Publications
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Aeromagnetic survey map of Sacramento Valley, California
Three aeromagnetic surveys were flown to improve understanding of the geology and structure in the Sacramento Valley. The resulting data serve as a basis for geophysical interpretations, and support geological mapping, water and mineral resource investigations, and other topical studies. Local spatial variations in the Earth's magnetic field (evident as anomalies on aeromagnetic maps) reflect the
Authors
Victoria E. Langenheim
The rise of fire: Fossil charcoal in late Devonian marine shales as an indicator of expanding terrestrial ecosystems, fire, and atmospheric change
Fossil charcoal provides direct evidence for fire events that, in turn, have implications for the evolution of both terrestrial ecosystems and the atmosphere. Most of the ancient charcoal record is known from terrestrial or nearshore environments and indicates the earliest occurrences of fire in the Late Silurian. However, despite the rise in available fuel through the Devonian as vascular land pl
Authors
Susan M. Rimmer, Sarah J. Hawkins, Andrew C. Scott, Walter L. Cressler
Differentiating induced and natural seismicity using space-time-magnitude statistics applied to the Coso Geothermal field
A remarkable characteristic of earthquakes is their clustering in time and space, displaying their self-similarity. It remains to be tested if natural and induced earthquakes share the same behavior. We study natural and induced earthquakes comparatively in the same tectonic setting at the Coso Geothermal Field. Covering the preproduction and coproduction periods from 1981 to 2013, we analyze inte
Authors
Martin Schoenball, Nicholas C. Davatzes, Jonathan M. G. Glen
Two Holocene paleofire records from Peten, Guatemala: Implications for natural fire regime and prehispanic Maya land use
Although fire was arguably the primary tool used by the Maya to alter the landscape and extract resources, little attention has been paid to biomass burning in paleoenvironmental reconstructions from the Maya lowlands. Here we report two new well-dated, high-resolution records of biomass burning based on analysis of macroscopic fossil charcoal recovered from lacustrine sediment cores. The records
Authors
Lysanna Anderson, David B. Wahl
Geology of Joshua Tree National Park geodatabase
The database in this Open-File Report describes the geology of Joshua Tree National Park and was completed in support of the National Cooperative Geologic Mapping Program of the U.S. Geological Survey (USGS) and in cooperation with the National Park Service (NPS). The geologic observations and interpretations represented in the database are relevant to both the ongoing scientific interests of the
Authors
Robert E. Powell, Jonathan C. Matti, Pamela M. Cossette
USGS compilation of geographic information system (GIS) data of coal mines and coal-bearing areas in Mongolia
Geographic information system (GIS) information may facilitate energy studies, which in turn provide input for energy policy decisions. The U.S. Geological Survey (USGS) has compiled GIS data representing coal mines, deposits (including those with and without coal mines), occurrences, areas, basins, and provinces of Mongolia as of 2009. These data are now available for download, and may be used in
Authors
Michael H. Trippi, Harvey E. Belkin
Assessment of undiscovered oil and gas resources in the Uteland Butte Member of the Eocene Green River Formation, Uinta Basin, Utah
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered resources of 214 million barrels of oil, 329 billion cubic feet of associated/dissolved natural gas, and 14 million barrels of natural gas liquids in the informal Uteland Butte member of the Green River Formation, Uinta Basin, Utah.
Authors
Ronald C. Johnson, Justin E. Birdwell, Tracey J. Mercier, Michael E. Brownfield, Ronald R. Charpentier, Timothy R. Klett, Heidi M. Leathers, Christopher J. Schenk, Marilyn E. Tennyson
Assessment of undiscovered oil and gas resources in the Cherokee Platform Province area of Kansas, Oklahoma, and Missouri, 2015
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean volumes of undiscovered, technically recoverable resources of 463 million barrels of oil, 11.2 trillion cubic feet of gas, and 35 million barrels of natural gas liquids in the Cherokee Platform Province area of Kansas, Oklahoma, and Missouri.
Authors
Ronald M. Drake, Joseph R. Hatch, Christopher J. Schenk, Ronald R. Charpentier, Timothy R. Klett, Phuong A. Le, Heidi M. Leathers, Michael E. Brownfield, Stephanie B. Gaswirth, Kristen R. Marra, Janet K. Pitman, Christopher J. Potter, Marilyn E. Tennyson
Crustal-scale tilting of the central Salton block, southern California
The southern San Andreas fault system (California, USA) provides an excellent natural laboratory for studying the controls on vertical crustal motions related to strike-slip deformation. Here we present geologic, geomorphic, and gravity data that provide evidence for active northeastward tilting of the Santa Rosa Mountains and southern Coachella Valley about a horizontal axis oriented parallel to
Authors
Rebecca Dorsey, Victoria E. Langenheim
Geologic framework for the national assessment of carbon dioxide storage resources─South Florida Basin: Chapter L in Geologic framework for the national assessment of carbon dioxide storage resources
This report presents five storage assessment units (SAUs) that have been identified as potentially suitable for geologic carbon dioxide sequestration within a 35,075-square-mile area that includes the entire onshore and State-water portions of the South Florida Basin. Platform-wide, thick successions of laterally extensive carbonates and evaporites deposited in highly cyclic depositional environme
Authors
Tina L. Roberts-Ashby, Sean T. Brennan, Matthew D. Merrill, Madalyn S. Blondes, P.A. Freeman, Steven M. Cahan, Christina A. DeVera, Celeste D. Lohr
Plugs or flood-makers? the unstable landslide dams of eastern Oregon
Landslides into valley bottoms can affect longitudinal profiles of rivers, thereby influencing landscape evolution through base-level changes. Large landslides can hinder river incision by temporarily damming rivers, but catastrophic failure of landslide dams may generate large floods that could promote incision. Dam stability therefore strongly modulates the effects of landslide dams and might be
Authors
Elizabeth B. Safran, Jim E. O'Connor, Lisa L. Ely, Kyle House, Gordon E. Grant, Kelsey Harrity, Kelsey Croall, Emily Jones
By
Energy and Minerals Mission Area, Natural Hazards Mission Area, Energy Resources Program, Groundwater and Streamflow Information Program, Landslide Hazards Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Volcano Hazards Program, Volcano Science Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Assessment of undiscovered oil and gas resources in sandstone reservoirs of the Cotton Valley Group, U.S. Gulf Coast, 2015
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered mean volumes of 14 million barrels of conventional oil, 430 billion cubic feet of conventional gas, 34,028 billion cubic feet of continuous gas, and a mean total of 391 million barrels of natural gas liquids in sandstone reservoirs of the Upper Jurassic–Lower Cretaceous Cotton Valley Group in onshore la
Authors
Jennifer D. Eoff, Laura R.H. Biewick, Michael E. Brownfield, Lauri Burke, Ronald R. Charpentier, Russell F. Dubiel, Stephanie B. Gaswirth, Nicholas J. Gianoutsos, Scott A. Kinney, Timothy R. Klett, Heidi M. Leathers, Tracey J. Mercier, Stanley T. Paxton, Ofori N. Pearson, Janet K. Pitman, Christopher J. Schenk, Marilyn E. Tennyson, Katherine J. Whidden