault in the San Andreas fault system, San Francisco Bay region, California

The Evergreen basin is a 40-km-long, 8-km-wide Cenozoic sedimentary basin that lies mostly concealed beneath the northeastern margin of the Santa Clara Valley near the south end of San Francisco Bay (California, USA). The basin is bounded on the northeast by the strike-slip Hayward fault and an approximately parallel subsurface fault that is...

Jachens, Robert C.; Wentworth, Carl M.; Graymer, Russell W.; Williams, Robert; Ponce, David A.; Mankinen, Edward A.; Stephenson, William J.; Langenheim, Victoria
R.C. Jachens, C.M. Wentworth, R.W. Graymer, R.A. Williams, D.A. Ponce, E.A. Mankinen, W.J. Stephenson, and V.E. Langenheim The Evergreen basin and the role of the Silver Creek fault in the San Andreas fault system, San Francisco Bay region, California Geosphere, April 2017, v. 13, p. 269-286

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Year Published: 2017

Reconnaissance sedimentology of selected tertiary exposures in the upland region bordering the Yukon Flats basin, east-central Alaska

This report summarizes reconnaissance sedimentologic and stratigraphic observations made during six days of helicopter-supported fieldwork in 2002 on Tertiary sedimentary rocks exposed in the upland region around the flanks of the Yukon Flats basin in east-central Alaska (fig. 1). This project was a cooperative effort between the Alaska Division...

LePain, David L.; Stanley, Richard G.
LePain, D.L., and Stanley, R.G., 2017, Reconnaissance sedimentology of selected Tertiary exposures in the upland region bordering the Yukon Flats basin, east-central Alaska: LePain, D.L., and Stanley, R.G., 2017, Reconnaissance sedimentology of selected Tertiary exposures in the upland region bordering the Yukon Flats basin, east-central Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2016-6, 14 p. http://doi.org/10.14509/29700 Preliminary Interpretive Report 2016-6, 14 p. http://doi.org/10.14509/29700

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Year Published: 2017

Geologic map of the Providence Mountains in parts of the Fountain Peak and adjacent 7.5' quadrangles, San Bernardino County, California

IntroductionThe Providence Mountains are in the eastern Mojave Desert about 60 km southeast of Baker, San Bernardino County, California. This range, which is noted for its prominent cliffs of Paleozoic limestone, is part of a northeast-trending belt of mountainous terrain more than 100 km long that also includes the Granite Mountains, Mid Hills,...

Stone, Paul; Miller, David M.; Stevens, Calvin H.; Rosario, Jose J.; Vazquez, Jorge A.; Wan, Elmira; Priest, Susan S.; Valin, Zenon C.
Stone, Paul, Miller, D.M., Stevens, C.H., Rosario, Jose, Vazquez, J.A., Wan, Elmira, Priest, S.S., and Valin, Z.C., 2017, Geologic map of the Providence Mountains in parts of the Fountain Peak and adjacent 7.5' quadrangles, San Bernardino County, California: U.S. Geological Survey Scientific Investigations Map 3376, pamphlet 52 p., scale 1:24,000, https://doi.org/10.3133/sim3376.