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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Transport and deposition of asbestos-rich sediment in the Sumas River, Whatcom County, Washington Transport and deposition of asbestos-rich sediment in the Sumas River, Whatcom County, Washington
Heavy sediment loads in the Sumas River of Whatcom County, Washington, increase seasonal turbidity and cause locally acute sedimentation. Most sediment in the Sumas River is derived from a deep-seated landslide of serpentinite that is located on Sumas Mountain and drained by Swift Creek, a tributary to the Sumas River. This mafic sediment contains high amounts of naturally occurring...
Authors
Christopher A. Curran, Scott W. Anderson, Jack E. Barbash, Christopher S. Magirl, Stephen E. Cox, Katherine K. Norton, Andrew S. Gendaszek, Andrew R. Spanjer, James R. Foreman
Tsunami geology in paleoseismology Tsunami geology in paleoseismology
The 2004 Indian Ocean and 2011 Tohoku-oki disasters dramatically demonstrated the destructiveness and deadliness of tsunamis. For the assessment of future risk posed by tsunamis it is necessary to understand past tsunami events. Recent work on tsunami deposits has provided new information on paleotsunami events, including their recurrence interval and the size of the tsunamis (e.g. [187...
Authors
Yuichi Nishimura, Bruce E. Jaffe
U.S. States and Territories National Tsunami Hazard Assessment: Historical record and sources for waves – Update U.S. States and Territories National Tsunami Hazard Assessment: Historical record and sources for waves – Update
The first U.S. Tsunami Hazard Assessment (Dunbar and Weaver, 2008) was prepared at the request of the National Tsunami Hazard Mitigation Program (NTHMP). The NTHMP is a partnership formed between federal and state agencies to reduce the impact of tsunamis through hazard assessment, warning guidance, and mitigation. The assessment was conducted in response to a 2005 joint report by the...
Authors
Paula K. Dunbar, Craig S. Weaver
Uranium in the Islamic Republic of Mauritania (phase V, deliverable 81) Uranium in the Islamic Republic of Mauritania (phase V, deliverable 81)
Mauritania has 80 known uranium mineral occurrences and is the current focus of active exploration for uranium by a number of private companies. Seventeen occurrences have had resource estimates published and can be considered as mineral deposits. Fourteen of these are calcrete-type deposits with a total resource of 138.3 million tonnes at an average grade of 331 ppm U3O8. The three...
Authors
Gregory Fernette
Wyoming Basin Rapid Ecoregional Assessment Wyoming Basin Rapid Ecoregional Assessment
The Wyoming Basin Rapid Ecoregional Assessment was conducted in partnership with the Bureau of Land Management (BLM). The overall goals of the BLM Rapid Ecoregional Assessments (REAs) are to identify important ecosystems and wildlife habitats at broad spatial scales; identify where these resources are at risk from Change Agents, including development, wildfire, invasive species, disease...
Sea lamprey mark type, wounding rate, and parasite-host preference and abundance relationships for lake trout and other species in Lake Ontario Sea lamprey mark type, wounding rate, and parasite-host preference and abundance relationships for lake trout and other species in Lake Ontario
We examined how the frequency of attacks by Sea Lamprey on fishes in Lake Ontario varied in response to Sea Lamprey abundance and preferred host abundance (Lake Trout >432mm). For this analysis we assembled seven data sets. Two fishery independent surveys for Lake Trout: US Geological Survey (USGS)/New York State Department of Environmental Conservation (NYSDEC) south shore September...
Authors
Brian F. Lantry, Jean Adams, Gavin Christie, Teodore Schaner, James Bowlby, Michael Keir, Jana Lantry, Paul Sullivan, Daniel Bishop, Ted Treska, Bruce Morrison
The critical role of islands for waterbird breeding and foraging habitat in managed ponds of the South Bay Salt Pond Restoration Project, South San Francisco Bay, California The critical role of islands for waterbird breeding and foraging habitat in managed ponds of the South Bay Salt Pond Restoration Project, South San Francisco Bay, California
The South Bay Salt Pond Restoration Project aims to restore 50–90 percent of former salt evaporation ponds into tidal marsh in South San Francisco Bay, California. However, large numbers of waterbirds use these ponds annually as nesting and foraging habitat. Islands within ponds are particularly important habitat for nesting, foraging, and roosting waterbirds. To maintain current...
Authors
Joshua T. Ackerman, C. Alex Hartman, Mark P. Herzog, Lacy M. Smith, Stacy M. Moskal, Susan E.W. De La Cruz, Julie L. Yee, John Y. Takekawa
Yellowstone River Compact Commission sixty-third annual report, 2014 Yellowstone River Compact Commission sixty-third annual report, 2014
No abstract available.
Authors
Wayne R. Berkas
Land-use and land-cover change Land-use and land-cover change
No abstract available.
Authors
Daniel G. Brown, Colin Polsky, Paul V. Bolstad, Samuel D. Brody, David Hulse, Roger Kroh, Thomas Loveland, Allison Thompson
An updated conceptual model of Delta Smelt biology: Our evolving understanding of an estuarine fish An updated conceptual model of Delta Smelt biology: Our evolving understanding of an estuarine fish
The main purpose of this report is to provide an up-to-date assessment and conceptual model of factors affecting Delta Smelt (Hypomesus transpacificus) throughout its primarily annual life cycle and to demonstrate how this conceptual model can be used for scientific and management purposes. The Delta Smelt is a small estuarine fish that only occurs in the San Francisco Estuary. Once...
Authors
Randy Baxter, Larry R. Brown, Gonzalo Castillo, Louise Conrad, Steven D. Culberson, Matthew P. Dekar, Melissa Dekar, Frederick Feyrer, Thaddeus Hunt, Kristopher Jones, Joseph Kirsch, Anke Mueller-Solger, Matthew Nobriga, Steven B. Slater, Ted Sommer, Kelly Souza, Gregg Erickson, Stephanie Fong, Karen Gehrts, Lenny Grimaldo, Bruce Herbold
Comparison of fishes in nearshore areas of the St. Lawrence River, New York over 35 years Comparison of fishes in nearshore areas of the St. Lawrence River, New York over 35 years
Fishes of the nearshore waters of the St. Lawrence River provide forage for valuable sport fisheries and are important biological indicators of condition and change. This fish community differs slightly among various reaches of the St. Lawrence River from New York to Quebec (Carlson et al. 2006, Eckert and Hanlon 1977, Kapuscinski 2011, LaViolette et al. 2003, Mandrak et al. 2006...
Authors
Douglas M. Carlson, James E. McKenna
From icefield to ocean - Explore the many ways that glaciers influence Alaska's Coastal Ecosystems. From icefield to ocean - Explore the many ways that glaciers influence Alaska's Coastal Ecosystems.
No abstract available.
Authors
Shad O’Neel, Eran Hood, Kristin Timm