H.A. Lowers, B.G. Rusk
2006, Conference Paper, Microscopy and Microanalysis
[No abstract available]...
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Publication Extents
Not all publications have extents, not all extents are completely accurateJohn L. Dwyer
J.J. Qu, W. Gao, M. Kafatos, R.E. Murphy, V.V. Salomonson, editor(s)
2006, Book chapter, Earth science satellite remote sensing— Data, computational processing, and tools
The Center for Earth Resources Observation Systems (EROS) is a field center of the geography discipline within the US geological survey (USGS) of the Department of the Interior. The EROS Data Center (EDC) was established in the early 1970s as the nation’s principal archive of remotely sensed data. Initially the...
John L. Dwyer, Gail L. Schmidt
J.J. Qu, W. Gao, M. Kafatos, R.E. Murphy, V.V. Salomonson, editor(s)
2006, Book chapter, Earth science satellite remote sensing— Data, computational processing, and tools
The MODIS Reprojection Tool (MRT) is designed to help individuals work with MODIS Level-2G, Level-3, and Level-4 land data products. These products are referenced to a global tiling scheme in which each tile is approximately 10° latitude by 10° longitude and non-overlapping (Fig. 9.1). If desired, the user may reproject...
R. Marple, R. Miller
2006, Southeastern Geology (44) 101-127
Seismic-reflection data were integrated with other geophysical, geologic, and seismicity data to better determine the location and nature of buried faults in the Charleston, South Carolina, region. Our results indicate that the 1886 Charleston, South Carolina, earthquake and seismicity near Summerville are related to local stresses caused by a 12??...
N.K. Adams, Bruce F. Houghton, W. Hildreth
2006, Bulletin of Volcanology (69) 189-206
Plinian/ignimbrite activity stopped briefly and abruptly 16 and 45 h after commencement of the 1912 Novarupta eruption defining three episodes of explosive volcanism before finally giving way after 60 h to effusion of lava domes. We focus here on the processes leading to the termination of the second and third...
Steve H. Harris Jr., Jonathan D. Istok, Joseph M. Suflita
2006, Microbial Ecology (51) 535-542
In situ experiments were conducted to measure sulfate reduction rates and identify rate-limiting factors in a shallow, alluvial aquifer contaminated with municipal landfill leachate. Single-well, push–pull tests conducted in a well adjacent to the landfill with >8 mM dissolved organic carbon (DOC) exhibited a sulfate reduction rate of 3.2 μmol...
David L. Waldien, John P. Hayes
2006, Fact Sheet 2006-3100
HIGHLIGHT: A variety of harvest methods promote diversity within forests while still generating income. For example, recent studies have shown that when dead wood is left on the forest floor during harvest, biodiversity increases. A new Cooperative Forest Ecosystem Research (CFER) program fact sheet summarizes how small mammals respond to...
K. Moran, J. Backman, H. Brinkhuis, S.C. Clemens, Thomas M. Cronin, G.R. Dickens, F. Eynaud, J. Gattacceca, M. Jakobsson, R.W. Jordan, M. Kaminski, J. King, N. Koc, A. Krylov, N. Martinez, J. Matthiessen, D. McInroy, T.C. Moore, J. Onodera, M. O’Regan, H. Palike, B. Rea, D. Rio, T. Sakamoto, D. C. Smith, R. Stein, John K. St, I. Suto, N. Suzuki, K. Takahashi, M. E. Watanabe, M. Yamamoto, J. Farrell, M. Frank, P. Kubik, W. Jokat, Y. Kristoffersen
2006, Nature (441) 601-605
The history of the Arctic Ocean during the Cenozoic era (0–65 million years ago) is largely unknown from direct evidence. Here we present a Cenozoic palaeoceanographic record constructed from >400 m of sediment core from a recent drilling expedition to the Lomonosov ridge in the Arctic Ocean. Our record shows a...
William A. DiMichele, N.J. Tabor, D.S. Chaney, W.J. Nelson
2006, Special Paper of the Geological Society of America 223-248
Diverse wetland vegetation flourished at the margins of the Midland Basin in north-central Texas during the Pennsylvanian Period. Extensive coastal swamps and an ever-wet, tropical climate supported lush growth of pteridosperm, marattialean fern, lycopsid, and calamite trees, and a wide array of ground cover and vines. As the Pennsylvanian passed...
J.A.K. Mazet, G.E. Hamilton, L.A. Dierauf
2006, Journal of Veterinary Medical Education (33) 352-360
In the last 10 years, the field of zoological medicine has seen an expansive broadening into the arenas of free-ranging wildlife, conservation medicine, and ecosystem health. During the spring/summer of 2005, we prepared and disseminated a survey designed to identify training and educational needs for individuals entering the wildlife medicine...
P.M. Groffman, Jill Baron, T. Blett, A.J. Gold, I. Goodman, L.H. Gunderson, B.M. Levinson, Margaret A. Palmer, H.W. Paerl, G.D. Peterson, N.L. Poff, D.W. Rejeski, J.F. Reynolds, M.G. Turner, K.C. Weathers, J. Wiens
2006, Ecosystems (9) 1-13
An ecological threshold is the point at which there is an abrupt change in an ecosystem quality, property or phenomenon, or where small changes in an environmental driver produce large responses in the ecosystem. Analysis of thresholds is complicated by nonlinear dynamics and by multiple factor controls that operate at...
Douglas A. George, Guy Gelfenbaum, Giles Lesser, Andrew W. Stevens
2006, Open-File Report 2006-1318
Continual sediment accumulation in Capitol Lake since the damming of the Deschutes River in 1951 has altered the initial morphology of the basin. As part of the Deschutes River Estuary Feasibility Study (DEFS), the United States Geological Survey (USGS) was tasked to model how tidal and storm processes will influence...
Jonathan M. Friedman, G.T. Auble, E.D. Andrews, G. Kittel, R.F. Madole, E.R. Griffin, Tyler M. Allred
2006, Western North American Naturalist (66) 78-91
This study explores how the relationship between flow and riparian vegetation varies along a montane river. We mapped occurrence of woody riparian plant communities along 58 km of the San Miguel River in southwestern Colorado. We determined the recurrence interval of inundation for each plant community by combining step-backwater hydraulic...
Cynthia P. Melcher, Susan K. Skagen, Lori Randall
2006, Open-File Report 2006-1033
An essential component of shorebird conservation is identifying, protecting, and managing high-priority stopover sites and migration habitats crucial to the long-term persistence of migrating shorebirds. Because of the tremendous variability in migrant shorebird occurrence patterns in the Prairie Pothole Region of the U.S. (Skagen 1997), it is labor- and cost-intensive...
Timothy P. Brabets, Robert T. Ourso
2006, Scientific Investigations Report 2006-5151
The U.S. Geological Survey and the National Park Service conducted a water-quality investigation of the Crescent River Basin in Lake Clark National Park and Preserve from May 2003 through September 2004. The Crescent River Basin was studied because it has a productive sockeye salmon run that is important to the...
G.T. Auble, J. E. Roelle, A. TImberman
2006, The Green Line, Colorado Riparian Association Newsletter (17) 1-5
Riparian willow communities along the Illinois River at Arapaho National Wildlife Refuge in North Park near Walden, Colorado, provide important habitat for a number of wildlife species, including neotropical migratory birds. Existing stands in the northern (downstream) portion of the refuge are sparse and discontinuous (Photo 1) compared to upstream...
S.M. Wilson, M.J. Madel, D.J. Mattson, J.M. Graham, T. Merrill
2006, Biological Conservation (130) 47-59
We used multiple logistic regression to model how different landscape conditions contributed to the probability of human-grizzly bear conflicts on private agricultural ranch lands. We used locations of livestock pastures, traditional livestock carcass disposal areas (boneyards), beehives, and wetland-riparian associated vegetation to model the locations of 178 reported human-grizzly bear...
C.R. Fenton, R. H. Webb, T.E. Cerling
2006, Quaternary Research (65) 324-335
The failure of a lava dam 165,000 yr ago produced the largest known flood on the Colorado River in Grand Canyon. The Hyaloclastite Dam was up to 366 m high, and geochemical evidence linked this structure to outburst-flood deposits that occurred for 32 km downstream. Using the Hyaloclastite outburst-flood deposits...
J. W. Godt, R.L. Baum, A.F. Chleborad
2006, Earth Surface Processes and Landforms (31) 97-110
Shallow landsliding in the Seattle, Washington, area, has caused the occasional loss of human life and millions of dollars in damage to property. The effective management of the hazzard requires an understanding of the rainfall conditions that result in landslides. We present an empirical approach to quantify the antecedent moisture...
R. B. Wanty, B. R. Berger
2006, Journal of Geochemical Exploration (88) 162-165
Base- and precious-metal mineral deposits comprise anomalous concentrations of metals and associated elements, which may be useful subjects for study as analogs for migration of environmental contaminants. In the geologic past, hydrothermal mineral deposits formed at the intersection of favorable geologic, hydrologic and geochemical gradients. In the present, weathering of...
D.M. Saffer, B.A. Bekins
2006, Journal of Geophysical Research B: Solid Earth (111)
At many subduction zones, accretionary complexes form as sediment is off-scraped from the subducting plate. Mechanical models that treat accretionary complexes as critically tapered wedges of sediment demonstrate that pore pressure controls their taper angle by modifying basal and internal shear strength. Here, we combine a numerical model of groundwater...
Laszlo P. Keszthelyi, Stephen Self, Thorvaldur Thordarson
2006, Journal of the Geological Society (163) 253-264
Flood lavas are major geological features on all the major rocky planetary bodies. They provide important insight into the dynamics and chemistry of the interior of these bodies. On the Earth, they appear to be associated with major and mass extinction events. It is therefore not surprising that there has...
A.M. Farag, T. May, G.D. Marty, M. Easton, D.D. Harper, E. E. Little, L. Cleveland
2006, Aquatic Toxicology (76) 246-257
This study was designed to determine fish health impairment of Chinook salmon (Oncorhynchus tshawytscha) exposed to chromium. Juvenile Chinook salmon were exposed to aqueous chromium concentrations (0–266 μg l−1) that have been documented in porewater from bottom sediments and in well waters near salmon spawning areas in the Columbia River in the...
J.P. Hickey, S.A. Batterman, S.M. Chernyak
2006, Archives of Environmental Contamination and Toxicology (50) 97-110
Levels of chlorinated organic contaminants in predator fish have been monitored annually in each of the Great Lakes since the 1970s. This article updates earlier reports with data from 1991 to 1998 for lake trout (Salvelinus namaycush) and (Lake Erie only) walleye (Sander vitreus) to provide a record that now...
F. F. Pollitz, P. Banerjee, R. Burgmann, M. Hashimoto, N. Choosakul
2006, Geophysical Research Letters (33)
The 26 December 2004 Mw = 9.2 and 28 March 2005 Mw = 8.7 earthquakes on the Sumatra megathrust altered the state of stress over a large region surrounding the earthquakes. We evaluate the stress changes associated with coseismic and postseismic deformation following these two large events, focusing on postseismic...