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Filter Total Items: 944
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Year Published: 2015

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...

Trippi, Michael H.; Belkin, Harvey E.
Trippi, M.H., and Belkin, H.E., comps., 2015, USGS compilation of geographic information system (GIS) data representing coal mines and coal-bearing areas of Mongolia: U.S. Geological Survey Open-File Report 2015–1144, 18 p., http://dx.doi.org/10.3133/ofr20151144.

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Year Published: 2015

A conceptual framework and monitoring strategy for movement of saltwater in the coastal plain aquifer system of Virginia

A conceptual framework synthesizes previous studies to provide an understanding of conditions, processes, and relations of saltwater to groundwater withdrawal in the Virginia Coastal Plain aquifer system. A strategy for monitoring saltwater movement is based on spatial relations between the saltwater-transition zone and 612 groundwater-production...

Mcfarland, E. Randolph
McFarland, E.R., 2015, A conceptual framework and monitoring strategy for movement of saltwater in the Coastal Plain aquifer system of Virginia: U.S. Geological Survey Scientific Investigations Report 2015–5117, 30 p., 1 pl., http://dx.doi.org/10.3133/sir20155117.

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Year Published: 2015

Effects of urbanization and stormwater control measures on streamflows in the vicinity of Clarksburg, Maryland, USA

Understanding the efficacy of revised watershed management methods is important to mitigating the impacts of urbanization on streamflow. We evaluated the influence of land use change, primarily as urbanization, and stormwater control measures on the relationship between precipitation and stream discharge over an 8-year period for five catchments...

Rhea, Lee; Jarnagin, Taylor; Hogan, Dianna M.; Loperfido, J. V.; Shuster, William
Rhea, L., Jarnagin, T., Hogan, D., Loperfido, J., Shuster, W., 2015, Effects of urbanization and stormwater control measures on streamflows in the vicinity of Clarksburg, Maryland, USA: Hydrological Processes, DOI: 10.1002/hyp.10505, last accessed June 22, 2015, at http://onlinelibrary.wiley.com/doi/10.1002/hyp.10505/full.

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Year Published: 2015

Geochemical and mineralogical characteristics of REE in granite-derived regolith: a model for the Southeast United States

Rare earth element (REE) ion-adsorption clay deposits are of global economic importance because they currently supply a significant portion of the world’s annual production of both light (LREE) and heavy REE (HREE). There is considerable ambiguity regarding the origin of this deposit type: The main criteria include the presence of large,...

Foley, Nora K.; Bern, Carleton R.; Ayuso, Robert A.; Hubbard, Bernard E.; Shah, Anjana K.

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Year Published: 2015

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...

Warwick, Peter D.; Corum, M.D.; Roberts-Ashby, Tina L.; Brennan, Sean T.; Merrill, Matthew D.; Blondes, Madalyn S.; Freeman, P.A.; Cahan, Steven M.; DeVera, Christina A.; Lohr, Celeste D.
Roberts-Ashby, T.L., Brennan, S.T., Merrill, M.D., Blondes, M.S., Freeman, P.A., Cahan, S.M., DeVera, C.A., and Lohr, C.D., 2015, Geologic framework for the national assessment of carbon dioxide storage resources—South Florida Basin, chap. L of Warwick, P.D., and Corum, M.D., eds., Geologic framework for the national assessment of carbon dioxide storage resources: U.S. Geological Survey Open-File Report 2012–1024–L, 22 p., http://dx.doi.org/10.3133/ofr20121024L.

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Year Published: 2015

Hydrologic budget and conditions of Permian, Pennsylvanian, and Mississippian aquifers in the Appalachian Plateaus physiographic province

In response to challenges to groundwater availability posed by historic land-use practices, expanding development of hydrocarbon resources, and drought, the U.S. Geological Survey Groundwater Resources Program began a regional assessment of the Appalachian Plateaus aquifers in 2013 that incorporated a hydrologic landscape approach to estimate all...

McCoy, Kurt J.; Yager, Richard M.; Nelms, David L.; Ladd, David E.; Monti,, Jack; Kozar, Mark D.
McCoy, K.J., Yager, R.M., Nelms, D.L., Ladd, D.E., Monti, Jack, Jr., and Kozar, M.D., 2015, Hydrologic budget and conditions of Permian, Pennsylvanian, and Mississippian aquifers in the Appalachian Plateaus Physiographic Province (ver. 1.1, October 2015): U.S. Geological Survey Scientific Investigations Report 2015–5106, 77 p., http://dx.doi.org/10.3133/sir20155106.

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Year Published: 2015

Geospatial compilation of results from field sample collection in support of mineral resource investigations, Western Alaska Range, Alaska, July 2013

This Data Series summarizes results from July 2013 sampling in the western Alaska Range near Mount Estelle, Alaska. The fieldwork combined in situ and camp-based spectral measurements of talus/soil and rock samples. Five rock and 48 soil samples were submitted for quantitative geochemi­cal analysis (for 55 major and trace elements), and the 48...

Johnson, Michaela R.; Graham, Garth E.; Hubbard, Bernard E.; Benzel, William M.
Johnson, M.R., Graham, G.E., Hubbard, B.E., and Benzel, W.M., 2015, Geospatial compilation of results from field sample collection in support of mineral resource investigations, Western Alaska Range, Alaska, July 2013: U.S. Geological Survey Data Series 943, 12 p., http://dx.doi.org/10.3133/ds943.

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Year Published: 2015

The hydrogeology of urbanization: The lost springs of Washington, D.C., late Tertiary and Quaternary sediments of D.C., and the Baltimore Long Term Ecological Research site (LTER): Chapter

Urbanization is a major process now shaping the environment. This field trip looks at the hydrogeology of the general Washington, D.C., area and focuses on the city's lost springs. Until 150 years ago, springs and shallow dug wells were the main source of drinking water for residents of Washington, D.C. Celebrating the nation's bicentennial,...

Bhaskar, Aditi; Pavich, Milan J.; Sharp, John M.
Bhaskar, A.S., Pavich, M., Sharp Jr., J.M., 2015, The hydrogeology of urbanization: The lost springs of Washington, D.C., late Tertiary and Quaternary sediments of D.C., and the Baltimore Long Term Ecological Research site (LTER) in Brezinski, D.K., Halka, J.P., and Ortt, R.A., Jr., eds., Tripping from the Fall Line-Field Excursions for the GSA Annual Meeting, Baltimore, 2015: Geological Society of America Field Guide, v. 40, p. 499–517, doi:10.1130/2015.0040(13).

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Year Published: 2015

Mapping of coal quality using stochastic simulation and isometric logratio transformation with an application to a Texas lignite

Coal is a chemically complex commodity that often contains most of the natural elements in the periodic table. Coal constituents are conventionally grouped into four components (proximate analysis): fixed carbon, ash, inherent moisture, and volatile matter. These four parts, customarily measured as weight losses and expressed as percentages, share...

Olea, Ricardo A.; Luppens, James A.

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Year Published: 2015

Alteration, slope-classified alteration, and potential lahar inundation maps of volcanoes for the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Volcano Archive

This study identifies areas prone to lahars from hydrothermally altered volcanic edifices on a global scale, using visible and near infrared (VNIR) and short wavelength infrared (SWIR) reflectance data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and digital elevation data from the ASTER Global Digital Elevation...

Mars, John C.; Hubbard, Bernard E.; Pieri, David; Linick, Justin
Mars, J.C., Hubbard, B., Pieri, D., and Linick, J.L., 2014, Alteration, Slope-Classified Alteration, and Potential Lahar Inundation Maps of Volcanoes for the Advanced Spaceborne Thermal Emission And Reflection Radiometer (ASTER) Volcanoes Archive: U.S. Geological Survey Scientific Investigations Report 2015–xxxx, xx p., http://www.dx.doi.org/10.3133/sir2015XXXX.

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Year Published: 2015

Enhanced microbial coalbed methane generation: A review of research, commercial activity, and remaining challenges

Coalbed methane (CBM) makes up a significant portion of the world’s natural gas resources. The discovery that approximately 20% of natural gas is microbial in origin has led to interest in microbially enhanced CBM (MECoM), which involves stimulating microorganisms to produce additional CBM from existing production wells. This paper reviews current...

Ritter, Daniel J.; Vinson, David S.; Barnhart, Elliott P.; Akob, Denise M.; Fields, Matthew W.; Cunningham, Al B.; Orem, William H.; McIntosh, Jennifer C.