Publications
National Laboratories Program publications.
Filter Total Items: 1080
Breaching of strike-slip faults and successive flooding of pull-apart basins to form the Gulf of California seaway from ca. 8–6 Ma Breaching of strike-slip faults and successive flooding of pull-apart basins to form the Gulf of California seaway from ca. 8–6 Ma
The geologic record of the formation of marine basins during continental rifting is uncommonly preserved. Using GIS-based paleotectonic maps, we show that marine basin formation in the Gulf of California–Salton trough oblique rift (Mexico and the United States) occurred in a stepwise manner as crustal thinning lowered elevations within the Gulf of California Shear Zone, and subsidence...
Authors
Paul Umhoefer, Michael Darin, Scott Bennett, Lisa Skinner, Rebecca Dorsey, Michael Oskin
Geochemical characterization and modeling of regional groundwater contributing to the Verde River, Arizona between Mormon Pocket and the USGS Clarkdale gage Geochemical characterization and modeling of regional groundwater contributing to the Verde River, Arizona between Mormon Pocket and the USGS Clarkdale gage
We use synoptic surveys of stream discharge, stable isotopes, and dissolved noble gases to identify the source of groundwater discharge to the Verde River in central Arizona. The Verde River more than doubles in discharge in Mormon Pocket over a 1.4 km distance that includes three discrete locations of visible spring input to the river and other diffuse groundwater inputs. A detailed...
Authors
Kimberly Beisner, W. Gardner, Andrew Hunt
Rapid 3-D analysis of rockfalls Rapid 3-D analysis of rockfalls
Recent fatal and damaging rockfalls in Yosemite National Park indicate the need for rapid response data collection methods to inform public safety and assist with management response. Here we show the use of multiple-platform remote sensing methods to rapidly capture pertinent data needed to inform management and the public following a several large rockfalls from El Capitan cliff in...
Authors
Greg Stock, A. Guerin, Nikita Avdievitch, Brian Collins, Michel Jaboyedoff
Against the current— The Mojave River from sink to source: The 2018 Desert Symposium field trip road log Against the current— The Mojave River from sink to source: The 2018 Desert Symposium field trip road log
The Mojave River evolved over the past few million years by “fill and spill” from upper basins near its source in the Transverse Ranges to lower basins. Each newly “spilled into” basin in the series? sustained a long-lived lake but gradually filled with Mojave River sediment, leading to spill to a yet lower elevation? basin. The Mojave River currently terminates at Silver Lake, near...
Authors
David M. Miller, R.E. Reynolds, Krishangi Groover, David Buesch, H. Brown, Geoffrey Cromwell, Jill Densmore, A.L. Garcia, D. Hughson, J.R. Knott, Jeffrey Lovich
World distribution of uranium deposits World distribution of uranium deposits
Deposit data derived from IAEA UDEPO (http://infcis.iaea.org/UDEPO/About.cshtml) database with assistance from P. Bruneton (France) and M. Mihalasky (U.S.A.). The map is an updated companion to "World Distribution of Uranium Deposits (UDEPO) with Uranium Deposit Classification, IAEA Tech-Doc-1629". Geology was derived from L.B. Chorlton, Generalized Geology of the World, Geological...
Authors
M. Fairclough, J. Irvine, L. Katona, W. Simmon, P. Bruneton, Mark Mihalasky, M. Cuney, M. Aranha, O. Pylypenko, K. Poliakovska
Assessing rockfall susceptibility in steep and overhanging slopes using three-dimensional analysis of failure mechanisms Assessing rockfall susceptibility in steep and overhanging slopes using three-dimensional analysis of failure mechanisms
Rockfalls strongly influence the evolution of steep rocky landscapes and represent a significant hazard in mountainous areas. Defining the most probable future rockfall source areas is of primary importance for both geomorphological investigations and hazard assessment. Thus, a need exists to understand which areas of a steep cliff are more likely to be affected by a rockfall. An...
Authors
Battista Matasci, Greg Stock, Michael Jaboyedoff, Dario Carrea, Brian Collins, Antoine Guerin, G. Matasci, L. Ravanel
Crustal structure and quaternary acceleration of deformation rates in central Washington revealed by stream profile inversion, potential field geophysics, and structural geology of the Yakima folds Crustal structure and quaternary acceleration of deformation rates in central Washington revealed by stream profile inversion, potential field geophysics, and structural geology of the Yakima folds
Post‐Miocene tectonic uplift along fault‐cored anticlines within central Washington produced the Yakima Fold Province, a region of active NNE‐SSW shortening in the Cascadian backarc. The relative timing and rate of deformation along individual structures is coarsely defined yet imperative for seismic hazard assessment. In this work, we use geomorphic and geophysical mapping, stream...
Authors
Lydia Staisch, Richard Blakely, Harvey Kelsey, Richard Styron, Brian Sherrod
Assessment of undiscovered oil and gas resources of the Susitna Basin, southern Alaska, 2017 Assessment of undiscovered oil and gas resources of the Susitna Basin, southern Alaska, 2017
The U.S. Geological Survey (USGS) recently completed an assessment of undiscovered, technically recoverable oil and gas resources in the Susitna Basin of southern Alaska. Using a geology-based methodology, the USGS estimates that mean undiscovered volumes of about 2 million barrels of oil and nearly 1.7 trillion cubic feet of gas may be found in this area.
Authors
Richard Stanley, Christopher Potter, Kristen Lewis, Paul Lillis, Anjana Shah, Peter Haeussler, Jeffrey Phillips, Zenon Valin, Christopher Schenk, Timothy R. Klett, Michael Brownfield, Ronald Drake, Thomas Finn, Seth Haines, Debra Higley, David Houseknecht, Phuong A. Le, Kristen Marra, Tracey Mercier, Heidi Leathers-Miller, Stanley Paxton, Ofori Pearson, Marilyn E. Tennyson, Cheryl Woodall, Margarita Zyrianova
A time-lapse gravity survey of the Coso geothermal field, China Lake Naval Air Weapons Station, California A time-lapse gravity survey of the Coso geothermal field, China Lake Naval Air Weapons Station, California
We have conducted a gravity survey of the Coso geothermal field to continue the time-lapse gravity study of the area initiated in 1991. In this report, we outline a method of processing the gravity data that minimizes the random errors and instrument bias introduced into the data by the Scintrex CG-5 relative gravimeters that were used. After processing, the standard deviation of the...
Authors
Geoffrey Phelps, Collin Cronkite-Ratcliff, Kelly Blake
New geologic mapping of the northwestern Willamette Valley, Oregon, and its American Viticultural Areas (AVAs)—A foundation for understanding their terroir New geologic mapping of the northwestern Willamette Valley, Oregon, and its American Viticultural Areas (AVAs)—A foundation for understanding their terroir
A geologic map of the greater Portland, Oregon, metropolitan area is planned that will document the region’s complex geology (currently in review: “Geologic map of the greater Portland metropolitan area and surrounding region, Oregon and Washington,” by Wells, R.E., Haugerud, R.A., Niem, A., Niem, W., Ma, L., Evarts, R., Madin, I., and others). The map, which is planned to be published...
Authors
Ray E. Wells, Ralph Haugerud, Alan Niem, Wendy Niem, Lina Ma, Ian Madin, Russell Evarts
Disentangling the effects of low pH and metal mixture toxicity on macroinvertebrate diversity Disentangling the effects of low pH and metal mixture toxicity on macroinvertebrate diversity
One of the primary goals of biological assessment of streams is to identify which of a suite of chemical stressors is limiting their ecological potential. Elevated metal concentrations in streams are often associated with low pH, yet the effects of these two potentially limiting factors of freshwater biodiversity are rarely considered to interact beyond the effects of pH on metal...
Authors
Riccardo Fornaroli, Alessio Ippolito, Mari Tolkkinen, Heikki Mykra, Timo Muotka, Laurie Balistrieri, Travis S. Schmidt
By
Geology, Energy, and Minerals Mission Area, Contaminant Biology, Energy Resources Program, Environmental Health Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Toxic Substances Hydrology, Colorado Water Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Computational fluid dynamics simulations of the Late Pleistocene Lake Bonneville flood Computational fluid dynamics simulations of the Late Pleistocene Lake Bonneville flood
At approximately 18.0 ka, pluvial Lake Bonneville reached its maximum level. At its northeastern extent it was impounded by alluvium of the Marsh Creek Fan, which breached at some point north of Red Rock Pass (Idaho), leading to one of the largest floods on Earth. About 5320 km3 of water was discharged into the Snake River drainage and ultimately into the Columbia River. We use a 0D...
Authors
Jose Abril-Hernandez, Raul Perianez, Jim E. O'Connor, Daniel Garcia-Castellanos