Geology, Minerals, Energy, and Geophysics Science Center

Publications

Filter Total Items: 2,228
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Year Published: 2020

Focus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, tin, titanium, and tungsten

In response to a need for information on potential domestic sources of critical minerals, the Earth Mapping Resources Initiative (Earth MRI) was established to identify and prioritize areas for acquisition of new geologic mapping, geophysical data, and elevation data to improve our knowledge of the geologic framework of the United States. Phase 1...

Hammarstrom, Jane M.; Dicken, Connie L.; Day, Warren C.; Hofstra, Albert H.; Drenth, Benjamin J.; Shah, Anjana K.; McCafferty, Anne E.; Woodruff, Laurel G.; Foley, Nora K.; Ponce, David A.; Frost, Thomas P.; Stillings, Lisa L.
Hammarstrom, J.M., Dicken, C.L., Day, W.C., Hofstra, A.H., Drenth, B.J., Shah, A.K., McCafferty, A.E., Woodruff, L.G., Foley, N.K., Ponce, D.A., Frost, T.P., and Stillings, L.L., 2020, Focus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, tin, titanium, and tungsten, chap. B of U.S. Geological Survey, Focus areas for data acquisition for potential domestic sources of critical minerals: U.S. Geological Survey Open-File Report 2019–1023, 67 p., https://doi.org/10.3133/ofr20191023B.

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Year Published: 2020

Opportunities and challenges for restoration of the Merced River through Yosemite Valley, Yosemite National Park, USA

Successful river restoration requires understanding and integration of multiple disciplinary perspectives, including evaluations of past and ongoing watershed processes, local geomorphic response, and impacts unique to human activity. Nowhere is this more apparent than along the Merced River in Yosemite National Park, USA, where both an...

Booth, Derek; Ross-Smith, Katie; Haddon, Elizabeth; Dunne, Thomas; Larsen, Eric W.; Roche, James W.; Stock, Greg M.; Mahacek, Virginia

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Year Published: 2020

Sea surface temperature across the Subarctic North Pacific and marginal seas through the past 20,000 years: A paleoceanographic synthesis

Deglacial sea surface conditions in the subarctic North Pacific and marginal seas are the subject of increasing interest in paleoceanography. However, a cohesive picture of near-surface oceanography from which to compare inter and intra-regional variability through the last deglaciation is lacking. We present a synthesis of sea surface temperature...

Davis, Catherine V.; Myhre, Sarah; Deutsch, Curtis; Caissie, Beth; Praetorius, Summer K.; Borreggine, Marisa; Thunell, Robert C.

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Year Published: 2020

Holocene paleoclimate change in the western US: The importance of chronology in discerning patterns and drivers

Sediment in lakes and meadows forms a powerful archive that can be used to reconstruct environmental change through time. Reconstructions of lake level, of chemical, biological, and hydrological conditions, and of surrounding vegetation provide detailed information about past climate conditions, both locally and regionally. Indeed, most of our...

Zimmerman, Susan; Wahl, David

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Year Published: 2020

Geomorphic map of western Whatcom County, Washington

Western Whatcom County has a rich history of glaciation, sea-level change, fluvial erosion and deposition, landsliding, nearby volcanic activity, and human landscape modification. This lidar-derived geomorphic map interprets this history from the form and position of the Earth’s surface.The geomorphic record is broken into nine phases, beginning...

Kovanen, Dori J.; Haugerud, Ralph A.; Easterbrook, Don J.
Kovanen, D.J., Haugerud, R.A., and Easterbrook, D.J., 2020, Geomorphic map of western Whatcom County, Washington: U.S. Geological Survey Scientific Investigations Map 3406, pamphlet 42 p., scale 1:50,000, https://doi.org/10.3133/sim3406.

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Year Published: 2020

Generalized models to estimate carbon and nitrogen stocks of organic soil horizons in Interior Alaska

Boreal ecosystems comprise one tenth of the world’s land surface and contain over 20 % of the global soil carbon (C) stocks. Boreal soils are unique in that its mineral soil is covered by what can be quite thick layers of organic soil. These organic soil layers, or horizons, can differ in their state of decomposition, source vegetation, and...

Manies, Kristen L.; Waldrop, Mark; Harden, Jennifer W.

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Year Published: 2020

6&6: A transdisciplinary approach to art-science collaboration

Despite an historical connection between the arts and sciences, in the past century, the two disciplines have been greatly siloed. However, there is a renewed interest in collaboration across the arts and sciences to support conservation practice by understanding and communicating complex environmental, social, and cultural challenges in novel...

Clark, Sara; Magrane, Eric; Baumgartner, Thomas; Bennett, Scott E. K.; Bogan, Micahel; Edwards, Taylor; Dimmitt, Mark A.; Green, Heather; Hedgcock, Charles; Johnson, Bemjamin M.; Johnson, Maria R.; Velo, Kathleen; Wilder, Benjamin T.

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Year Published: 2020

Life at the frozen limit: Microbial carbon metabolism across a Late Pleistocene permafrost chronosequence

Permafrost is an extreme habitat yet it hosts microbial populations that remain active over millennia. Using permafrost collected from a Pleistocene chronosequence (19 to 33 ka), we hypothesized that the functional genetic potential of microbial communities in permafrost would reflect microbial strategies to metabolize permafrost soluble organic...

Leewis, Mary-Cathrine; Berlemont, Renaud; Podgorski, David C.; Srinivas, Archana; Zito, Phoebe; Spencer, Robert G. M.; McFarland, Jack; Douglas, Thomas A.; Conaway, Christopher H.; Waldrop, Mark; Mackelprang, Rachel

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Year Published: 2020

Cryptic evolved melts beneath monotonous basaltic shield volcanoes in the Galápagos Archipelago

Many volcanoes erupt compositionally homogeneous magmas over timescales ranging from decades to millennia. This monotonous activity is thought to reflect a high degree of chemical homogeneity in their magmatic systems, leading to predictable eruptive behaviour. We combine petrological analyses of erupted crystals with new thermodynamic models to...

Stock, M.J.; Geist, D.; Neave, DA; Gleason, M.L.M .; Bernard, B.; Howard, Keith A.; Buisman, I.; Maclennan, J.

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Year Published: 2020

Mapping the 3-D extent of the Stillwater Complex, Montana—Implications for potential platinum group element exploration and development

Geophysical models characterize the exposed and interpreted buried extent of the Stillwater Complex, critical for understanding the origin of the layered mafic intrusion and its associated high-grade platinum group element resources. The 3D models, constrained by gravity, magnetic, xenolith, seismic, borehole, and rock property data indicate that...

Finn, Carol A.; Zientek, Michael L.; Parks, Heather L.; Peterson, Dana Elise

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Year Published: 2020

A new data set of granitic rock strength values from Yosemite Valley, California: Applications to rock fall assessment

To explore connections between rock strength and rock falls, we undertook a comprehensive rock mechanics testing program for six granitic rock types in Yosemite Valley (California, USA) where rock falls are a common geomorphic and sometimes hazardous process. We collected samples from boulders located at the base of cliffs, with the inherent...

Collins, Brian D.; Sandrone, Federica; Gastaldo, Laurent; Stock, Greg M.; Jaboyedoff, Michel
Collins, B.D., Sandrone, F., Gastaldo, L., Stock, G.M., Jaboyedoff, M., 2020, A new data set of granitic rock strength values from Yosemite Valley, California: applications to rock fall assessment, Proceedings of the 54th US Rock Mechanics/Geomechanics Symposium, Golden, Colorado, paper no. 20-1412, 7p.

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Year Published: 2020

The Cenozoic evolution of crustal shortening and left‐lateral shear in the central East Kunlun Shan: Implications for the uplift history of the Tibetan Plateau

The timing of crustal shortening and strike‐slip faulting along the East Kunlun Shan provides insight into the history of surface uplift and may constrain the time at which the Tibetan Plateau reached high elevations. We investigate a series of extensional basins and restraining bends along the Xidatan strand of the Kunlun strike‐slip fault, which...

Staisch, Lydia M.; Niemi, Nathan A; Clark, Marin K.; Chang, Hong