Summary of Survival Data from Juvenile Coho Salmon in the Klamath River, Northern California, 2006
John W. Beeman
2007, Open-File Report 2007-1023
Little is known about the survival of ESA-listed juvenile coho salmon during their seaward migration in the lower Klamath River. In 2006, the Bureau of Reclamation funded a study to estimate the survival of radio-tagged juvenile coho salmon in the Klamath River downstream of Iron Gate Dam. A series of...
3D Visualization of Earthquake Focal Mechanisms Using ArcScene
Keith A. Labay, Peter J. Haeussler
2007, Data Series 241
We created a new tool, 3D Focal Mechanisms (3DFM), for viewing earthquake focal mechanism symbols three dimensionally. This tool operates within the Environmental Systems Research Institute (ESRI®) GIS software ArcScene® 9.x. The program requires as input a GIS point dataset of earthquake locations containing strike, dip, and rake values for...
Regional Water-Resources Studies in Nevada
Eva M. Bauer, Shannon C. Watermolen
2007, Fact Sheet 2007-3006
Introduction: Water-resources information for the State of Nevada should be readily accessible to community planners and the general public in a user-friendly web environment and should be actively managed and maintained with accurate historic and current hydrologic data. The USGS, in cooperation with State of Nevada and local government agencies,...
Zircon U-Pb Ages from an Ultra-High Temperature Metapelite, Rauer Group, East Antarctica: Implications for Overprints by Grenvillian and Pan-African Events
Yanbin Wang, Laixi Tong, Dunyi Liu
2007, Open-File Report 2007-1047-SRP-023
SHRIMP U-Pb dating of zircon from an ultra-high temperature (UHT, ~1000 °C) granulite-facies metapelite from the Rauer Group, Mather Peninsula, east Antarctica, has yielded evidence for two episodes of metamorphic zircon growth, at ~1.00 Ga and ~530 Ma, and two episodes of magmatism in the source region for the protolith...
U.S. Geological Survey Georgia Water Science Center and City of Brunswick–Glynn County Cooperative Water Program— Summary of activities, July 2005 through June 2006
Gregory S. Cherry
2007, Open-File Report 2006-1368
Since 1959, the U.S. Geological Survey has conducted a cooperative water resources program (CWP) with the City of Brunswick and Glynn County in the Brunswick, Georgia, area. Since the late 1950s, the salinity of ground water in the Upper Floridan aquifer near downtown Brunswick, Georgia, has been increasing, and its...
Geostatistical Modeling of Sediment Abundance in a Heterogeneous Basalt Aquifer at the Idaho National Laboratory, Idaho
John A. Welhan, Renee L. Farabaugh, Melissa J. Merrick, Steven R. Anderson
2007, Scientific Investigations Report 2006-5316
The spatial distribution of sediment in the eastern Snake River Plain aquifer was evaluated and modeled to improve the parameterization of hydraulic conductivity (K) for a subregional-scale ground-water flow model being developed by the U.S. Geological Survey. The aquifer is hosted within a layered series of permeable basalts within which...
First Record of Corisella inscripta (Uhler) (Heteroptera: Corixidae) from North Dakota
Bruce A. Hanson, David M. Mushet, Ned Euliss, Stephen W. Chordas III
2007, Prairie Naturalist (39) 107-110
Corisella inscripta is a water boatman species that was reported in H. B. Hungerford's (1948) seminal monograph as occurring throughout Mexico and nine western states of the United States. Subsequently, additional records of C. inscripta have been reported for British Columbia in Canada (Maw et al. 2000) and for Montana (Roemhild 1976), Arkansas...
Relatively simple through-going fault planes at large-earthquake depth may be concealed by the surface complexity of strike-slip faults
Russell W. Graymer, Victoria E. Langenheim, Robert W. Simpson, Robert C. Jachens, David A. Ponce
2007, Geological Society, London, Special Publications (290) 189-201
At the surface, strike-slip fault stepovers, including abrupt fault bends, are typically regions of complex, often disconnected faults. This complexity has traditionally led geologists studying the hazard of active faults to consider such stepovers as important fault segment boundaries, and to give lower weight to earthquake scenarios that involve rupture...
Type region of the Ione Formation (Eocene), central California: Stratigraphy, paleogeography, and relation to auriferous gravels
Scott Creely, Eric R. Force
2007, Open-File Report 2006-1378
The middle Eocene Ione Formation extends over 200 miles (320 km) along the western edge of the Sierra Nevada. Our study was concentrated in the type region, 30 miles (48 km) along strike. There a bedrock ridge forms the seaward western side of the Ione depositional tract, defining a subbasin...
New Rb-Sr mineral ages temporally link plume events with accretion at the margin of Gondwana
M.J. Flowerdew, J.S. Daly, T.R. Riley
2007, Open-File Report 2007-1047-SRP-012
Five of six Rb-Sr muscovite mineral isochron ages from the Scotia Metamorphic Complex of the South Orkney Islands, West Antarctica, average 190 ± 4 Ma. The muscovite ages are interpreted to date foliation-formation and thus also accretion and subduction at the Gondwana margin. Coincident picrite and ferropicrite magmatism, indicative of...
Major, trace element and stable isotope geochemistry of synorogenic breccia bodies, Ellsworth Mountains, Antarctica
J.P. Craddock, M.S. McGillion, G.F. Webers
2007, Open-File Report 2007-1047-SRP-078
Cambrian carbonates in the Heritage Range of the Ellsworth Mountains, West Antarctica host a series of carbonate-rich breccia bodies that formed contemporaneously with the Permian Gondwanide orogen. The breccia bodies had a three-stage genesis, with the older breccias containing Cambrian limestone (and marble) clasts supported by calcite, whereas the younger...
Synthetic seismograms and spectral cycles on the Andvord and Schollaert Drifts: Antarctic Peninsula
P.L. Manley, S. Brachfeld
2007, Open-File Report 2007-1047-SRP-018
The geological significance of seismic reflectors within large sediment deposits of the Gerlache Strait (Schollaert Drift) and the mouth of Andvord Bay (Andvord Drift) has been examined using synthetic seismograms. The seismograms generated from the physical properties in jumbo piston cores taken at each of these drifts (28JPC and 18JPC respectively)...
Holocene oceanographic and climatic variability of the Vega Drift deduced through foraminiferal interpretation
Phillip Szymcek, Scott E. Ishman, Eugene W. Domack, Amy Leventer
2007, Open-File Report 2007-1047-SRP-010
A sediment sequence recovered from the Vega Drift, Antarctica was analyzed for benthic foraminifera to determine Holocene oceanographic and climatic variability of the northern Antarctic Peninsula margin. Core NBP0003-JPC38, collected during cruise 00-03 of the R.V. Nathaniel B. Palmer recovered 20.53 meters of Holocene glacio-marine sediments. Samples were collected every...
The Cosmonaut Sea Wedge
K. Solli, B. Kuvaas, Y. Kristoffersen, G. Leitchenkov, J. Guseva, V. Gandyukhin
2007, Open-File Report 2007-1047-SRP-009
A set of multi-channel seismic profiles (~15000 km) acquired by Russia, Norway and Australia has been used to investigate the depositional evolution of the Cosmonaut Sea margin of East Antarctica. We recognize a regional sediment wedge below the upper part of the continental rise. The wedge, herein termed the Cosmonaut...
Sm-Nd and U-Pb isotopic constraints for crustal evolution during Late Neoproterozic from rocks of the Schirmacher Oasis, East Antarctica: geodynamic development coeval with the East African Orogeny
V. Ravikant, J.H. Laux, M.M. Pimentel
2007, Open-File Report 2007-1047-SRP-007
Recent post-750 Ma continental reconstructions constrain models for East African Orogeny formation and also the scattered remnants of ~640 Ma granulites, whose genesis is controversial. One such Neoproterozoic granulite belt is the Schirmacher Oasis in East Antarctica, isolated from the distinctly younger Pan-African orogen to the south in the central...
Landscape evolution of Antarctica
S.S.R. Jamieson, D.E. Sugden
2007, Open-File Report 2007-1047-KP-05
The relative roles of fluvial versus glacial processes in shaping the landscape of Antarctica have been debated since the expeditions of Robert Scott and Ernest Shackleton in the early years of the 20th century. Here we build a synthesis of Antarctic landscape evolution based on the geomorphology of passive continental...
From buttes to bowls: Repeated relief inversion in the landscape of the Colorado Piedmont
M.L. Morgan, Vincent Matthews, F. Gutierrez, J.P. Thorson, Richard F. Madole, P.R. Hanson
2007, GSA Field Guides (10) 203-215
Mesas and buttes of the central Colorado Piedmont are composed of at least two distinct rock types, which differ in their cohesiveness and resistance to erosion. The lower parts of the exposed stratigraphic section are poorly cemented, Upper Cretaceous to Middle Eocene sandstones of the Dawson Formation. The caprocks are...
Surface-exposure ages of Front Range moraines that may have formed during the Younger Dryas, 8.2 cal ka, and Little Ice Age events
Larry Benson, Richard F. Madole, P. Kubik, Richard R. McDonald
2007, Quaternary Science Reviews (26) 1638-1649
Surface-exposure (10Be) ages have been obtained on boulders from three post-Pinedale end-moraine complexes in the Front Range, Colorado. Boulder rounding appears related to the cirque-to-moraine transport distance at each site with subrounded boulders being typical of the 2-km-long Chicago Lakes...
Geologic Characterization of Young Alluvial Basin-Fill Deposits from Drill Hole Data in Yucca Flat, Nye County, Nevada
Donald S. Sweetkind, Ronald M. Drake II
2007, Open-File Report 2006-1390
Yucca Flat is a topographic and structural basin in the northeastern part of the Nevada Test Site (NTS) in Nye County, Nevada, that has been the site of numerous underground nuclear tests; many of these tests occurred within the young alluvial basin-fill deposits. The migration of radionuclides to the Paleozoic...
Protegiendo a su familia de los terremotos-Los siete pasos a la seguridad para prepararse en caso de un terremoto (en espa?ol y en ingles)
Asian Pacific Fund California Earthquake Authority Desarrollado por American Red Cross California Earthquake Authority, Governor's Office of Emergency Services, New America Media, U.S. Department of Homeland Security Federal Emergency Management Agency, and U.S. Geological Survey
2007, General Information Product 41
Les escribimos esta carta para comunicarle un mensaje sumamente importante sobre las preparaciones de emergencia. Historicamente, hemos sufrido terremotos aqui en el Area de la Bahia de San Francisco que han causado graves privaciones para los residentes de la comunidad y da?os increibles a nuestras ciudades. Es probable que suframos...
Protecting your family from earthquakes: The seven steps to earthquake safety
American Red Cross, Asian Pacific Fund, California Earthquake Authority, Governor’s Office of Emergency Services, New America Media, U.S. Department of Homeland Security Federal Emergency Management Agency, U.S. Geological Survey
2007, General Information Product 42
This book is provided here because of the importance of preparing for earthquakes before they happen. Experts say it is very likely there will be a damaging San Francisco Bay Area earthquake in the next 30 years and that it will strike without warning. It may be hard to find...
Harmful algal blooms
Jennifer L. Graham
2007, Fact Sheet 2006-3147
What are Harmful Algal Blooms (HABs)? Freshwater and marine harmful algal blooms (HABs) can occur anytime water use is impaired due to excessive accumulations of algae. HAB occurrence is affected by a complex set of physical, chemical, biological, hydrological, and meteorological conditions making it difficult to isolate specific causative environmental factors....
Protecting Your Family From Earthquakes-The Seven Steps to Earthquake Safety (in Spanish and English)
American Red Cross, Asian Pacific Fund, California Earthquake Authority, Governor’s Office of Emergency Services, New America Media, U.S. Department of Homeland Security Federal Emergency Management Agency, Water Resources Division, U.S. Geological Survey
2007, General Information Product 41
This book is provided here to share an important message on emergency preparedness. Historically, we have suffered earthquakes here in the San Francisco Bay Area that have caused severe hardship for residents and incredible damage to our cities. It is likely we will experience a severe earthquake within the next...
Lithospheric structure across the Transantarctic Mountains constrained by an analysis of gravity and thermal structure
Audrey D. Huerta
2007, Open-File Report 2007-1047-SRP-022
The Transantarctic Mountains demarcate the boundary between the highly extended lithosphere of the West Antarctic Rift System and the Proterozoic East Antarctic Craton. Although the last stage of relief development was in the Eocene, the TAM retain peak elevations in excess of 4500 m. This combination of old age and high relief...
Nutrient and Suspended-Sediment Trends in the Missouri River Basin, 1993-2003
Lori A. Sprague, Melanie L. Clark, David L. Rus, Ronald B. Zelt, Jennifer L. Flynn, Jerri V. Davis
2007, Scientific Investigations Report 2006-5231
Trends in streamflow and concentration of total nitrogen, nitrite plus nitrate, ammonia, total phosphorus, orthophosphorus, and suspended sediment were determined for the period from 1993 to 2003 at selected stream sites in the Missouri River Basin. Flow-adjusted trends in concentration (the trends that would have occurred in the absence of...
