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Page 178, results 4426 - 4450

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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...
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...
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...
Whole-rock and sulfide-mineral geochemical data for samples from volcanogenic massive sulfide deposits of the Bonnifield district, east-central Alaska
Cynthia Dusel-Bacon, John F. Slack, Alan E. Koenig, Nora K. Foley, Robert L. Oscarson, Kathleen D. Gans
2011, Open-File Report 2011-1171
This Open-File Report presents geochemical data for outcrop and drill-core samples from volcanogenic massive sulfide deposits and associated metaigneous and metasedimentary rocks in the Wood River area of the Bonnifield mining district, northern Alaska Range, east-central Alaska. The data consist of major- and trace-element whole-rock geochemical analyses, and major- and...
Geology and geochemistry of volcanic centers within the eastern half of the Sonoma volcanic field, northern San Francisco Bay region, California
Donald S. Sweetkind, James J. Rytuba, Victoria E. Langenheim, Robert J. Fleck
2011, Geosphere (7) 629-657
Volcanic rocks in the Sonoma volcanic field in the northern California Coast Ranges contain heterogeneous assemblages of a variety of compositionally diverse volcanic rocks. We have used field mapping, new and existing age determinations, and 343 new major and trace element analyses of whole-rock samples...
A petroleum system model for gas hydrate deposits in northern Alaska
T.D. Lorenson, Timothy S. Collett, Florence L. Wong
2011, Conference Paper
Gas hydrate deposits are common on the North Slope of Alaska around Prudhoe Bay, however the extent of these deposits is unknown outside of this area. As part of a United States Geological Survey (USGS) and the Bureau of Land Management (BLM) gas hydrate research collaboration, well cutting and mud...
Design of forest bird monitoring for strategic habitat conservation on Kaua'i Island, Hawai'i
Richard J. Camp, P. Marcos Gorresen
2011, Technical Report HCSU-022
This report was commissioned by the U.S. Fish and Wildlife Service (USFWS). The purpose was to develop a monitoring program for Kaua`i forest birds in the USFWS Strategic Habitat Conservation and adaptive management frameworks. Monitoring within those frameworks is a tool to assess resource responses to management and conservation actions,...
Beaufort Sea deep-water gas hydrate recovery from a seafloor mound in a region of widespread BSR occurrence
Patrick E. Hart, John W. Pohlman, T.D. Lorenson, Brian D. Edwards
2011, Conference Paper, Proceedings of the 7th international conference on gas hydrates (ICGH 2011)
Gas hydrate was recovered from the Alaskan Beaufort Sea slope north of Camden Bay in August 2010 during a U.S. Coast Guard Cutter Healy expedition (USCG cruise ID HLY1002) under the direction of the U.S. Geological Survey (USGS). Interpretation of multichannel seismic (MCS) reflection data collected in 1977 by the...
Simulating oil droplet dispersal from the Deepwater Horizon spill with a Lagrangian approach
Elizabeth W. North, E. Eric Adams, Zachary Schlag, Christopher R. Sherwood, Ruoying He, Hoon Hyun, Scott A. Socolofsky
2011, Book chapter, Monitoring and modeling the Deepwater Horizon oil spill: A record-breaking enterprise
An analytical multiphase plume model, combined with time-varying flow and hydrographic fields generated by the 3-D South Atlantic Bight and Gulf of Mexico model (SABGOM) hydrodynamic model, were used as input to a Lagrangian transport model (LTRANS), to simulate transport of oil droplets dispersed at depth from the recent Deepwater...
Lidar-revised geologic map of the Uncas 7.5' quadrangle, Clallam and Jefferson Counties, Washington
Rowland W. Tabor, Peter J. Haeussler, Ralph A. Haugerud, Ray E. Wells
2011, Scientific Investigations Map 3160
In 2000 and 2001, the Puget Sound Lidar Consortium obtained 1 pulse/m2 lidar data for about 65 percent of the Uncas 7.5' quadrangle. For a brief description of LIDAR (LIght Detection And Ranging) and this data acquisition program, see Haugerud and others (2003). This map combines geologic interpretation (mostly by...
Sea-Floor geology and character of Eastern Rhode Island Sound West of Gay Head, Massachusetts
L.J. Poppe, K.Y. McMullen, S.D. Ackerman, D.S. Blackwood, B.J. Irwin, J.D. Schaer, M.R. Forrest
2011, Open-File Report 2011-1004
Gridded multibeam bathymetry covers approximately 102 square kilometers of sea floor in eastern Rhode Island Sound west of Gay Head, Massachusetts. Although originally collected for charting purposes during National Oceanic and Atmospheric Administration hydrographic survey H11922, these acoustic data and the sea-floor stations subsequently occupied to verify them (1) show...
Geologic map of Saint Lawrence Island, Alaska
William W. Patton Jr., Frederic H. Wilson, Theresa A. Taylor
2011, Scientific Investigations Report 3146
Saint Lawrence Island is located in the northern Bering Sea, 190 km southwest of the tip of the Seward Peninsula, Alaska, and 75 km southeast of the Chukotsk Peninsula, Russia (see index map, map sheet). It lies on a broad, shallow-water continental shelf that extends from western Alaska to northeastern...
Depositional setting and geochemistry of phosphorites and metalliferous black shales in the Carboniferous-Permian Lisburne Group, Northern Alaska
Julie A. Dumoulin, John F. Slack, Michael T. Whalen, Anita G. Harris
2011, Professional Paper 1776-C
Phosphatic rocks are distributed widely in the Lisburne Group, a mainly Carboniferous carbonate succession that occurs throughout northern Alaska. New sedimentologic, paleontologic, and geochemical data presented here constrain the geographic and stratigraphic extent of these strata and their depositional and paleogeographic settings. Our findings support models that propose very high...
A Holocene record of endogenic iron and manganese precipitation, isotopic composition of endogenic carbonate, and vegetation history in a lake-fen complex in northwestern Minnesota
Walter E. Dean, Lisa A. Doner
2011, Open-File Report 2011-1106
Little Shingobee Lake and Fen are part of an extensive network of lakes and wetlands in the Shingobee River headwaters area of northwestern Minnesota. Prior to about 9800 radiocarbon years, most of the lakes in the Shingobee watershed area were interconnected to form glacial Lake Willobee. From 9800 to 7700...
Estimated 2008 groundwater potentiometric surface and predevelopment to 2008 water-level change in the Santa Fe Group aquifer system in the Albuquerque area, central New Mexico
Sarah E. Falk, Laura M. Bexfield, Scott K. Anderholm
2011, Scientific Investigations Map 3162
The water-supply requirements of the Albuquerque metropolitan area of central New Mexico have historically been met almost exclusively by groundwater withdrawal from the Santa Fe Group aquifer system. Previous studies have indicated that the large quantity of groundwater withdrawal relative to recharge has resulted in water-level declines in the aquifer...
Movement of bull trout in the upper Jarbidge River watershed, Idaho and Nevada, 2008-09--A supplement to Open-File Report 2010-1033
Carrie S. Munz, M. Brady Allen, Patrick J. Connolly
2011, Open-File Report 2011-1090
We monitored bull trout (Salvelinus confluentus) in 2008 and 2009 as a continuation of our work in 2006 and 2007, which involved the tagging of 1,536 bull trout with passive integrated transponder (PIT) tags in the East Fork Jarbidge River and West Fork Jarbidge River and their tributaries in northeastern...
Connecting pattern and process in greater sage-grouse populations and sagebrush landscapes
Steven T. Knick, Steven E. Hanser
Steven T. Knick, John W. Connelly, editor(s)
2011, Book chapter, Greater Sage-Grouse: Ecology and Conservation of a Landscape Species and Its Habitats
Abstract. Spatial patterns influence the processes that maintain Greater Sage-Grouse (Centrocercus urophasianus) populations and sagebrush (Artemisia spp.) landscapes on which they depend. We used connectivity analyses to: (1) delineate the dominant pattern of sagebrush landscapes; (2) identify regions of the current range-wide distribution of Greater Sage-Grouse important for conservation; (3)...
Assessment of in-place oil shale resources of the Green River Formation, Greater Green River Basin in Wyoming, Colorado, and Utah
R. C. Johnson, T.J. Mercier, Michael E. Brownfield
2011, Fact Sheet 2011-3063
The U.S. Geological Survey (USGS) recently (2011) completed an assessment of in-place oil shale resources, regardless of grade, in the Eocene Green River Formation of the Greater Green River Basin in southwestern Wyoming, northwestern Colorado, and northeastern Utah. Green River Formation oil shale also is present in the Piceance Basin...
A loess–paleosol record of climate and glacial history over the past two glacial–interglacial cycles (~ 150 ka), southern Jackson Hole, Wyoming
Kenneth L. Pierce, Daniel R. Muhs, Maynard A. Fosberg, Shannon A. Mahan, Joseph G. Rosenbaum, Joseph M. Licciardi, Milan J. Pavich
2011, Quaternary Research (76) 119-141
Loess accumulated on a Bull Lake outwash terrace of Marine Oxygen Isotope Stage 6 (MIS 6) age in southern Jackson Hole, Wyoming. The 9 m section displays eight intervals of loess deposition (Loess 1 to Loess 8, oldest), each followed by soil development. Our age-depth model is constrained by thermoluminescence,...
Comparative health assessment of western Pacific leatherback turtles (Dermochelys coriacea) foraging off the coast of California, 2005-2007
Heather S. Harris, Scott R. Benson, Kirsten V. Gilardi, Robert H. Poppenga, Thierry M. Work, Peter H. Dutton, Jonna A.K. Mazet
2011, Journal of Wildlife Diseases (47) 321-337
Leatherback turtles (Dermochelys coriacea) are critically endangered, primarily threatened by the overharvesting of eggs, fisheries entanglement, and coastal development. The Pacific leatherback population has experienced a catastrophic decline over the past two decades. Leatherbacks foraging off the coast of California are part of a distinct Western Pacific breeding stock that...
Improved earthquake monitoring in the central and eastern United States in support of seismic assessments for critical facilities
William S. Leith, Harley M. Benz, Robert B. Herrmann
2011, Open-File Report 2011-1101
Evaluation of seismic monitoring capabilities in the central and eastern United States for critical facilities - including nuclear powerplants - focused on specific improvements to understand better the seismic hazards in the region. The report is not an assessment of seismic safety at nuclear plants. To accomplish the evaluation and...