Eutrophication of freshwater and marine ecosystems
Val H. Smith, Samantha B. Joye, Robert W. Howarth
2006, Limnology and Oceanography (51) 351-355
Initial understanding of the links between nutrients and aquatic productivity originated in Europe in the early 1900s, and our knowledge base has expanded greatly during the past 40 yr. This explosion of eutrophication-related research has made it unequivocally clear that a comprehensive strategy to prevent excessive amounts of nitrogen and...
Environmental effects of historical mining in the Boulder River watershed, southwestern Montana
David Nimick
2006, Fact Sheet 2005-3148
The U.S. Geological Survey recently completed an environmental study of historical mining in the Boulder River watershed, Montana, using the watershed approach. Results of the study have been used by State and Federal agencies to plan and implement cleanup. The watershed approach is based on the premise that contaminated sites...
Biomechanics and fisheries conservation
Theodore R. Castro-Santos, Alexander Haro
Robert Shadwick, George Lauder, editor(s)
2006, Book chapter, Fish physiology: Fish biomechanics
No abstract available....
A data viewer for stream-sediment and surface-water chemistry, geology, and geography of the Humboldt River basin, northern Nevada
Douglas B. Yager, Helen W. Folger, Lisa L. Stillings
2006, Bulletin 2210-F
The data and software utilized in this product permit the user to view and analyze the geographic relationships among chemistry of stream sediments and surface waters, geology, and various cartographic base information such as but not limited to cities, county boundaries, and land ownership. Data for this product were compiled...
Geochemical database for volcanic rocks of the western Cascades, Washington, Oregon, and California
Edward A. du Bray, David A. John, David R. Sherrod, Russell C. Evarts, Richard M. Conrey, Jaroslav Lexa
2006, Data Series 155
Response to comment on “Persistence of pharmaceutical compounds and other organic wastewater contaminants in a conventional drinking-water-treatment plant”
Paul E. Stackelberg, Edward T. Furlong, Michael T. Meyer, Steven D. Zaugg, Alden K. Henderson, Dori B. Reissman
2006, Science of the Total Environment (354) 93-97
The U.S. Geological Survey (USGS) and the Centers for Disease Control thank Dr. Till for her comments concerning our research (Till, 2005) and welcome the opportunity to respond. The primary objective of our study was to evaluate the potential for organic wastewater-related contaminants (OWCs), including pharmaceuticals, to survive a...
An overview of the global variability in radiated energy and apparent stress
George Choy, Arthur F. McGarr, Stephen H. Kirby, John Boatwright
2006, Book chapter, Earthquakes: Radiated energy and the physics of faulting, volume 170
a global study of radiated seismic energies ER and apparent stresses τ a reveals systematic patterns. earthquakes with the highest apparent stress occur in regions of intense deformation and rupture strong lithosphere. in oceanic settings, these are strike-slip earthquakes (τ a up to 27 Mpa) occurring intraplate or at evolving...
Remote sensing methods for mapping the onset and progression of spartina alterniflora marsh dieback in coastal Louisiana
Amina Rangoonwala, Elijah Ramsey III, Gene Nelson
2006, Conference Paper, 2005 International workshop on the analysis of multi-temporal remote sensing images
No abstract available....
Hurricane-induced landslide activity on an alluvial fan along Meadow Run, Shenandoah Valley, Virginia (eastern USA)
Gerald F. Wieczorek, L. Scott Eaton, Thomas M. Yanosky, Eric Turner
2006, Landslides (3) 95-106
Although intense rainfall and localized flooding occurred as Hurricane Isabel tracked inland northwestardly across the Blue Ridge Mountains of central Virginia on September 18–19, 2003, few landslides occurred. However, the hurricane reactivated a dormant landslide along a bluff of an incised alluvial fan along Meadow Run on the western flanks...
Changes in the C storage in Las Tablas de Daimiel National Park (PNTD) in the last 1000 years [Cambios en el almacenamiento de C en el Parque Nacional de Las Tablas de Daimiel (PNTD) en los últimos 1000 años]
F. Dominguez-Castro, J.I. Santisteban, R. Mediavilla, Walter E. Dean, Enrique Lopez-Pamo, Maria Blanca Ruiz-Zapata, Maria Jose Gil-Garcia
2006, Boletin Geologico y Minero (117) 537-544
Las Tablas de Daimiel National Park has suffered too many modifications throughout its history, natural as well as anthropic, which have affected the carbon storage in different ways. The study of those variations has been carried out by the analysis of sedimentary record and historical data. The sedimentary record has...
Drainage areas for selected stream-sampling stations, Missouri River Basin
2006, Data Series NE-3071
As part of the U.S. Geological Survey's (USGS) National Water-Quality Assessment Program (NAWQA), an investigation of the Missouri River Basin is being conducted to document trends in surface-water quality, specifically for trends in nutrients and suspended sediment. Surface-water samples were collected from streams at specific sampling stations. Water-quality...
The toxicological geochemistry of Earth materials: An overview of processes and the interdisciplinary methods used to understand them
Geoffrey S. Plumlee, Suzette A. Morman, Thomas L. Ziegler
2006, Reviews in Mineralogy and Geochemistry (64) 5-57
A broad spectrum of earth materials have been linked to, blamed for, and/or debated as sources for disease. In some cases, the links are clear. For example, excessive exposures to mineral dusts have long been recognized for their role in diseases such as: asbestosis, mesothelioma, and lung cancers (asbestos); silicosis...
The significance of ground water to the accumulation of iron and manganese in the sediments of two hydrologically distinct lakes in north‐central Minnesota: A geological perspective
Walter E. Dean, Brian Neff, Donald O. Rosenberry, Thomas C. Winter, Renee S. Parkhurst
2006, Ground Water (41) 951-963
Williams and Shingobee lakes are at opposite ends of the local ground water flow system in the Shingobee River Headwaters Area (SRHA) in north‐central Minnesota. Williams Lake, situated near the highest point in the flow system, has no surface inlet or outlet, and ground water and precipitation are the only...
A continuous 250,000 yr record of oxygen and carbon isotopes in ostracode and bulk-sediment carbonate from Bear Lake, Utah-Idaho
Jordon Bright, Darrell Kaufman, Richard Forester, Walter E. Dean
2006, Quaternary Science Reviews (25) 2258-2270
Oxygen and carbon isotopes from a continuous, 120-m-long, carbonate-rich core from Bear Lake, Utah-Idaho, document dramatic fluctuations in the hydrologic budget of the lake over the last 250,000 yr. Isotopic analyses of bulk sediment samples capture millennial-scale variability. Ostracode calcite was analyzed from 78...
The geochemical record of the last 17,000 years in the Guaymas Basin, Gulf of California
Walter E. Dean
2006, Chemical Geology (232) 87-98
Sediments deposited on the western slope of the Guaymas Basin in the central Gulf of California are composed predominantly of detrital clastic material and biogenic silica (biopal), with minor organic material (average of 2.8% organic carbon) and calcium carbonate. The CaCO3 is derived from calcareous plankton and is highly variable ranging...
Geology of Delaware Water Gap National Recreation Area, New Jersey-Pennsylvania
Jack B. Epstein
2006, GSA Field Guides (8) 47-63
Many of the parks within the National Park System owe their uniqueness to their geologic framework. Their scenery is the result of diverse natural processes acting upon a variety of rocks that were deposited in varied environments in the geologic past. The Delaware Water Gap National Recreation Area (DEWA) contains...
Introduction to ‘Antarctic climate evolution: View from the margin’
Peter J. Barrett, F. Florindo, Alan K. Cooper
2006, Palaeogeography, Palaeoclimatology, Palaeoecology (231) 1-8
This special issue on “Antarctic Climate Evolution—view from the margin” presents results from modelling studies and reports on geoscience data aimed at improving our understanding of the behaviour of the Antarctic ice sheet and the climate of the region. This research field is of interest because of the sensitivity of...
King of the 40th parallel - Discovery in the American West
James G. Moore
2006, Book
This book recounts the life and achievements of Clarence King, widely recognized as one of America’s most gifted intellectuals of the nineteenth century, and a legendary figure in the American West. King’s genius, singular accomplishments, and near-death adventures unfold in a narrative centered on his personal relationship with his lifelong...
Paleozoic tectonic and metallogenetic evolution of pericratonic terranes in Yukon, northern British Columbia and eastern Alaska
JoAnne L. Nelson, Maurice Colpron, Stephen Piercey, Cynthia Dusel-Bacon, Donald Murphy, Charlie Roots
2006, Special Paper - Geological Association of Canada (45) 323-360
No abstract available....
Paleozoic magmatism and crustal recycling along the ancient Pacific margin of North America, northern Cordillera
Stephen Piercey, JoAnne L. Nelson, Maurice Colpron, Cynthia Dusel-Bacon, Renee-Luce Simard, Charlie Roots
2006, Special Paper - Geological Association of Canada (45) 281-322
No abstract available....
Lead isotopic constraints on the metallogeny of middle and late Paleozoic syngenetic base metal occurrences in the Yukon-Tanana and Slide Mountain/Seventymile Terranes and adjacent portions of the North American miogeocline
J.K. Mortensen, Cynthia Dusel-Bacon, J. Hunt, J. Gabites
2006, Special Paper - Geological Association of Canada (45) 261-280
No abstract available....
Paleozoic tectonic and metallogenic evolution of the pericratonic rocks of east-central Alaska and adjacent Yukon Territory
JoAnne L. Nelson, Maurice Colpron, Stephen Piercey, Cynthia Dusel-Bacon, Donald Murphy, Charlie Roots
2006, Special Paper - Geological Association of Canada (45) 25-74
No abstract available....
North corridor Silurian-Devonian aquifer study frequently asked questions
2006, Report
No abstract available....
Research plan and preliminary results: A field research site for emerging contaminants in Iowa
Douglas J. Schnoebelen, Dana W. Kolpin, Larry B. Barber, Edward T. Furlong, Michael Meyer, M. Skopec
2006, Journal of the Iowa Academy of Science (113) 1-9
Research has recently documented the prevalence of a wide variety of pharmaceuticals and other emerging contaminants (ECs) in streams across the United States. Wastewater treatment plants (WWTPs) have been found to be an important source and collection point of ECs to streams as many ECs are incompletely removed during treatment....
Fulfilling a paradoxical mandate: can the Environmental Water Account ensure the reliability of freshwater exports from the Sacramento-San Joaquin Delta and simultaneously protect delta smelt (Hypomesus transpacificus) from excessive entrainment?
Zach Hymanson, Larry R. Brown
2006, Interagency Ecological Program Newsletter (19) 28-49
The San Francisco Estuary (SFE) is often defined by its extremes. It is considered one of the most urbanized estuaries in the world (Conomos 1979, Nichols et al. 1986), and one of the most invaded estuaries in the United States, with hundreds of aquatic nonindigenous species established throughout the system...
