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Page 171, results 4251 - 4275

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Not all publications have extents, not all extents are completely accurate
Collection, analysis, and age-dating of sediment cores from 56 U.S. lakes and reservoirs sampled by the U.S. Geological Survey, 1992-2001
Peter Van Metre, Jennifer T. Wilson, Christopher C. Fuller, Edward Callender, Barbara Mahler
2004, Scientific Investigations Report 2004-5184
The U.S. Geological Survey Reconstructed Trends National Synthesis study collected sediment cores from 56 lakes and reservoirs between 1992 and 2001 across the United States. Most of the sampling was conducted as part of the National Water-Quality Assessment (NAWQA) Program. The primary objective of the study was to determine trends...
Biomonitoring of Environmental Status and Trends (BEST) Program: Environmental contaminants and their effects on fish in the Yukon River Basin
Jo Ellen Hinck, Timothy M. Bartish, Vicki Blazer, Nancy D. Denslow, Tim S. Gross, Mark S. Myers, Patrick J. Anderson, Carl E. Orazio, Donald E. Tillitt
2004, Scientific Investigations Report 2004-5285
This project collected, examined, and analyzed 217 fish representing three species at 10 stations in the U.S. portion of the Yukon River Basin (YRB) from May to October 2002. Four sampling sites were located on the Yukon River; two were located on the Porcupine River, and one site was on...
Oil and gas assessment of Yukon Flats, East-Central Alaska, 2004
Richard G. Stanley, Thomas S. Ahlbrandt, Ronald R. Charpentier, Troy A. Cook, Jesse M. Crews, Timothy R. Klett, Paul G. Lillis, Robert L. Morin, Jeffrey D. Phillips, Richard M. Pollastro, Elisabeth L. Rowan, Richard W. Saltus, Christopher J. Schenk, Megan K. Simpson, Alison B. Till, Sandra M. Troutman, James W. Hendley II
2004, Fact Sheet 2004-3121
Surficial materials in the conterminous United States
David R. Soller, Marith C. Reheis
2004, Open-File Report 2003-275
Introduction: The Earth's bedrock is overlain in many places by a loosely compacted and mostly unconsolidated blanket of sediments in which soils commonly are developed. These sediments generally were eroded from underlying rock, and then were transported and deposited. In places, they exceed 1,000 ft (330 m) in thickness. Where...
1999 Volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory
Robert G. McGimsey, Christina A. Neal, Olga Girina
2004, Open-File Report 2004-1033
The Alaska Volcano Observatory (AVO) monitors 41 historically active volcanoes along the Aleutian Arc. Twenty are seismically monitored and for the rest, the AVO monitoring program relies mainly on daily analysis of satellite images, pilot reports, and observations of local residents and ship's crews. In 1999, AVO responded to eruptive...
Geologic map of the Umiat quadrangle, Alaska
Charles G. Mull, David W. Houseknecht, G. H. Pessel, Christopher P. Garrity
2004, Scientific Investigations Map 2817-A
This geologic map of the Umiat quadrangle is a compilation of previously published USGS geologic maps and unpublished mapping done for the Richfield Oil Corporation. Geologic mapping from these three primary sources was augmented with additional unpublished map data from British Petroleum Company. This report incorporates recent revisions in stratigraphic...
Evaluation of pier-scour equations for coarse-bed streams
Katherine J. Chase, Stephen R. Holnbeck
2004, Scientific Investigations Report 2004-5111
Streambed scour at bridge piers is among the leading causes of bridge failure in the United States. Several pier-scour equations have been developed to calculate potential scour depths at existing and proposed bridges. Because many pier-scour equations are based on data from laboratory flumes and from cohesionless silt- and sand-bottomed...
Water resources data, Alaska, water year 2003
D. F. Meyer, D.P. Bartu, J.D. Eash, W.A. Swenson
2004, Water Data Report AK-03-1
Water resources data for the 2003 water year for Alaska consist of records of stage, discharge, and water quality of streams; stages of lakes; and water levels and water quality of ground water. This volume contains records for water discharge at 118 gaging stations; stage or contents only at 4...
Status assessment and conservation plan for the yellow-billed loon (Gavia adamsii)
Susan L. Earnst
2004, Scientific Investigations Report 2004-5258
Because of its restricted range, small population size, specific habitat requirements, and perceived threats to its breeding habitat, the Yellow-billed Loon (Gavia adamsii) is a species of conservation concern to the U.S. Fish and Wildlife Service and the subject of a petition for listing under the Endangered Species Act. This...
Testing archival tag technology in coho salmon
Jennifer L. Nielsen, Philip Richards, Thor Tingey, Derek Wilson, Christian E. Zimmerman
2004, Report
Archive tags with temperature and light-geolocation sensors will be monitored for post-smolt coho salmon in Cook Inlet. Light/location relationships specific to the Gulf of Alaska developed under Project 00478 will be applied in this study of movement and migration paths for coho salmon during maturation in ocean environments in Cook...
Origin of the Bering Sea salient
J.M. Amato, J. Toro, Thomas E. Moore
2004, GSA Special Papers (383) 131-144
Our investigations in Alaska and Russia show that the curved orogen of the Bering Strait region is a composite feature that formed as a result of multiple superimposed events and cannot be related to latest Cretaceous–early Tertiary east-west shortening. Relations interpreted to record east-west shortening include the Chukchi syntaxis, deformation...
Using Forward Looking Infrared (FLIR) imagery to detect polar bear maternal dens: Operations manual
Geoffrey S. York, Steven C. Amstrup, Kristin S. Simac
2004, BOEM MMS 2004-062
Recent research has shown that Forward Looking Infia-Red (FLIR) imagery can detect polar bear dens despite total snow cover over their deming habitat. FLIR imagers detect a AT or difference in temperature between objects in the imager's field of view. During the Arctic winter, the groundlsnow surface is typically cold,...
Seafloor habitat mapping and classification in Glacier Bay, Alaska: Phase 1 & 2 1996-2004
Philip N. Hooge, Paul R. Carlson, Jennifer Mondragon, Lisa L. Etherington, G.R. Cochran
2004, Report
Glacier Bay is a diverse fjord ecosystem with multiple sills, numerous tidewater glaciers and a highly complex oceanographic system. The Bay was completely glaciated prior to the 1700’s and subsequently experienced the fastest glacial retreat recorded in historical times. Currently, some of the highest sedimentation rates ever observed occur in...
Mitigation of earthquake damage
George Plafker
2004, Book chapter, Meeting Challenges with Geologic Maps
The article describes the use of a geologic map to help mitigate earthquake damage along the Denali Fault where the Trans-Alaska Pipeline crosses. Geologic mapping of bedrock and unconsolidated deposits reveals a history of horizontal right-lateral slip and local vertical separations at the fault. It was determined that the eastern...
Water-quality, biological, and physical-habitat conditions at fixed sites in the Cook Inlet Basin, Alaska, National Water-Quality Assessment Study Unit, October 1998-September 2001
Timothy P. Brabets, Matthew S. Whitman
2004, Scientific Investigations Report 2004-5021
The Cook Inlet Basin study unit of the U.S. Geological Survey National Water-Quality Assessment Program comprises 39,325 square miles in south-central Alaska. Data were collected at eight fixed sites to provide baseline information in areas where no development has taken place, urbanization or logging have occurred, or the effects of...