Beringia: Intercontinental exchange and diversification of high latitude mammals and their parasites during the Pliocene and Quaternary
Joseph A. Cook, Eric P. Hoberg, Anson V. Koehler, Heikki Henttonen, Lotta Wickstrom, Voitto Haukisalmi, Kurt E. Galbreath, Felix Chernyavski, Nikolai Dokuchaev, Anatoli Lahzuhtkin, Stephen O. MacDonald, Andrew G. Hope, Eric Waltari, Amy Runck, Alasdair Veitch, Emily Jenkins, Susan Kutz, Ralph P. Eckerlin
2005, Mammal Study (30) S33-S44
Beringia is the region spanning eastern Asia and northwestern North America that remained ice-free during the full glacial events of the Pleistocene. Numerous questions persist regarding the importance of this region in the evolution of northern faunas. Beringia has been implicated as both a high latitude refugium and as the...
Precambrian crystalline basement map of Idaho: An interpretation of aeromagnetic anomalies
P.K. Sims, Karen Lund, E. Anderson
2005, Scientific Investigations Map 2884
Idaho lies within the northern sector of the U.S. Cordillera astride the boundary between the Proterozoic continent (Laurentia) to the east and the Permian to Jurassic accreted terranes to the west. The continental...
Radioisotopic and biostratigraphic age relations in the Coast Range Ophiolite, northern California: Implications for the tectonic evolution of the Western Cordillera
John W. Shervais, Benita L. Murchey, David L. Kimbrough, Paul R. Renne, Barry Hanan
2005, GSA Bulletin (117) 633-653
The Coast Range ophiolite (CRO) in northern California includes two distinct remnants. The Elder Creek ophiolite is a classic suprasubduction zone ophiolite with three sequential plutonic suites (layered gabbro, wehrlit-pyroxenite, quartz diorite), a mafic to felsic dike complex, and mafic-felsic volcanic rocks; the entire suite is cut by late mid-oceanic-ridge...
Chemical characteristics of ground-water discharge along the south rim of Grand Canyon in Grand Canyon National Park, Arizona, 2000-2001
Stephen A. Monroe, Ronald C. Antweiler, Robert J. Hart, Howard E. Taylor, Margot Truini, John R. Rihs, Tracey J. Felger
2005, Scientific Investigations Report 2004-5146
Springs flowing from the south rim of Grand Canyon are an important resource of Grand Canyon National Park, offering refuge to endemic and exotic terrestrial wildlife species and maintaining riparian areas. Population growth on the Coconino Plateau has increased the demand for additional development of ground-water resources, and such development...
Water-quality, phytoplankton, and trophic-status characteristics of Big Base and Little Base lakes, Little Rock Air Force Base, Arkansas, 2003-2004
B. G. Justus
2005, Scientific Investigations Report 2005-5068
Little Rock Air Force Base is the largest C-130 base in the Air Force and is the only C-130 training base in the Department of Defense. Little Rock Air Force Base is located in central Arkansas near the eastern edge of the Ouachita Mountains, near the Mississippi Alluvial Plain, and...
Comparison of methods for estimating ground-water recharge and base flow at a small watershed underlain by fractured bedrock in the Eastern United States
Dennis W. Risser, William J. Gburek, Gordon J. Folmar
2005, Scientific Investigations Report 2005-5038
This study by the U.S. Geological Survey (USGS), in cooperation with the Agricultural Research Service (ARS), U.S. Department of Agriculture, compared multiple methods for estimating ground-water recharge and base flow (as a proxy for recharge) at sites in east-central Pennsylvania underlain by fractured bedrock and representative of a humid-continental climate....
Effects of historical coal mining and drainage from abandoned mines on streamflow and water quality in Bear Creek, Dauphin County, Pennsylvania — March 1999–December 2002
Jeffrey J. Chaplin
2005, Scientific Investigations Report 2005-5042
More than 100 years of anthracite coal mining has changed surface- and ground-water hydrology and contaminated streams draining the Southern Anthracite Coal Field in east-central Pennsylvania. Bear Creek drains the western prong of the Southern Anthracite Coal Field and is affected by metals in drainage from abandoned mines and streamwater...
Acid-rock drainage at Skytop, Centre County, Pennsylvania, 2004
Jane M. Hammarstrom, Keith Brady, Charles A. Cravotta III,
2005, Open-File Report 2005-1148
Recent construction for Interstate Highway 99 (I?99) exposed pyrite and associated Zn-Pb sulfide minerals beneath a >10-m thick gossan to oxidative weathering along a 40-60-m deep roadcut through a 270-m long section of the Ordovician Bald Eagle Formation at Skytop, near State College, Centre County, Pennsylvania. Nearby Zn-Pb deposits hosted...
Evaluation of ground-water flow and land-surface subsidence caused by hypothetical withdrawals in the northern part of the Gulf Coast Aquifer system, Texas
Mark C. Kasmarek, Brian D. Reece, Natalie A. Houston
2005, Scientific Investigations Report 2005-5024
During 2003–04 the U.S. Geological Survey, in cooperation with the Texas Water Development Board (TWDB) and the Harris-Galveston Coastal Subsidence District (HGCSD), used the previously developed Northern Gulf Coast Ground-Water Availability Modeling (NGC GAM) model to evaluate the effects of hypothetical projected withdrawals on ground-water flow in the northern part...
Tephra layers of Blind Spring Valley and related upper Pliocene and Pleistocene tephra layers, California, Nevada, and Utah: Isotopic ages, correlation, and magnetostratigraphy
Andrei M. Sarna-Wojcicki, Marith C. Reheis, Malcolm S. Pringle, Robert J. Fleck, Doug Burbank, Charles E. Meyer, Janet L. Slate, Elmira Wan, James R. Budahn, Bennie Troxel, James P. Walker
2005, Professional Paper 1701
Numerical ages have been determined for a stratigraphic sequence of silicic tephra layers exposed at the Cowan Pumice Mine in Blind Spring Valley, near Benton Hot Springs, east-central California, as well as at Chalk Cliffs, north of Bishop, Calif. The tephra layers at these sites were deposited after eruptions from...
Reconnaissance gas measurements on the East Rift Zone of Kilauea Volcano, Hawai'i by Fourier transform infrared spectroscopy
Kenneth A. McGee, Tamar Elias, A. Jefferson Sutton, Michael P. Doukas, Peter G. Zemek, Terrence M. Gerlach
2005, Open-File Report 2005-1062
We report the results of a set of measurements of volcanic gases on two small ground level plumes in the vicinity of Pu`u `O`o cone on the middle East Rift Zone (ERZ) of Kilauea volcano, Hawai`i on 15 June 2001 using open-path Fourier transform infrared (FTIR) spectroscopy. The work was...
87Sr/86Sr sourcing of ponderosa pine used in Anasazi great house construction at Chaco Canyon, New Mexico
Amanda C. Reynolds, Julio L. Betancourt, Jay Quade, P. Jonathan Patchett, Jeffery S. Dean, John Stein
2005, Journal of Archaeological Science (32) 1061-1075
Previous analysis of 87Sr/86Sr ratios shows that 10th through 12th century Chaco Canyon was provisioned with plant materials that came from more than 75 km away. This includes (1) corn (Zea mays) grown on the eastern flanks of the Chuska Mountains and floodplain of the San Juan River to the...
Radiochemical and chemical constituents in water from selected wells and springs from the southern boundary of the Idaho National Laboratory to the Hagerman Area, Idaho, 2003
Gordon W. Rattray, Amy J. Wehnke, L. Flint Hall, Linford J. Campbell
2005, Open-File Report 2005-1125
The U.S. Geological Survey and the Idaho Department of Water Resources, in cooperation with the U.S. Department of Energy, sampled water from 14 sites as part of an ongoing study to monitor the water quality of the eastern Snake River Plain aquifer between the southern boundary of the Idaho National...
Water resources and the urban environment, lower Charles River watershed, Massachusetts, 1630-2005
Peter K. Weiskel, Lora K. Barlow, Tomas W. Smieszek
2005, Circular 1280
The Charles River, one of the Nation’s most historically significant rivers, flows through the center of the Boston metropolitan region in eastern Massachusetts. The lower Charles River, downstream of the original head of tide in Watertown, was originally a productive estuary and important source of fish and shellfish for the...
Simulation of ground-water flow in the basin-fill aquifer of the Tularosa Basin, south-central New Mexico, predevelopment through 2040
Glenn F. Huff
2005, Scientific Investigations Report 2004-5197
The hydrology of the basin-fill aquifer in the Tularosa Basin was evaluated through construction and calibration of steady-state and transient three-dimensional ground-water-flow simulations. Simulations were made using the U.S. Geological Survey finite-difference modular ground-water-flow computer software MODFLOW-96. The transient simulation covered 1948-2040. Both steady-state and transient simulations were calibrated by...
Geological field trips in southern Idaho, eastern Oregon, and northern Nevada
Spencer H. Wood
Katherine M. Haller, editor(s)
2005, Open-File Report 2004-1222
No abstract available....
Virginia aeromagnetic and gravity maps and data: A web site for distribution of data
Stephen L. Snyder
2005, Open-File Report 2005-1052
No abstract available....
Coastal classification atlas: Southeastern Louisiana coastal classification maps -- Pass Abel to East Timbalier Island
Robert A. Morton, Russell L. Peterson
2005, Open-File Report 2005-1003
No abstract available....
Structure and mechanics of the San Andreas–San Gregorio fault junction, San Francisco, California
Tom Parsons, Terry R. Bruns, Ray W. Sliter
2005, Geochemistry, Geophysics, and Geosystems (6)
[1] The right‐lateral San Gregorio and San Andreas faults meet west of the Golden Gate near San Francisco. Coincident seismic reflection and refraction profiling across the San Gregorio and San Andreas faults south of their junction shows the crust between them to have formed shallow extensional basins that are dissected...
High-resolution seismic-reflection image of the Chesapeake Bay impact structure, NASA Langley Research Center, Hampton, Virginia
Rufus D. Catchings, David S. Powars, Gregory Gohn, Mark R. Goldman
2005, Professional Paper 1688-I
A 1-kilometer-long (0.62-mile-long) seismic reflection and refraction profile collected at the National Aeronautics and Space Administration (NASA) Langley Research Center, Hampton, Va., provides a detailed image of part of the annular trough of the buried, 35-million-year-old Chesapeake Bay impact structure. This profile passes within 5 meters (m; 16.4 feet (ft))...
Paleontology of the upper Eocene to quaternary postimpact section in the USGS-NASA Langley core, Hampton, Virginia
Lucy E. Edwards, John A. Barron, David Bukry, Laurel M. Bybell, Thomas M. Cronin, C. Wylie Poag, Robert E. Weems, G. Lynn Wingard
2005, Professional Paper 1688-H
The USGS-NASA Langley corehole was drilled in 2000 in Hampton, Va. The core serves as a benchmark for the study of calcareous nannofossils, dinoflagellates, diatoms and silico flagellates, mollusks, ostracodes, planktonic foraminifera and bolboformids, and vertebrate remains in the upper Eocene, Oligocene, Miocene, and Pliocene sediments in southeastern Virginia. These...
Studies of the Chesapeake Bay impact structure: The USGS-NASA Langley corehole, Hampton, Virginia, and related coreholes and geophysical surveys
J. Wright Horton Jr., David S. Powars, Gregory S. Gohn
2005, Professional Paper 1688
No abstract available....
Comparative phytosociological investigation of subalpine alder thickets in southwestern Alaska and the North Pacific
Stephen S. Talbot, Sandra L. Talbot, F. J. A. Daniels
2005, Report
We present the first vegetation analysis of subalpine alder (Alnus viridis) thickets in southwestern Alaska. The data are primarily from mesic, hilly and mountainous sites ranging from the westernmost tip of the Alaska Peninsula to the northern Kenai Peninsula, spanning 1,000 km on an E–W gradient and 700 km on...
Forestry practices and aquatic biodiversity: Fish
Robert E. Gresswell
2005, Technical Bulletin 908
In the Pacific Northwest, fish communities are found in a diverse array of aquatic habitats ranging from the large coastal rivers of the temperate rainforests, to the fragmented and sometimes ephemeral streams of the xeric interior basins, and high-elevation streams and lakes in the mountainous areas (Rieman et al. 2003)....
Sexual differentiation in the distribution potential of northern jaguars (Panthera onca)
Erin E. Boydston, Carlos A. Lopez Gonzalez
2005, Proceedings RMRS-P-36
We estimated the potential geographic distribution of jaguars in the southwestern United States and northwestern Mexico by modeling the jaguar ecological niche from occurrence records. We modeled separately the distribution of males and females, assuming records of females probably represented established home ranges while male records likely included dispersal movements....
