Conceptual model of the Great Basin carbonate and alluvial aquifer system
Victor M. Heilweil, Lynette E. Brooks, editor(s)
2011, Scientific Investigations Report 2010-5193
A conceptual model of the Great Basin carbonate and alluvial aquifer system (GBCAAS) was developed by the U.S. Geological Survey (USGS) for a regional assessment of groundwater availability as part of a national water census. The study area is an expansion of a previous USGS Regional Aquifer Systems Analysis (RASA)...
Hydrogeology and simulation of groundwater flow in the Arbuckle-Simpson aquifer, south-central Oklahoma
Scott Christenson, Noel I. Osborn, Christopher R. Neel, Jason R. Faith, Charles D. Blome, James Puckette, Michael P. Pantea
2011, Scientific Investigations Report 2011-5029
The Arbuckle-Simpson aquifer in south-central Oklahoma provides water for public supply, farms, mining, wildlife conservation, recreation, and the scenic beauty of springs, streams, and waterfalls. Proposed development of water supplies from the aquifer led to concerns that large-scale withdrawals of water would cause decreased flow in rivers and springs, which...
Geomorphic and ecological effects of Hurricanes Katrina and Rita on coastal Louisiana marsh communities
Sarai C. Piazza, Gregory D. Steyer, Kari F. Cretini, Charles E. Sasser, Jenneke M. Visser, Guerry O. Holm, Leigh A. Sharp, D. Elaine Evers, John R. Meriwether
2011, Open-File Report 2011-1094
Hurricanes Katrina and Rita made landfall in 2005, subjecting the coastal marsh communities of Louisiana to various degrees of exposure. We collected data after the storms at 30 sites within fresh (12), brackish/intermediate (12), and saline (6) marshes to document the effects of saltwater storm surge and sedimentation on marsh...
Tertiary volcanism in the eastern San Juan mountains
Peter W. Lipman, William C. McIntosh
2011, Book chapter, The eastern San Juan Mountains: Their ecology, geology, and human history
No abstract available....
Landscape unit based digital elevation model development for the freshwater wetlands within the Arthur C. Marshall Loxahatchee National Wildlife Refuge, Southeastern Florida
Zhixiao Xie, Zhongwei Liu, John W. Jones, Aaron L. Higer, Pamela A. Telis
2011, Applied Geography (31) 401-412
The hydrologic regime is a critical limiting factor in the delicate ecosystem of the greater Everglades freshwater wetlands in south Florida that has been severely altered by management activities in the past several decades. "Getting the water right" is regarded as the key to successful restoration of this unique wetland...
A critical review of published coal quality data from the southwestern part of the Powder River Basin, Wyoming
James A. Luppens
2011, Open-File Report 2011-1148
A review of publicly available coal quality data during the coal resource assessment of the southwestern part of the Powder River Basin, Wyoming (SWPRB), revealed significant problems and limitations with those data. Subsequent citations of data from original sources often omitted important information, such as moisture integrity and information needed...
Probability and volume of potential postwildfire debris flows in the 2011 Wallow burn area, eastern Arizona
Barbara C. Ruddy
2011, Open-File Report 2011-1214
This report presents a preliminary emergency assessment of the debris-flow hazards from drainage basins burned in 2011 by the Wallow wildfire in eastern Arizona. Empirical models derived from statistical evaluation of data collected from recently burned drainage basins throughout the intermountain western United States were used to estimate the probability...
Assessment of undiscovered oil and gas resources of the Devonian Marcellus Shale of the Appalachian Basin Province
James L. Coleman Jr., Robert C. Milici, Troy A. Cook, Ronald R. Charpentier, Mark Kirshbaum, Timothy R. Klett, Richard M. Pollastro, Christopher J. Schenk
2011, Fact Sheet 2011-3092
Using a geology-based assessment methodology, the U.S. Geological Survey (USGS) estimated a mean undiscovered natural gas resource of 84,198 billion cubic feet and a mean undiscovered natural gas liquids resource of 3,379 million barrels in the Devonian Marcellus Shale within the Appalachian Basin Province. All this resource occurs in...
Reported historic asbestos mines, historic asbestos prospects, and other natural occurrences of asbestos in California
Bradley S. Van Gosen, John P. Clinkenbeard
2011, Open-File Report 2011-1188
The map (Plate.pdf), pamphlet (Pamphlet.pdf), and the accompanying datasets in this report provide information for 290 sites in California where asbestos occurs in natural settings, using descriptions found in the geologic literature. Data on location, mineralogy, geology, and relevant literature for each asbestos site are provided. Using the map and...
Exploration case study using indicator minerals in till at the giant Pebble porphyry Cu-Au-Mo deposit, southwest Alaska, USA
Robert G. Eppinger, Karen D. Kelley, David L. Fey, Stuart A. Giles, Steven G. Smith
2011, Conference Paper, Indicator mineral methods in mineral exploration: Workshop in the 25th International Applied Geochemistry Symposium 2011, 22-26 August 2011 Rovaniemi, Finland
The Pebble deposit in southwest Alaska (Fig. 1) contains one of the largest resources of copper and gold in the world. It includes a measured and indicated resource of 5,942 million tonnes (Mt) at 0.42% Cu, 0.35 g/t Au, and 250 ppm Mo (0.30% copper equivalent, CuEQ, cut off) and...
Ecological influence and pathways of land use in sagebrush
Steven T. Knick, Steven E. Hanser, Richard F. Miller, David A. Pyke, Michael J. Wisdom, Sean P. Finn, E. Thomas Rinkes, Charles J. Henny
Steven T. Knick, John W. Connelly, editor(s)
2011, Book chapter, Greater sage-grouse: Ecology and conservation of a landscape species and its habitats
Land use in sagebrush (Artemisia spp.) landscapes influences all sage-grouse (Centrocer-cus spp.) populations in western North America. Croplands and the network of irrigation canals cover 230,000 km2 and indirectly influence up to 77% of the Sage-Grouse Conservation Area and 73% of sagebrush land cover by subsidizing synanthropic predators on sage-grouse....
Analysis of the North American Breeding Bird Survey using hierarchical models
John R. Sauer, William Link
2011, The Auk (128) 87-98
We analyzed population change for 420 bird species from the North American Breeding Bird Survey (BBS) using a hierarchical log-linear model and compared the results with those obtained through route-regression analysis. Survey-wide trend estimates based on the hierarchical model were generally more precise than estimates from the earlier analysis. No...
IUPAC Periodic Table of the Isotopes
N.E. Holden, T.B. Coplen, J.K. Böhlke, M.E. Wieser, G. Singleton, T. Walczyk, S. Yoneda, P.G. Mahaffy, L.V. Tarbox
2011, Chemistry International (33)
For almost 150 years, the Periodic Table of the Elements has served as a guide to the world of elements by highlighting similarities and differences in atomic structure and chemical properties. To introduce students, teachers, and society to the existence and importance of isotopes of the chemical elements, an IUPAC...
Factors affecting groundwater quality in the Valley and Ridge aquifers, eastern United States, 1993-2002
Gregory C. Johnson, Tammy M. Zimmerman, Bruce D. Lindsey, Eliza L. Gross
2011, Scientific Investigations Report 2011-5115
Chemical and microbiological analyses of water from 230 wells and 35 springs in the Valley and Ridge Physiographic Province, sampled between 1993 and 2002, indicated that bedrock type (carbonate or siliciclastic rock) and land use were dominant factors influencing groundwater quality across a region extending from northwestern Georgia to New...
Gas, oil, and water production from Wattenberg Field in the Denver Basin, Colorado
Philip H. Nelson, Stephen L. Santus
2011, Open-File Report 2011-1175
Gas, oil, and water production data were compiled from selected wells in two tight gas reservoirs-the Codell-Niobrara interval, comprised of the Codell Sandstone Member of the Carlile Shale and the Niobrara Formation; and the Dakota J interval, comprised mostly of the Muddy (J) Sandstone of the Dakota Group; both intervals...
Constraining the age and magnitude of uplift in the northern National Petroleum Reserve in Alaska (NPRA): Apatite fission-track analysis of samples from three wells
David W. Houseknecht, Kenneth J. Bird, Paul O'Sullivan
2011, Professional Paper 1784-A
A broad, post-mid-Cretaceous uplift is defined in the northern National Petroleum Reserve in Alaska (NPRA) by regional truncation of Cretaceous strata, thermal maturity patterns, and amounts of exhumation estimated from sonic logs. Apatite fission-track (AFT) analysis of samples from three wells (South Meade No. 1, Topagoruk No. 1, and Ikpikpuk...
Identification of last interglacial deposits in eastern Beringia: a cautionary note from the Palisades, interior Alaska
Alberto V. Reyes, Grant D. Zazula, Svetlana Kuzmina, Thomas A. Ager, Duane G. Froese
2011, Journal of Quaternary Science (26) 345-352
Last interglacial sediments in unglaciated Alaska and Yukon (eastern Beringia) are commonly identified by palaeoecological indicators and stratigraphic position ~2-5m above the regionally prominent Old Crow tephra (124 + or - 10ka). We demonstrate that this approach can yield erroneous age assignments using data from a new exposure at the...
Population status and population genetics of northern leopard frogs in Arizona
Tad C. Theimer, Charles A. Drost, Ryan P. O’Donnell, Karen E. Mock
2011, Open-File Report 2011-1186
Increasing isolation of populations by habitat fragmentation threatens the persistence of many species, both from stochastic loss of small isolated populations, and from inbreeding effects in populations that have become genetically isolated. In the southwestern United States, amphibian habitat is naturally patchy in occurrence because of the prevailing aridity of...
Estimated suspended-sediment loads and yields in the French and Brandywine Creek Basins, Chester County, Pennsylvania, water years 2008-09
Ronald A. Sloto, Leif E. Olson
2011, Scientific Investigations Report 2011-5109
Turbidity and suspended-sediment concentration data were collected by the U.S. Geological Survey (USGS) at four stream stations--French Creek near Phoenixville, West Branch Brandywine Creek near Honey Brook, West Branch Brandywine Creek at Modena, and East Branch Brandywine Creek below Downingtown--in Chester County, Pa. Sedimentation and siltation is the leading cause...
Geophysical logs and water-quality data collected for boreholes Kimama-1A and -1B, and a Kimama water supply well near Kimama, southern Idaho
Brian V. Twining, Roy C. Bartholomay
2011, Data Series 622
In September 2010, a research consortium led by scientists from Utah State University began drilling the first of three continuously cored boreholes on the Snake River Plain in southern Idaho. The goals of this effort, the Snake River Scientific Drilling Project, are to study the interaction between the Earth's crust...
Assessment of the geomorphic effects of large floods using streamgage data: The 1951 floods in eastern Kansas, USA
Mark W. Bowen, Kyle E. Juracek
2011, Physical Geography (32) 52-77
Data from 23 U.S. Geological Survey (USGS) streamgages were analyzed to assess the geomorphic effects (short-term change and subsequent recovery) of the record 1951 floods on streams in eastern Kansas. Flood-related, channel-bed elevation change was indicated for 17 gage sites, with substantial deposition at five sites and substantial erosion at...
Implications of discontinuous elevation gradients on fragmentation and restoration in patterned wetlands
Christa L. Zweig, Brian E. Reichert, Wiley M. Kitchens
2011, Ecosphere (2) 1-14
Large wetlands around the world face the possibility of degradation, not only from complete conversion, but also from subtle changes in their structure and function. While fragmentation and isolation of wetlands within heterogeneous landscapes has received much attention, the disruption of spatial patterns/processes within large wetland systems and the resulting...
Significance of zircon U-Pb ages from the Pescadero felsite, west-central California coast ranges
Robert J. McLaughlin, Diane E. Moore, W.G. Ernst, UWE C. Martens, J. C. Clark
2011, Geological Society of America Bulletin (123) 1497-1512
Weathered felsite is associated with the late Campanian–Maastrichtian Pigeon Point Formation near Pescadero, California. Poorly exposed, its age and correlation are uncertain. Is it part of the Pigeon Point section west of the San Gregorio–Hosgri fault? Does it rest on Nacimiento block basement? Is it dextrally offset from the Oligocene...
Surficial geologic map of the Elizabethtown 30' x 60' quadrangle, North Carolina
Robert E. Weems, William C. Lewis, E. Allen Crider
2011, Open-File Report 2011-1121
The Elizabethtown 30' x 60' quadrangle is located in southeastern North Carolina between Fayetteville and Wilmington. Most of the area is flat to gently rolling, although steep slopes occur locally along some of the larger streams. Total relief in the area is slightly over 210 feet (ft), with elevations ranging...
Detailed sections from auger holes in the Elizabethtown 1:100,000-scale quadrangle, North Carolina
Robert E. Weems, William C. Lewis, Joseph H. Murray, David B. Queen, Jeffrey B. Grey, Benjamin D. DeJong
2011, Open-File Report 2011-1115
The Elizabethtown 1:100,000 quadrangle is in the west-central part of the Coastal Plain of southeastern North Carolina. The Coastal Plain, in this region, consists mostly of unlithified sediments that range in age from Late Cretaceous to Holocene. These sediments lie with profound unconformity on complexly deformed metamorphic and igneous rocks...
