Documentation of data collection in Currituck Sound, North Carolina and Virginia, 2006-2007
Jason M. Fine
2008, Open-File Report 2008-1147
During 2006 and 2007, scientists from Elizabeth City State University, North Carolina Estuarine Research Reserve, the U.S. Fish and Wildlife Service, and the U.S. Geological Survey collected hydrologic and water-quality data at nine sites in and around Currituck Sound. Hydrologic and water-quality data were collected at five tributary sites--the Northwest...
Mobility statistics and automated hazard mapping for debris flows and rock avalanches
Julia P. Griswold, Richard M. Iverson
2008, Scientific Investigations Report 2007-5276
Power-law equations that are physically motivated and statistically tested and calibrated provide a basis for forecasting areas likely to be inundated by debris flows, rock avalanches, and lahars with diverse volumes. The equations A=α1V2/3 and B=α2V2/3 are based on the postulate that the maximum valley cross-sectional area (A) and total...
Catalog of Mount St. Helens 2004 - 2005 tephra samples with major- and trace-element geochemistry
Michael C. Rowe, Carl R. Thornber, Daniel J. Gooding, John S. Pallister
2008, Open-File Report 2008-1131
This open-file report presents a catalog of information about 135 ash samples along with geochemical analyses of bulk ash, glass and individual mineral grains from tephra deposited as a result of volcanic activity at Mount St. Helens, Washington, from October 1, 2004 until August 15, 2005. This data, in conjunction...
Algal and Invertebrate Community Composition along Agricultural Gradients: A Comparative Study from Two Regions of the Eastern United States
Daniel L. Calhoun, M. Brian Gregory, Holly S. Weyers
2008, Scientific Investigations Report 2008-5046
Benthic algal and invertebrate communities in two Coastal Plain regions of the Eastern United States?the Delmarva Peninsula (27 sites) and Georgia Upper Coastal Plain (29 sites)?were assessed to determine if aspects of agricultural land use and nutrient conditions (dissolved and whole-water nitrogen and phosphorus) could be linked to biological community...
Update on Regulation of Sand Transport in the Colorado River by Changes in the Surface Grain Size of Eddy Sandbars over Multiyear Timescales
David J. Topping, David M. Rubin, John C. Schmidt
2008, Scientific Investigations Report 2008-5042
In settings where the transport of sand is partially or fully supply limited, changes in the upstream supply of sand are coupled to changes in the grain size of sand on the bed. In this manner, the transport of sand under the supply-limited case is ?grain-size regulated.? Since the closure...
Assessment of Undiscovered Petroleum Resources of the North and East Margins of the Siberian Craton, Russian Federation
T. R. Klett
2008, Fact Sheet 2008-3020
Four geologic provinces located along the north and east margins of the Siberian craton were assessed for undiscovered crude oil, natural gas, and natural gas liquids/condensates resources as part of the U.S. Geological Survey's (USGS) Circum-Arctic Oil and Gas Resource Appraisal. Using a geology-based methodology, the USGS estimated the mean...
A major unconformity between Permian and Triassic strata at Cape Kekurnoi, Alaska Peninsula: Old and new observations on stratigraphy and hydrocarbon potential
Robert B. Blodgett, Bryan Sralla
2008, Professional Paper 1739-E
A major angular unconformity separates carbonates and shales of the Upper Triassic Kamishak Formation from an underlying unnamed sequence of Permian agglomerate, volcaniclastic rocks (sandstone), and limestone near Puale Bay on the Alaska Peninsula. For the first time, we photographically document the angular unconformity in outcrop, as clearly exposed in...
Bathymetric Survey and Storage Capacity of Upper Lake Mary near Flagstaff, Arizona
Nancy J. Hornewer, Marilyn E. Flynn
2008, Open-File Report 2008-1098
Upper Lake Mary is a preferred drinking-water source for the City of Flagstaff, Arizona. Therefore, storage capacity and sedimentation issues in Upper Lake Mary are of interest to the City. The U.S. Geological Survey, in cooperation with the City of Flagstaff, collected bathymetric and land-survey data in Upper Lake Mary...
Preliminary integrated geologic map databases for the United States. Digital data for the geology of the southern Brooks Range, Alaska
2008, Open-File Report 2008-1149
The growth in the use of Geographic Information Systems (GIS) has highlighted the need for digital geologic maps that have been attributed with information about age and lithology. Such maps can be conveniently used to generate derivative maps for manifold special purposes such as mineral-resource assessment, metallogenic studies, tectonic studies,...
Catalog of Mount St. Helens 2004-2007 dome samples with major- and trace-element chemistry
Carl R. Thornber, John S. Pallister, Michael C. Rowe, Siobhan McConnell, Trystan M. Herriott, Alison Eckberg, Winston C. Stokes, Diane Johnson Cornelius, Richard M. Conrey, Tammy Hannah, Joseph E. Taggart Jr., Monique Adams, Paul J. Lamothe, James R. Budahn, Charles M. Knaack
2008, Open-File Report 2008-1130
Sampling and analysis of eruptive products at Mount St. Helens is an integral part of volcano monitoring efforts conducted by the U.S. Geological Survey?s Cascades Volcano Observatory (CVO). The objective of our eruption sampling program is to enable petrological assessments of pre-eruptive magmatic conditions, critical for ascertaining mechanisms for eruption...
Pacific Walrus Response to Arctic Sea Ice Losses
Chadwick V. Jay, Anthony S. Fischbach
2008, Fact Sheet 2008-3041
Sea ice plays an important role in the life of the Pacific walrus (Odobenus rosmarus divergens). U.S. Geological Survey (USGS) scientists are seeking to understand how losses of sea ice during summer over important foraging grounds in the Chukchi Sea will affect walruses. USGS scientists recently modified a remotely deployed...
Research to More Effectively Manage Critical Ground-Water Basins
James Nickles
2008, Fact Sheet 2008-3037
As the regional management agency for two of the most heavily used ground-water basins in California, the Water Replenishment District of Southern California (WRD) plays a vital role in sheparding the water resources of southern Los Angeles County. WRD is using the results of the U.S. Geological Survey (USGS) studies...
Multi-Disciplinary Approach to Trace Contamination of Streams and Beaches
James Nickles
2008, Fact Sheet 2008-3040
Concentrations of fecal-indicator bacteria in urban streams and ocean beaches in and around Santa Barbara occasionally can exceed public-health standards for recreation. The U.S. Geological Survey (USGS), working with the City of Santa Barbara, has used multi-disciplinary science to trace the sources of the bacteria. This research is helping local...
USGS Research Helps the County of Los Angeles Address New Arsenic Standards
James Nickles
2008, Fact Sheet 2008-3043
In January 2006, the U.S. Environmental Protection Agency (USEPA) enacted stringent standards on arsenic in drinking water. The new limitsraised concerns about wells in the Antelope Valley of northern Los Angeles County that had high levels of naturally occurring arsenic. To meet the new standard, Los Angeles County Waterworks District...
Providing Data and Modeling to Help Manage Water Supplies
James Nickles
2008, Fact Sheet 2008-3038
The Sonoma County Water Agency (SCWA) and other local water purveyors have partnered with the U.S. Geological Survey (USGS) to assess hydrologic conditions and to quan-tify the county-wide interconnections between surface water and ground water. Through this partnership, USGS scientists have completed assessments of the geohydrology and geochemistry of the Sonoma...
Questa baseline and pre-mining ground-water quality investigation. 25. Summary of results and baseline and pre-mining ground-water geochemistry, Red River Valley, Taos County, New Mexico, 2001-2005
D. Kirk Nordstrom
2008, Professional Paper 1728
Active and inactive mine sites are challenging to remediate because of their complexity and scale. Regulations meant to achieve environmental restoration at mine sites are equally challenging to apply for the same reasons. The goal of environmental restoration should be to restore contaminated mine sites, as closely as possible, to...
USGS Workshop on Scientific Aspects of a Long-Term Experimental Plan for Glen Canyon Dam, April 10-11, 2007, Flagstaff, Arizona
USGS Grand Canyon Monitoring and Research Center
2008, Open-File Report 2008-1153
Executive Summary Glen Canyon Dam is located in the lower reaches of Glen Canyon National Recreation Area on the Colorado River, approximately 15 miles upriver from Grand Canyon National Park (fig. 1). In 1992, Congress passed and the President signed into law the Grand Canyon Protection Act (GCPA; title XVIII, sec....
Preliminary Map of Potentially Karstic Carbonate Rocks in the Central and Southern Appalachian States
David J. Weary
2008, Open-File Report 2008-1154
Karst is a landscape produced by dissolution of rocks and the development of integrated subterranean drainages dominated by the flow of ground water in solutionally enlarged conduits. Karst landscapes typically include cave entrances, sinkholes, blind valleys, losing streams, springs, and large and small-scale solution features on bedrock surfaces. Water-bearing rocks...
NCCN Mountain Lakes Monitoring Strategy: Guidelines to Resolution
Robert L. Hoffman, Mark H. Huff
2008, Open-File Report 2008-1145
The North Coast and Cascades Network (NCCN) Inventory and Monitoring Program provides funds to its Network Parks to plan and implement the goals and objectives of the National Park Services? (NPS) Inventory and Monitoring (I&M) Program. The primary purpose of the I&M program is to develop and implement a long-term...
Streamflow Characteristics of Streams in the Helmand Basin, Afghanistan
Tara Williams-Sether
2008, Data Series 333
Statistical summaries of streamflow data for all historical streamflow-gaging stations for the Helmand Basin upstream from the Sistan Wetlands are presented in this report. The summaries for each streamflow-gaging station include (1) manuscript (station description), (2) graph of the annual mean discharge for the period of record, (3) statistics of...
Table Mountain Shoshonite Porphyry Lava Flows and Their Vents, Golden, Colorado
Harald Drewes
2008, Scientific Investigations Report 2006-5242
During early Paleocene time shoshonite porphyry lava was extruded from several plugs about 5 km north of Golden, Colo., to form lava flows intercalated in the upper part of the Denver Formation. These flows now form the caps of North and South Table Mountains. Detailed field and petrographic studies provide...
Preliminary Image Map of the 2007 Buckweed Fire Perimeter, Warm Springs Mountain Quadrangle, Los Angeles County, California
Perry S. Clark, Wendy S. Scratch, Gaylord W. Bias, Gregory B. Stander, Jenne L. Sexton, Bridgette J. Krawczak
2008, Open-File Report 2008-1081
In the fall of 2007, wildfires burned out of control in southern California. The extent of these fires encompassed large geographic areas that included a variety of landscapes from urban to wilderness. The U.S. Geological Survey National Geospatial Technical Operations Center (NGTOC) is currently (2008) developing a quadrangle-based 1:24,000-scale image...
Preliminary Image Map of the 2007 Santiago Fire Perimeter, Tustin Quadrangle, Orange County, California
Perry S. Clark, Wendy S. Scratch, Gaylord W. Bias, Gregory B. Stander, Jenne L. Sexton, Bridgette J. Krawczak
2008, Open-File Report 2008-1077
In the fall of 2007, wildfires burned out of control in southern California. The extent of these fires encompassed large geographic areas that included a variety of landscapes from urban to wilderness. The U.S. Geological Survey National Geospatial Technical Operations Center (NGTOC) is currently (2008) developing a quadrangle-based 1:24,000-scale image...
Preliminary Image Map of the 2007 Witch Fire Perimeter, Warners Ranch Quadrangle, San Diego County, California
Perry S. Clark, Wendy S. Scratch, Gaylord W. Bias, Gregory B. Stander, Jenne L. Sexton, Bridgette J. Krawczak
2008, Open-File Report 2008-1082
In the fall of 2007, wildfires burned out of control in southern California. The extent of these fires encompassed large geographic areas that included a variety of landscapes from urban to wilderness. The U.S. Geological Survey National Geospatial Technical Operations Center (NGTOC) is currently (2008) developing a quadrangle-based 1:24,000-scale image...
Preliminary Image Map of the 2007 Witch Fire Perimeter, San Vicente Reservoir Quadrangle, San Diego County, California
Perry S. Clark, Wendy S. Scratch, Gaylord W. Bias, Gregory B. Stander, Jenne L. Sexton, Bridgette J. Krawczak
2008, Open-File Report 2008-1070
In the fall of 2007, wildfires burned out of control in southern California. The extent of these fires encompassed large geographic areas that included a variety of landscapes from urban to wilderness. The U.S. Geological Survey National Geospatial Technical Operations Center (NGTOC) is currently (2008) developing a quadrangle-based 1:24,000-scale image...
