Geology, Minerals, Energy, and Geophysics Science Center

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Scientists with the GMEG Science Center work on issues related to geologic processes, mineral and energy resource potential, and past climate, primarily in the Western United States. The science staff includes Geologists, Geophysicists, Geochemists, Biologists, and Geographic Information Systems specialists located in Arizona, California, Nevada, Oregon, and Washington.

Primary Research Direction - What we do.

GMEGSC focuses on Geologic Mapping, Mineral Resources and Mineral Environmental Health, Landslide Hazards, Energy Resources, Earthquake Hazards, and Land Change Science.

Innovation - How we help.

GMEGSC hosts the USGS Innovation Center, which sponsors work with public and private technology partners to design, test, and bring into operation a new generation of technical and engineering tools to address urgent national natural science issues.

Disciplinary Expertise - How we do it.

GMEGSC utilizes Geologic Mapping and Tectonics, Geophysics, Economic Geology, Geochronology, Sedimentary Basin Studies and Energy Assessments, Landslide Hazards, Geomorphology, Paleoclimatology, and many more processes to complete our work!

News

Date published: May 22, 2018

Digital Gold Rush Depends on Traditional Gold

In 1849, the discovery of gold in California sparked one of the most famous gold rushes in history. Thousands trekked across mountainous terrain to seek the precious metal, with entire industries springing up around the rush. In fact, the desire to understand our mineral resource wealth that led to the creation of the U.S. Geological Survey was in part fueled by gold rushes like this one.

Publications

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Year Published: 2019

Post-12 Ma deformation of the lower Colorado River corridor, southwestern USA: Implications for diffuse transtension and the Bouse Formation

Structural evidence presented here documents that deformation was ongoing within the lower Colorado River corridor (southwestern USA) during and after the latest Miocene Epoch, postdating large-magnitude extension and metamorphic core complex formation. Geometric and kinematic data collected on faults in key geologic units constrain the timing of...

Thacker, Jacob; Karlstrom, Karl; Crossey, Laura; Crow, Ryan S.; Cassidy, Colleen; Beard, L. Sue; Singleton, John; Strickland, Evan; Seymour, Nikki; Wyatt, Michael

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Year Published: 2019

Depth to bedrock based on modeling of gravity data of the eastern part of Edwards Air Force Base, California

We describe a gravity survey acquired to determine the thickness of basin-fill deposits (depth to bedrock) and to delineate geologic structures that might influence groundwater flow beneath the eastern part of Edwards Air Force Base, California. Inversion of these gravity data combined with geologic map and well information provides an estimate of...

Langenheim, Victoria; Morita, Andrew; Christensen, Allen H.; Cromwell, Geoffrey; Ely, Christopher
Langenheim, V.E., Morita, A., Christensen, A.H., Cromwell, G., and Ely, C., 2019, Depth to bedrock based on modeling of gravity data of the eastern part of Edwards Air Force Base, California: U.S. Geological Survey Open-File Report 2019–1128, 12 p., https://doi.org/10.3133/ofr20191128.

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Year Published: 2019

Geologic map of the Blythe 7.5' quadrangle, La Paz County, Arizona and Riverside County, California

The geologic map of the Blythe 7.5' quadrangle spans about 60 percent of the width of the Holocene floodplain and valley floor of the lower Colorado River and the adjacent lower piedmont on the east side of the Colorado River Valley. This map depicts a composite geologic record of the river’s response to the transition from a natural flow regime...

Block, Debra; Gootee, Brian F.; House, P. Kyle; Pearthree, Philip A