Spatiotemporal earthquake clusters along the North Anatolian fault zone offshore Istanbul
Fatih Bulut, William L. Ellsworth, Marco Bohnhoff, Mustafa Aktar, Georg Dresen
2011, Bulletin of the Seismological Society of America (101) 1759-1768
We investigate earthquakes with similar waveforms in order to characterize spatiotemporal microseismicity clusters within the North Anatolian fault zone (NAFZ) in northwest Turkey along the transition between the 1999 İzmit rupture zone and the Marmara Sea seismic gap. Earthquakes within distinct activity clusters are relocated with cross-correlation derived relative travel...
Modal-pushover-based ground-motion scaling procedure
Erol Kalkan, Anil K. Chopra
2011, Journal of Structural Engineering (137) 298-310
Earthquake engineering is increasingly using nonlinear response history analysis (RHA) to demonstrate the performance of structures. This rigorous method of analysis requires selection and scaling of ground motions appropriate to design hazard levels. This paper presents a modal-pushover-based scaling (MPS) procedure to scale ground motions for use in a nonlinear...
Young (<7 Ma) gold deposits and active geothermal systems of the Great Basin: Enigmas, questions, and exploration potential
Mark F. Coolbaugh, Peter G. Vikre, James E. Faulds
2011, Conference Paper, Geological Society of Nevada Symposium 2010: Great Basin Evolution and Metallogeny
Young gold systems in the Great Basin (£ 7 Ma), though not as well studied as their older counterparts, comprise a rapidly growing and in some ways controversial group. The gold inventory for these systems has more than doubled in the last 5 years from roughly 370 tonnes (12 Moz)...
Spatial variations in focused exhumation along a continental-scale strike-slip fault: The Denali fault of the eastern Alaska Range
J.A. Benowitz, P.W. Layer, P. Armstrong, S.E. Perry, Peter J. Haeussler, P.G. Fitzgerald, S. VanLaningham
2011, Geosphere (7) 455-467
40Ar/39Ar, apatite fission-track, and apatite (U-Th)/He thermochronological techniques were used to determine the Neogene exhumation history of the topographically asymmetric eastern Alaska Range. Exhumation cooling ages range from ~33 Ma to ~18 Ma for 40Ar/39Ar biotite, ~18 Ma to ~6 Ma for K-feldspar minimum closure ages, and ~15 Ma to...
Energetic cost of ichthyophonus infection in Juvenile Pacific Herring (Clupea pallasii)
Johanna J. Vollenweider, J.L. Gregg, R.A. Heintz, P.K. Hershberger
2011, Journal of Parasitology Research (2011)
The energetic costs of fasting and Ichthyophonus infection were measured in juvenile Pacific herring (Clupea pallasii) in a lab setting at three temperatures. Infected herring incurred significant energetic costs, the magnitude of which depended on fish condition at the time of infection (fat versus lean). Herring that were fed continually and were...
Experimental study of near-field entrainment of moderately overpressured jets
S.A. Solovitz, L.G. Mastin, F. Saffaraval
2011, Journal of Fluids Engineering (133)
Particle image velocimetry (PIV) experiments have been conducted to study the velocity flow fields in the developing flow region of high-speed jets. These velocity distributions were examined to determine the entrained mass flow over a range of geometric and flow conditions, including overpressured cases up to an overpressure ratio of...
The dazed and confused identity of Agassiz's land tortoise, Gopherus agassizii (Testudines, Testudinidae) with the description of a new species, and its consequences for conservation
R. W. Murphy, K.H. Berry, T. Edwards, A.E. Leviton, A. Lathrop, J.D. Riedle
2011, ZooKeys (113) 39-41
We investigate a cornucopia of problems associated with the identity of the desert tortoise, Gopherus agassizii (Cooper). The date of publication is found to be 1861, rather than 1863. Only one of the three original cotypes exists, and it is designated as the lectotype of...
Connecting the Yakima fold and thrust belt to active faults in the Puget Lowland, Washington
R.J. Blakely, B.L. Sherrod, C.S. Weaver, R.E. Wells, A.C. Rohay, E. A. Barnett, N.E. Knepprath
2011, Journal of Geophysical Research B: Solid Earth (116)
High-resolution aeromagnetic surveys of the Cascade Range and Yakima fold and thrust belt (YFTB), Washington, provide insights on tectonic connections between forearc and back-arc regions of the Cascadia convergent margin. Magnetic surveys were measured at a nominal altitude of 250 m above terrain and along flight lines spaced 400 m...
Chapter 48 Geology and petroleum potential of the Eurasia Basin
Thomas E. Moore, Janet K. Pitman
2011, Geological Society Memoir (35) 731-750
The Eurasia Basin petroleum province comprises the younger, eastern half of the Arctic Ocean, including the Cenozoic Eurasia Basin and the outboard part of the continental margin of northern Europe. For the USGS petroleum assessment (CARA), it was divided into four assessment units (AUs): the Lena Prodelta AU, consisting of...
Geology and petroleum potential of the Lincoln Sea Basin, offshore North Greenland
K. Sorensen, D. Gautier, Janet K. Pitman, H. Ruth Jackson, T. Dahl-Jensen
2011, Geological Society Memoir (35) 673-684
A seismic refraction line crossing the Lincoln Sea was acquired in 2006. It proves the existence of a deep sedimentary basin underlying the Lincoln Sea. This basin appears to be comparable in width and depth to the Sverdrup Basin of the Canadian Arctic Islands. The stratigraphy of the Lincoln Sea...
Avian research on U.S. Forest Service Experimental Forests and Ranges: Emergent themes, opportunities, and challenges
Scott H. Stoleson, D.I. King, M. Tomosy
2011, Forest Ecology and Management (262) 49-52
Since 1908, U.S. Forest Service Experimental Forests and Ranges have been dedicated to long-term interdisciplinary research on a variety of ecological and management questions. They encompass a wide diversity of life zones and ecoregions, and provide access to research infrastructure, opportunities for controlled manipulations, and integration with other types of...
Few apparent short-term effects of elevated soil temperature and increased frequency of summer precipitation on the abundance and taxonomic diversity of desert soil micro- and meso-fauna
B.J. Darby, D.A. Neher, D.C. Housman, J. Belnap
2011, Soil Biology and Biochemistry (43) 1474-1481
Frequent hydration and drying of soils in arid systems can accelerate desert carbon and nitrogen mobilization due to respiration, microbial death, and release of intracellular solutes. Because desert microinvertebrates can mediate nutrient cycling, and the autotrophic components of crusts are known to be sensitive to rapid desiccation due to elevated...
Effects of reduction in porosity and permeability with depth on storage capacity and injectivity in deep saline aquifers: A case study from the Mount Simon Sandstone aquifer
C.R. Medina, J.A. Rupp, D.A. Barnes
2011, International Journal of Greenhouse Gas Control (5) 146-156
The Upper Cambrian Mount Simon Sandstone is recognized as a deep saline reservoir that has significant potential for geological sequestration in the Midwestern region of the United States. Porosity and permeability values collected from core analyses in rocks from this formation and its lateral equivalents in Indiana, Kentucky, Michigan, and...
An Analysis of the Published Mineral Resource Estimates of the Haji-Gak Iron Deposit, Afghanistan
David M. Sutphin, Karine Renaud, Lawrence J. Drew
2011, Natural Resources Research (20) 329-353
The Haji-Gak iron deposit of eastern Bamyan Province, eastern Afghanistan, was studied extensively and resource calculations were made in the 1960s by Afghan and Russian geologists. Recalculation of the resource estimates verifies the original estimates for categories A (in-place resources known in detail), B (in-place resources known in moderate detail),...
New insights of tsunami hazard from the 2011 Tohoku-oki event
K. Goto, C. Chague-Goff, S. Fujino, J. Goff, Bruce Jaffe, Y. Nishimura, Bruce M. Richmond, D. Sugawara, Witold Szczucinski, D.R. Tappin, Robert C. Witter, E. Yulianto
2011, Marine Geology (290) 46-50
We report initial results from our recent field survey documenting the inundation and resultant deposits of the 2011 Tohoku-oki tsunami from Sendai Plain, Japan. The tsunami inundated up to 4.5 km inland but the > 0.5 cm-thick sand deposit extended only 2.8 km (62% of the inundation distance). The deposit however continued as a...
A coral Sr/Ca calibration and replication study of two massive corals from the Gulf of Mexico
Kristine L. DeLong, Jennifer A. Flannery, Christopher R. Maupin, Richard Z. Poore, Terrence M. Quinn
2011, Palaeogeography, Palaeoclimatology, Palaeoecology (307) 117-128
This study examined the variations in the ratio of strontium-to-calcium (Sr/Ca) for two Atlantic corals (Montastraea faveolata and Siderastrea siderea) from the Dry Tortugas National Park (centered on 24.7°N, 82.8°W) in the Gulf of Mexico. Cores from coral colonies in close proximity (10s of meters) and with the same environmental conditions (i.e.,...
High-resolution three-dimensional imaging and analysis of rock falls in Yosemite valley, California
Gregory M. Stock, Gerald W. Bawden, J.K. Green, E. Hanson, G. Downing, Brian D. Collins, Sandra Bond, M. Leslar
2011, Geosphere (7) 573-581
We present quantitative analyses of recent large rock falls in Yosemite Valley, California, using integrated high-resolution imaging techniques. Rock falls commonly occur from the glacially sculpted granitic walls of Yosemite Valley, modifying this iconic landscape but also posing significant potential hazards and risks. Two large rock falls occurred from the...
Location and agricultural practices influence spring use of harvested cornfields by cranes and geese in Nebraska
Michael J. Anteau, Mark H. Sherfy, A.A. Bishop
2011, Journal of Wildlife Management (75) 1004-1011
Millions of ducks, geese, and sandhill cranes (Grus canadensis; hereafter cranes) stop in the Central Platte River Valley (CPRV) of Nebraska to store nutrients for migration and reproduction by consuming corn remaining in fields after harvest. We examined factors that influence use of cornfields by cranes and geese (all mid‐continent...
Complex dynamics at the interface between wild and domestic viruses of finfish
Gael Kurath, J. Winton
2011, Current Opinion in Virology (1) 73-80
Viral traffic occurs readily between wild and domesticated stocks of finfish because aquatic environments have greater connectivity than their terrestrial counterparts and because the global expansion and dynamic nature of intensive aquaculture provide multiple pathways of transmission and unique drivers of virus adaptation. Supported by examples from the literature, we...
Effects of slow recovery rates on water column geochemistry in aquitard wells
K. E. Schilling
2011, Applied Geochemistry (26) 1108-1114
Monitoring wells are often installed in aquitards to verify effectiveness for preventing migration of surface contaminants to underlying aquifers. However, water sampling of aquitard wells presents a challenge due to the slow recovery times for water recharging the wells, which can take as long as weeks, months or years to...
Salvage logging versus the use of burnt wood as a nurse object to promote post-fire tree seedling establishment
J. Castro, Craig D. Allen, M. Molina-Morales, Sara Maranon-Jimenez, A. Sanchez-Miranda, R. Zamora
2011, Restoration Ecology (19) 537-544
Intense debate surrounds the effects of post-fire salvage logging (SL) versus nonintervention policies on forest regeneration, but scant support is available from experimental studies. We analyze the effect of three post-fire management treatments on the recruitment of a serotinous pine (Pinus pinaster) at a Mediterranean mountain. Treatments were applied 7...
Making United States Integrated Ocean Observing System (U.S. IOOS) inclusive of marine biological resources
H. Moustahfid, J. Potemra, P. Goldstein, R. Mendelssohn, A. Desrochers
2011, Conference Paper, OCEANS'11 - MTS/IEEE Kona, Program Book
An important Data Management and Communication (DMAC) goal is to enable a multi-disciplinary view of the ocean environment by facilitating discovery and integration of data from various sources, projects and scientific domains. United States Integrated Ocean Observing System (U.S. IOOS) DMAC functional requirements are based upon guidelines for standardized data...
Use of habitats by female mallards wintering in Southwestern Louisiana
Paul T. Link, A. D. Afton, R. R. Cox Jr., B.E. Davis
2011, Waterbirds (34) 429-438
Habitat use by wintering Mallards (Anas platyrhychos) on the Gulf Coast Chenier Plain (GCCP) has received little study and quantitative data is needed for management of GCCP waterfowl. Radio-telemetry techniques were used to record habitats used by 135 female Mallards during winters 2004-2005 and 2005-2006 in south-western Louisiana. Habitat use...
Patterns of coral disease across the Hawaiian Archipelago: Relating disease to environment
G.S. Aeby, G.J. Williams, E.C. Franklin, J. Kenyon, E.F. Cox, S. Coles, Thierry M. Work
2011, PLoS ONE (6)
In Hawaii, coral reefs occur across a gradient of biological (host abundance), climatic (sea surface temperature anomalies) and anthropogenic conditions from the human-impacted reefs of the main Hawaiian Islands (MHI) to the pristine reefs of the northwestern Hawaiian Islands (NWHI). Coral disease surveys were conducted at 142 sites from across...
Transitions of interaction outcomes in a uni-directional consumer-resource system
Y. Wang, Donald L. DeAngelis
2011, Journal of Theoretical Biology (280) 43-49
A uni-directional consumer–resource system of two species is analyzed. Our aim is to understand the mechanisms that determine how the interaction outcomes depend on the context of the interaction; that is, on the model parameters. The dynamic behavior of the model is described and, in particular, it is demonstrated that no periodic...
