Publications
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Assessing field-scale biogeophysical signatures of bioremediation over a mature crude oil spill Assessing field-scale biogeophysical signatures of bioremediation over a mature crude oil spill
We conducted electrical geophysical measurements at the National Crude Oil Spill Fate and Natural Attenuation Research Site (Bemidji, MN). Borehole and surface self-potential measurements do not show evidence for the existence of a biogeobattery mechanism in response to the redox gradient resulting from biodegradation of oil. The relatively small self potentials recorded are instead...
Authors
Lee Slater, Dimitrios Ntarlagiannis, Estella Atekwana, Farag Mewafy, Andre Revil, Magnus Skold, Yuri Gorby, Frederick D. Day-Lewis, John W. Lane, Dale D. Werkema, Jared J. Trost, Geoffrey N. Delin, William N. Herkelrath
Inversion of multi-frequency electromagnetic induction data for 3D characterization of hydraulic conductivity Inversion of multi-frequency electromagnetic induction data for 3D characterization of hydraulic conductivity
Electromagnetic induction (EMI) instruments provide rapid, noninvasive, and spatially dense data for characterization of soil and groundwater properties. Data from multi-frequency EMI tools can be inverted to provide quantitative electrical conductivity estimates as a function of depth. In this study, multi-frequency EMI data collected across an abandoned uranium mill site near Naturita...
Authors
Troy R. Brosten, Frederick D. Day-Lewis, Gregory M. Schultz, Gary P. Curtis, John W. Lane
A computer program for flow-log analysis of single holes (FLASH) A computer program for flow-log analysis of single holes (FLASH)
A new computer program, FLASH (Flow-Log Analysis of Single Holes), is presented for the analysis of borehole vertical flow logs. The code is based on an analytical solution for steady-state multilayer radial flow to a borehole. The code includes options for (1) discrete fractures and (2) multilayer aquifers. Given vertical flow profiles collected under both ambient and stressed (pumping...
Authors
F. D. Day-Lewis, C. D. Johnson, Frederick L. Paillet, K. J. Halford
Summary of estimated water use in the United States in 2005 Summary of estimated water use in the United States in 2005
About 410,000 million gallons per day (Mgal/d) of water was withdrawn for use in the United States during 2005. About 80 percent of the total (328,000 Mgal/d) withdrawal was from surface water, and about 82 percent of the surface water withdrawn was freshwater. The remaining 20 percent (82,600 Mgal/d) was withdrawn from groundwater, of which about 96 percent was freshwater. If...
Authors
Nancy L. Barber
Combined use of frequency-domain electromagnetic and electrical resistivity surveys to delineate near-lake groundwater flow in the semi-arid Nebraska Sand Hills, USA Combined use of frequency-domain electromagnetic and electrical resistivity surveys to delineate near-lake groundwater flow in the semi-arid Nebraska Sand Hills, USA
A frequency-domain electromagnetic (FDEM) survey can be used to select locations for the more quantitative and labor-intensive electrical resistivity surveys. The FDEM survey rapidly characterized the groundwater-flow directions and configured the saline plumes caused by evaporation from several groundwater-dominated lakes in the Nebraska Sand Hills, USA. The FDEM instrument was mounted...
Authors
John B. Ong, John W. Lane, Vitaly A. Zlotnik, Todd Halihan, Eric A. White
Preliminary Aeromagnetic Map of Joshua Tree National Park and Vicinity, Southern California Preliminary Aeromagnetic Map of Joshua Tree National Park and Vicinity, Southern California
This aeromagnetic map of Joshua Tree National Park and vicinity is intended to promote further understanding of the geology and structure in the region by serving as a basis for geophysical interpretations and by supporting geological mapping, water-resource investigations, and various topical studies. Local spatial variations in the Earth's magnetic field (evident as anomalies on...
Authors
V.E. Langenheim, P. L. Hill
The upper crust on its side---Steeply tilted slabs in the basin and range The upper crust on its side---Steeply tilted slabs in the basin and range
No abstract available.
Authors
Keith A. Howard
Water-the Nation's Fundamental Climate Issue A White Paper on the U.S. Geological Survey Role and Capabilities Water-the Nation's Fundamental Climate Issue A White Paper on the U.S. Geological Survey Role and Capabilities
Of all the potential threats posed by climatic variability and change, those associated with water resources are arguably the most consequential for both society and the environment (Waggoner, 1990). Climatic effects on agriculture, aquatic ecosystems, energy, and industry are strongly influenced by climatic effects on water. Thus, understanding changes in the distribution, quantity and...
Authors
Harry F. Lins, Robert M. Hirsch, Julie Kiang
Aggregation methodology for the circum-arctic resource appraisal Aggregation methodology for the circum-arctic resource appraisal
This paper presents a methodology that intends to aggregate the results of a recent assessment of undiscovered conventional oil and gas resources of the Arctic by the U.S. Geological Survey. The assessment occurred in 48 geologically defined regions called assessment units. The methodology includes using assessor specified pair-wise correlations as the basis to construct a correlation...
Authors
John H. Schuenemeyer, Donald L. Gautier
Stratigraphy, age, and depositional setting of the Miocene Barstow Formation at Harvard Hill, central Mojave Desert, California Stratigraphy, age, and depositional setting of the Miocene Barstow Formation at Harvard Hill, central Mojave Desert, California
New detailed geologic mapping and geochronology of the Barstow Formation at Harvard Hill, 30 km east of Barstow, CA, help to constrain Miocene paleogeography and tectonics of the central Mojave Desert. A northern strand of the Quaternary ENE-striking, sinistral Manix fault divides the Barstow Formation at Harvard Hill into two distinct lithologic assemblages. Strata north of the fault...
Authors
Shannon R. Leslie, David M. Miller, Joseph L. Wooden, Jorge A. Vazquez
Reconnaissance geochronology of tuffs in the Miocene Barstow Formation: Implications for basin evolution and tectonics in the central Mojave Desert Reconnaissance geochronology of tuffs in the Miocene Barstow Formation: Implications for basin evolution and tectonics in the central Mojave Desert
Early to middle Miocene lacustrine strata of the Barstow Formation are well dated in just a few places, limiting our ability to infer basin evolution and regional tectonics. At the type section in the Mud Hills, previous studies have shown that the lacustrine interval of the Barstow Formation is between ~16.3 Ma and ~13.4 Ma. Elsewhere, lake beds of the Barstow Formation have yielded...
Authors
David M. Miller, Shannon R. Leslie, John W. Hillhouse, Joseph L. Wooden, Jorge A. Vazquez, R. E. Reynolds
By
Natural Hazards Mission Area, Geology, Energy, and Minerals Mission Area, Volcano Hazards Program, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Groundwater and Streamflow Information Program, Volcano Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Stratigraphy and Mesozoic–Cenozoic tectonic history of northern Sierra Los Ajos and adjacent areas, Sonora, Mexico Stratigraphy and Mesozoic–Cenozoic tectonic history of northern Sierra Los Ajos and adjacent areas, Sonora, Mexico
Geologic mapping in the northern Sierra Los Ajos reveals new stratigraphic and structural data relevant to deciphering the Mesozoic–Cenozoic tectonic evolution of the range. The northern Sierra Los Ajos is cored by Proterozoic, Cambrian, Devonian, Mississippian, and Pennsylvanian strata, equivalent respectively to the Pinal Schist, Bolsa Quartzite and Abrigo Limestone, Martin Formation...
Authors
William R. Page, Floyd Gray, Alexander Iriondo, Daniel P. Miggins, Robert B. Blodgett, Florian Maldonado, Robert J. Miller