Chemical controls on fault behavior: weakening of serpentinite sheared against quartz-bearing rocks and its significance for fault creep in the San Andreas system
Diane E. Moore, David A. Lockner
2013, Journal of Geophysical Research B: Solid Earth (118) 2558-2570
The serpentinized ultramafic rocks found in many plate-tectonic settings commonly are juxtaposed against crustal rocks along faults, and the chemical contrast between the rock types potentially could influence the mechanical behavior of such faults. To investigate this possibility, we conducted triaxial experiments under hydrothermal conditions (200-350°C), shearing serpentinite gouge...
Investigations of groundwater system and simulation of regional groundwater flow for North Penn Area 7 Superfund site, Montgomery County, Pennsylvania
Lisa A. Senior, Daniel J. Goode
2013, Scientific Investigations Report 2013-5045
Groundwater in the vicinity of several industrial facilities in Upper Gwynedd Township and vicinity, Montgomery County, in southeast Pennsylvania has been shown to be contaminated with volatile organic compounds (VOCs), the most common of which is the solvent trichloroethylene (TCE). The 2-square-mile area was placed on the National Priorities List...
Reevaluation of the Piermont-Frontenac allochthon in the Upper Connecticut Valley: Restoration of a coherent Boundary Mountains–Bronson Hill stratigraphic sequence
Douglas W. Rankin, Robert D. Tucker, Yuri Amelin
2013, Geological Society of America Bulletin (125) 998-1024
The regional extent and mode and time of emplacement of the Piermont-Frontenac allochthon in the Boundary Mountains–Bronson Hill anticlinorium of the Upper Connecticut Valley, New Hampshire–Vermont, are controversial. Moench and coworkers beginning in the 1980s proposed that much of the autochthonous pre–Middle Ordovician section of the anticlinorium was a large...
Local-area-enhanced, 2.5-meter resolution natural-color and color-infrared satellite-image mosaics of the Ahankashan mineral district in Afghanistan
Philip A. Davis
Philip A. Davis, editor(s)
2013, Data Series 709-Y
The U.S. Geological Survey (USGS), in cooperation with the U.S. Department of Defense Task Force for Business and Stability Operations, prepared databases for mineral-resource target areas in Afghanistan. The purpose of the databases is to (1) provide useful data to ground-survey crews for use in performing detailed assessments of the...
Short-term variability of 7Be atmospheric deposition and watershed response in a Pacific coastal stream, Monterey Bay, California, USA
Christopher H. Conaway, Curt D. Storlazzi, Amy E. Draut, Peter W. Swarzenski
2013, Journal of Environmental Radioactivity (120) 94-103
Beryllium-7 is a powerful and commonly used tracer for environmental processes such as watershed sediment provenance, soil erosion, fluvial and nearshore sediment cycling, and atmospheric fallout. However, few studies have quantified temporal or spatial variability of 7Be accumulation from atmospheric fallout, and parameters that would better define the uses and...
Local-area-enhanced, 2.5-meter resolution natural-color and color-infrared satellite-image mosaics of the North Bamyan mineral district in Afghanistan
Philip A. Davis
Philip A. Davis, editor(s)
2013, Data Series 709-BB
The U.S. Geological Survey (USGS), in cooperation with the U.S. Department of Defense Task Force for Business and Stability Operations, prepared databases for mineral-resource target areas in Afghanistan. The purpose of the databases is to (1) provide useful data to ground-survey crews for use in performing detailed assessments of the...
Local-area-enhanced, 2.5-meter resolution natural-color and color-infrared satellite-image mosaics of the South Bamyan mineral district in Afghanistan
Philip A. Davis
Philip A. Davis, editor(s)
2013, Data Series 709-AA
The U.S. Geological Survey (USGS), in cooperation with the U.S. Department of Defense Task Force for Business and Stability Operations, prepared databases for mineral-resource target areas in Afghanistan. The purpose of the databases is to (1) provide useful data to ground-survey crews for use in performing detailed assessments of the...
Estimated rates of groundwater recharge to the Chicot, Evangeline and Jasper aquifers by using environmental tracers in Montgomery and adjacent counties, Texas, 2008 and 2011
Timothy D. Oden, Margot Truini
2013, Scientific Investigations Report 2013-5024
Montgomery County is in the northern part of the Houston, Texas, metropolitan area, the fourth most populous metropolitan area in the United States. As populations have increased since the 1980s, groundwater has become an important resource for public-water supply and industry in the rapidly growing area of Montgomery County. Groundwater...
Method- and species-specific detection probabilities of fish occupancy in Arctic lakes: Implications for design and management
Trevor B. Haynes, Amanda E. Rosenberger, Mark S. Lindberg, Matthew Whitman, Joel A. Schmutz
2013, Canadian Journal of Fisheries and Aquatic Sciences (70) 1055-1062
Studies examining species occurrence often fail to account for false absences in field sampling. We investigate detection probabilities of five gear types for six fish species in a sample of lakes on the North Slope, Alaska. We used an occupancy modeling approach to provide estimates of detection probabilities for each...
A novel approach to surveying sturgeon using side-scan sonar and occupancy modeling
H. Jared Flowers, Joseph E. Hightower
2013, Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science (5) 211-223
Technological advances represent opportunities to enhance and supplement traditional fisheries sampling approaches. One example with growing importance for fisheries research is hydroacoustic technologies such as side-scan sonar. Advantages of side-scan sonar over traditional techniques include the ability to sample large areas efficiently and the potential to survey fish without physical...
Colloid transport in saturated porous media: Elimination of attachment efficiency in a new colloid transport model
Lee L. Landkamer, Ronald W. Harvey, Timothy D. Scheibe, Joseph N. Ryan
2013, Water Resources Research (49) 2952-2965
A colloid transport model is introduced that is conceptually simple yet captures the essential features of colloid transport and retention in saturated porous media when colloid retention is dominated by the secondary minimum because an electrostatic barrier inhibits substantial deposition in the primary minimum. This model is based on conventional...
Assessing the potential of reservoir outflow management to reduce sedimentation using continuous turbidity monitoring and reservoir modelling
Casey J. Lee, Guy M. Foster
2013, Hydrological Processes (27) 1426-1439
In-stream sensors are increasingly deployed as part of ambient water quality-monitoring networks. Temporally dense data from these networks can be used to better understand the transport of constituents through streams, lakes or reservoirs. Data from existing, continuously recording in-stream flow and water quality monitoring stations were coupled with the two-dimensional...
Annual modulation of non-volcanic tremor in northern Cascadia
Frederick Pollitz, Aaron G. Wech, Honn Kao, Roland Burgmann
2013, Journal of Geophysical Research B: Solid Earth (118) 2445-2459
Two catalogs of episodic tremor events in northern Cascadia, one from 2006 to 2012 and the other from 1997 to 2011, reveal two systematic patterns of tremor occurrence in southern Vancouver Island: (1) most individual events tend to occur in the third quarter of the year; (2) the number of...
Rupture history of the 2011 M 9 Tohoku Japan earthquake determined from strong‐motion and high‐rate GPS recordings: Subevents radiating energy in different frequency bands
Arthur D. Frankel
2013, Bulletin of the Seismological Society of America (103) 1290-1306
Strong‐motion records from KiK‐net and K‐NET, along with 1 sample/s Global Positioning System (GPS) records from GEONET, were analyzed to determine the location, timing, and slip of subevents of the M 9 2011 Tohoku earthquake. Timing of arrivals on stations along the coast shows that the first subevent was located closer to the...
Incorporating harvest rates into the sex-age-kill model for white-tailed deer
Andrew S. Norton, Duane R. Diefenbach, Christopher S. Rosenberry, Bret D. Wallingford
2013, Journal of Wildlife Management (77) 606-615
Although monitoring population trends is an essential component of game species management, wildlife managers rarely have complete counts of abundance. Often, they rely on population models to monitor population trends. As imperfect representations of real-world populations, models must be rigorously evaluated to be applied appropriately. Previous research has evaluated population...
To stock or not to stock? Assessing restoration potential of a remnant American shad spawning run with hatchery supplementation
Michael M. Bailey, Joseph D. Zydlewski
2013, North American Journal of Fisheries Management (33) 459-467
Hatchery supplementation has been widely used as a restoration technique for American Shad Alosa sapidissima on the East Coast of the USA, but results have been equivocal. In the Penobscot River, Maine, dam removals and other improvements to fish passage will likely reestablish access to the majority of this species’ historic spawning...
Simulation of groundwater flow, effects of artificial recharge, and storage volume changes in the Equus Beds aquifer near the city of Wichita, Kansas well field, 1935–2008
Brian P. Kelly, Linda L. Pickett, Cristi V. Hansen, Andrew C. Ziegler
2013, Scientific Investigations Report 2013-5042
The Equus Beds aquifer is a primary water-supply source for Wichita, Kansas and the surrounding area because of shallow depth to water, large saturated thickness, and generally good water quality. Substantial water-level declines in the Equus Beds aquifer have resulted from pumping groundwater for agricultural and municipal needs, as well...
Estimates of future inundation of salt marshes in response to sea-level rise in and around Acadia National Park, Maine
Martha G. Nielsen, Robert W. Dudley
2013, Scientific Investigations Report 2012-5290
Salt marshes are ecosystems that provide many important ecological functions in the Gulf of Maine. The U.S. Geological Survey investigated salt marshes in and around Acadia National Park from Penobscot Bay to the Schoodic Peninsula to map the potential for landward migration of marshes using a static inundation model of...
Mount St. Helens, 1980 to now—what’s going on?
Daniel Dzurisin, Carolyn L. Driedger, Lisa M. Faust
2013, Fact Sheet 2013-3014, version 1.1
Mount St. Helens seized the world’s attention in 1980 when the largest historical landslide on Earth and a powerful explosive eruption reshaped the volcano, created its distinctive crater, and dramatically modified the surrounding landscape. An enormous lava dome grew episodically in the crater until 1986, when the volcano became relatively...
Salmonids, stream temperatures, and solar loading--modeling the shade provided to the Klamath River by vegetation and geomorphology
William M. Forney, Christopher E. Soulard, C. Christopher Chickadel
2013, Scientific Investigations Report 2013-5022
The U.S. Geological Survey is studying approaches to characterize the thermal regulation of water and the dynamics of cold water refugia. High temperatures have physiological impacts on anadromous fish species. Factors affecting the presence, variability, and quality of thermal refugia are known, such as riverine and watershed processes, hyporheic flows,...
A new data set for estimating organic carbon storage to 3 m depth in soils of the northern circumpolar permafrost region
G. Hugelius, James G. Bockheim, P. Camill, B. Elberling, G. Grosse, J.W. Harden, Kevin Johnson, T. Jorgenson, C.D. Koven, P. Kuhry, G. Michaelson, U. Mishra, J. Palmtag, C.-L. Ping, J. O'Donnell, L. Schirrmeister, E.A.G. Schuur, Y. Sheng, L.C. Smith, J. Strauss, Z. Yu
2013, Earth System Science Data (5) 393-402
High-latitude terrestrial ecosystems are key components in the global carbon cycle. The Northern Circumpolar Soil Carbon Database (NCSCD) was developed to quantify stocks of soil organic carbon (SOC) in the northern circumpolar permafrost region (a total area of 18.7 × 106 km2). The NCSCD is a geographical information system (GIS)...
Expression kinetics of key genes in the early innate immune response to Great Lakes viral hemorrhagic septicemia virus IVb infection in yellow perch (Perca flavescens)
Wendy Olson, Eveline Emmenegger, Jolene Glenn, Crystal Simchick, Jim Winton, Frederick Goetz
2013, Developmental and Comparative Immunology (41) 11-19
The recently discovered strain of viral hemorrhagic septicemia virus, VHSV-IVb, represents an example of the introduction of an extremely pathogenic rhabdovirus capable of infecting a wide variety of new fish species in a new host-environment. The goal of the present study was to delineate the expression kinetics of key genes...
Simulating boreal forest carbon dynamics after stand-replacing fire disturbance: insights from a global process-based vegetation model
C. Yue, P. Ciais, S. Luyssaert, P. Cadule, J. Harden, J. Randerson, V. Bellassen, T. Wang, S.L. Piao, B. Poulter, N. Viovy
2013, Biogeosciences (10) 8233-8252
Stand-replacing fires are the dominant fire type in North American boreal forests. They leave a historical legacy of a mosaic landscape of different aged forest cohorts. This forest age dynamics must be included in vegetation models to accurately quantify the role of fire in the historical and current regional forest...
Estimating floodplain sedimentation in the Laguna de Santa Rosa, Sonoma County, CA
Jennifer A. Curtis, Lorraine E. Flint, Cliff R. Hupp
2013, Wetlands (33) 29-45
We present a conceptual and analytical framework for predicting the spatial distribution of floodplain sedimentation for the Laguna de Santa Rosa, Sonoma County, CA. We assess the role of the floodplain as a sink for fine-grained sediment and investigate concerns regarding the potential loss of flood storage capacity due to...
Development and evaluation of a bioenergetics model for bull trout
Matthew G. Mesa, Lisa K. Welland, Helena E. Christiansen, Sally T. Sauter, David A. Beauchamp
2013, Transactions of the American Fisheries Society (142) 41-49
We conducted laboratory experiments to parameterize a bioenergetics model for wild Bull Trout Salvelinus confluentus, estimating the effects of body mass (12–1,117 g) and temperature (3–20°C) on maximum consumption (C max) and standard metabolic rates. The temperature associated with the highest C max was 16°C, and C max showed the...
