The Wallula fault and tectonic framework of south-central Washington, as interpreted from magnetic and gravity anomalies
Richard J. Blakely, Brian L. Sherrod, Craig S. Weaver, Ray E. Wells, Alan C. Rohay
2014, Tectonophysics (624-625) 32-45
The Yakima fold and thrust belt (YFTB) in central Washington has accommodated regional, mostly north-directed, deformation of the Cascadia backarc since prior to emplacement of Miocene flood basalt of the Columbia River Basalt Group (CRBG). The YFTB consists of two structural domains. Northern folds of the YFTB strike eastward and...
Well log and 2D seismic data character of the Wilcox Group in south-central Louisiana
Catherine B. Enomoto
2014, Gulf Coast Association of Geological Societies Transactions (64) 105-118
Well logs and 2D seismic data were used to interpret the depth and morphology of potential Paleocene and lower Eocene Wilcox Group slope and basin-floor reservoirs in south-central Louisiana. These may occur in a poorly explored area previously estimated by the U.S. Geological Survey to contain a mean undiscovered conventional...
Thermochronology of Cretaceous batholithic rocks in the northern Peninsular Ranges batholith, southern California: Implications for the Late Cretaceous tectonic evolution of southern California
Daniel P. Miggins, Wayne R. Premo, Lawrence W. Snee, Ross Yeoman, Nancy D. Naeaer, Charles W. Naeser, Douglas M. Morton
2014, Book chapter, Peninsular ranges Batholith, Baja California and southern California: Geological Society of America Memoir 211
The thermochronology for several suites of Mesozoic metamorphic and plutonic rocks collected throughout the northern Peninsular Ranges batholith (PRB) was studied as part of a collaborative isotopic study to further our understanding of the magmatic and tectonic history of southern California. These sample suites include: a traverse through the plutonic...
Pros and cons of rotating ground motion records to fault-normal/parallel directions for response history analysis of buildings
Erol Kalkan, Neal S. Kwong
2014, Journal of Structural Engineering (140) 1-14
According to the regulatory building codes in the United States (e.g., 2010 California Building Code), at least two horizontal ground motion components are required for three-dimensional (3D) response history analysis (RHA) of building structures. For sites within 5 km of an active fault, these records should be rotated to...
Age and isotopic systematics of Cretaceous borehole and surface samples from the greater Los Angeles Basin region: Implications for the types of crust that might underlie Los Angeles and their distribution along late Cenozoic fault systems
Wayne R. Premo, Douglas M. Morton, Ronald W. Kistler
2014, Book chapter, Peninsular ranges Batholith, Baja California and southern California: Geological Society of America Memoir 211
Nine U-Pb zircon ages were determined on plutonic rocks sampled from surface outcrops and rock chips of drill core from boreholes within the greater Los Angeles Basin region. In addition, lead-strontium-neodymium (Pb-Sr-Nd) whole-rock isotopic data were obtained for eight of these samples. These results help to characterize the crystalline basement...
Pb-Sr-Nd-O isotopic characterization of Mesozoic rocks throughout the northern end of the Peninsular Ranges batholith: Isotopic evidence for the magmatic evolution of oceanic arc–continental margin accretion during the Late Cretaceous of southern California
Ronald W. Kistler, Joseph L. Wooden, Wayne R. Premo, Douglas M. Morton
2014, Book chapter, Peninsular ranges Batholith, Baja California and southern California: Geological Society of America Memoir 211
Within the duration of the U.S. Geological Survey (USGS)–based Southern California Areal Mapping Project (SCAMP), many samples from the northern Peninsular Ranges batholith were studied for their whole-rock radioisotopic systematics (rubidium-strontium [Rb-Sr], uranium-thorium-lead [U-Th-Pb], and samarium-neodymium [Sm-Nd]), as well as oxygen (O), a stable isotope. The results of three main...
SHRIMP-RG U-Pb ages of provenance and metamorphism from detrital zircon populations and Pb-Sr-Nd signatures of prebatholithic metasedimentary rocks at Searl Ridge, northern Peninsular Ranges batholith, southern California: Implications for their age, origin, and tectonic setting
Wayne R. Premo, Douglas M. Morton
2014, Book chapter, Peninsular ranges Batholith, Baja California and southern California: Geological Society of America Memoir 211
Twenty-four samples were collected from prebatholithic metasedimentary rocks along Searl Ridge, the north rim of the Diamond Valley Reservoir, Domenigoni Valley, centrally located in the northern Peninsular Ranges of southern California. These rocks exhibit progressive metamorphism from west to east across fundamental structural discontinuities now referred to as a “transition...
Water quality monitoring protocol for wadeable streams and rivers in the Northern Great Plains Network
Marcia H. Wilson, Barbara L. Rowe, Robert A. Gitzen, Stephen K. Wilson, Kara J. Paintner-Green
2014, Natural Resource Report NPS/NGPN/NRR—2014/868
Preserving the national parks unimpaired for the enjoyment of future generations is a fundamental purpose of the National Park Service (NPS). To address growing concerns regarding the overall physical, chemical, and biological elements and processes of park ecosystems, the NPS implemented science-based management through “Vital Signs” monitoring in 270 national...
U-Pb zircon geochronology of plutonism in the northern Peninsular Ranges batholith, southern California: Implications for the Late Cretaceous tectonic evolution of southern California
Wayne R. Premo, Douglas M. Morton, Joseph L. Wooden, C. Mark Fanning
2014, Book chapter, Peninsular ranges Batholith, Baja California and southern California: Geological Society of America Memoir 211
Utilizing both sensitive high-resolution ion microprobe (SHRIMP) and conventional isotope dilution–thermal ionization mass spectrometry (ID-TIMS) methods, crystallization and/or emplacement ages have been obtained for a suite of Cretaceous intermediate-composition plutonic samples collected along a roughly E-W–trending traverse through the northern Peninsular Ranges batholith. Previously noted petrologic, mineralogic, and textural differences...
Mapping advanced argillic alteration at Cuprite, Nevada, using imaging spectroscopy
Gregg A. Swayze, Roger N. Clark, Alexander F.H. Goetz, K. Eric Livo, George N. Breit, Fred A. Kruse, Stephen J. Sutley, Lawrence W. Snee, Heather A. Lowers, James L. Post, Roger E. Stoffregen, Roger P. Ashley
2014, Economic Geology (109) 1179-1221
Mineral maps based on Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data were used to study late Miocene advanced argillic alteration at Cuprite, Nevada. Distributions of Fe-bearing minerals, clays, micas, sulfates, and carbonates were mapped using the Tetracorder spectral-shape matching system. The Al content of white micas increases toward altered areas and...
Geophysical and hydrologic studies of lake seepage variability
Laura Toran, Jonathan E. Nyquist, Donald O. Rosenberry, Michael P. Gagliano, Natasha Mitchell, James Mikochik
2014, Groundwater (53) 841-850
Variations in lake seepage were studied along a 130 m shoreline of Mirror Lake NH. Seepage was downward from the lake to groundwater; rates measured from 28 seepage meters varied from 0 to −282 cm/d. Causes of this variation were investigated using electrical resistivity surveys and lakebed sediment characterization. Two-dimensional...
Estuarine removal of glacial iron and implications for iron fluxes to the ocean
Andrew W. Schroth, John Crusius, Ian Hoyer, Robert Campbell
2014, Geophysical Research Letters (41) 3951-3958
While recent work demonstrates that glacial meltwater provides a substantial and relatively labile flux of the micronutrient iron to oceans, the role of high-latitude estuary environments as a potential sink of glacial iron is unknown. Here we present the first quantitative description of iron removal in a meltwater-dominated estuary. We...
Source, conveyance and fate of suspended sediments following Hurricane Irene. New England, USA
Brian Yellen, Jon D. Woodruff, Laura N. Kratz, Steven B. Mabee, Jonathan Morrison, Anna M. Martini
2014, Geomorphology (226) 124-134
Hurricane Irene passed directly over the Connecticut River valley in late August, 2011. Intense precipitation and high antecedent soil moisture resulted in record flooding, mass wasting and fluvial erosion, allowing for observations of how these rare but significant extreme events affect a landscape still responding to Pleistocene glaciation and associated...
Integrating research tools to support the management of social-ecological systems under climate change
Brian W. Miller, Jeffrey T. Morisette
2014, Ecology and Society (19) 1-12
Developing resource management strategies in the face of climate change is complicated by the considerable uncertainty associated with projections of climate and its impacts and by the complex interactions between social and ecological variables. The broad, interconnected nature of this challenge has resulted in calls for analytical frameworks that integrate...
Strategic conservation planning for the Eastern North Carolina/Southeastern Virginia Strategic Habitat Conservation Team
Louise B. Alexander-Vaughn, Jaime A. Collazo, C. Ashton Drew
2014, Technical Bulletin 337
The Eastern North Carolina/Southeastern Virginia Strategic Habitat Conservation Team (ENCSEVA) is a partnership among local federal agencies and programs with a mission to apply Strategic Habitat Conservation to accomplish priority landscape-level conservation within its geographic region. ENCSEVA seeks to further landscape-scale conservation through collaboration with local partners. To accomplish this...
Frictional properties of exhumed fault gouges in DFDP-1 cores, Alpine Fault, New Zealand
Carolyn Boulton, Diane E. Moore, David A. Lockner, Virginia G. Toy, John Townend, Rupert Southerland
2014, Geophysical Research Letters (41) 356-362
Principal slip zone gouges recovered during the Deep Fault Drilling Project (DFDP-1), Alpine Fault, New Zealand, were deformed in triaxial friction experiments at temperatures, T, of up to 350°C, effective normal stresses, σn′, of up to 156 MPa, and velocities between 0.01 and 3 µm/s. Chlorite/white mica-bearing DFDP-1A blue gouge, 90.62 m sample depth, is...
Experimental additions of aluminum sulfateand ammonium nitrate to in situ mesocosms toreduce cyanobacterial biovolume and microcystinconcentration
Theodore D. Harris, Frank M. Wilhelm, Jennifer L. Graham, Keith A. Loftin
2014, Lake and Reservoir Management (30) 84-93
Recent studies suggest that nitrogen additions to increase the total nitrogen:total phosphorus (TN:TP) ratio may reduce cyanobacterial biovolume and microcystin concentration in reservoirs. In systems where TP is >100 μg/L, however, nitrogen additions to increase the TN:TP ratio could cause ammonia, nitrate, or nitrite toxicity to terrestrial and aquatic organisms. Reducing phosphorus via...
Gear and seasonal bias associated with abundance and size structure estimates for lentic freshwater fishes
Jesse R. Fischer, Michael C. Quist
2014, Journal of Fish and Wildlife Management (5) 394-412
All freshwater fish sampling methods are biased toward particular species, sizes, and sexes and are further influenced by season, habitat, and fish behavior changes over time. However, little is known about gear-specific biases for many common fish species because few multiple-gear comparison studies exist that have incorporated seasonal dynamics. We...
Development of a generic auto-calibration package for regional ecological modeling and application in the Central Plains of the United States
Yiping Wu, Shuguang Liu, Zhengpeng Li, Devendra Dahal, Claudia J. Young, Gail L. Schmidt, Jinxun Liu, Brian Davis, Terry L. Sohl, Jeremy M. Werner, Jennifer Oeding
2014, Ecological Informatics (19) 35-46
Process-oriented ecological models are frequently used for predicting potential impacts of global changes such as climate and land-cover changes, which can be useful for policy making. It is critical but challenging to automatically derive optimal parameter values at different scales, especially at regional scale, and validate the model performance. In...
Preliminary testing of flow-ecology hypotheses developed for the GCP LCC region
Shannon K. Brewer, Mary Davis
2014, Cooperator Science Series FWS/CSS-108-2014
The Ecological Limits of Hydrological Alteration (ELOHA) framework calls for the development of flow-ecology hypotheses to support protection of the flow regime from ecologically harmful alteration due to human activities. As part of a larger instream flow project for the Gulf Coast Prairie Landscape Conservation Cooperative (GCP LCC), regional flow-ecology...
Application of hydrologic tools and monitoring to support managed aquifer recharge decision making in the Upper San Pedro River, Arizona, USA
Laurel J. Lacher, Dale S. Turner, Bruce Gungle, Brooke M. Bushman, Holly E. Richter
2014, Water (6) 3495-3527
The San Pedro River originates in Sonora, Mexico, and flows north through Arizona, USA, to its confluence with the Gila River. The 92-km Upper San Pedro River is characterized by interrupted perennial flow, and serves as a vital wildlife corridor through this semiarid to arid region. Over the past century,...
Climate Change 2014: Technical Summary
Chrisopher B. Field, Vicente Barros, Katherine Mach, Michael Mastrandrea, Maarten van Aalst, Niel Adger, Douglas J Arent, Jonathan Barnett, Richard Betts, Eren Bilir, Joern Birkmann, Joann Carmin, Dave Chadee, Andrew Challinor, Monalisa Chaterjee, Wolfgang Cramer, Debra Davidson, Yuka Estrada, Jean-Pierre Gatusso, Yasuakai Hijioka, Gary Yohe, Margaret Hiza, Ove Hoegh-Guldberg, He-Qing Huang, Gregory Insarov, Roger Jones, Sari Kovats, Patricia Romero Lankao, Joan Nymand Larsen, Inigo Losada, Jose Marengo, Roger McLean, Linda Mearns, Reinhard Mechler, John Morton, Isabelle Niang, Taikan Oki, Jane Mukarugwiza Olwoch, Maggie Opondo, Elvira Poloczanska, Hans #NAME? Portner, Andy Reisinger, Aromar Revi, Daniela Schmidt, Rebecca Shaw, William Solecki, Daithi Stone, John Stone, Ken Strzepek, Avelino G. Suarez, Petra Tschakert, Riccardo Valentini, Sebastian Vicuna, Alicia Villamizar, Katharine Vincent, Rachel Warren, Leslie White, Thomas Wilbanks, Poh Poh Wong
2014, Book chapter, Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change
Human interference with the climate system is occurring (WGI AR5 SPM Section D.3; WGI AR5 Sections 2.2, 6.3, 10.3 to 10.6, 10.9). Climate change poses risks for human and natural systems. The assessment of impacts, adaptation, and vulnerability in the Working Group II contribution to the IPCC’s Fifth Assessment Report...
Trends in the capture fisheries in Cuyo East Pass, Philippines
Tee-Jay A. San Diego, William L. Fisher
2014, International Journal of Fisheries and Aquatic Studies (1) 57-72
Findings are presented of a comprehensive analysis of time series catch and effort data from 2000 to 2006 collected from a multi-species, multi-gear and two-sector (municipal and commercial) capture fisheries in Cuyo East Pass, Philippines. Multivariate techniques were used to determine temporal variation in species composition and gear selectivity that...
Mammoth Mountain and its mafic periphery—A late Quaternary volcanic field in eastern California
Wes Hildreth, Judith Fierstein, Duane E. Champion, Andrew T. Calvert
2014, Geosphere (10) 1315-1365
The trachydacite complex of Mammoth Mountain and an array of contemporaneous mafic volcanoes in its periphery together form a discrete late Pleistocene magmatic system that is thermally and compositionally independent of the adjacent subalkaline Long Valley system (California, USA). The Mammoth system first erupted ca. 230 ka, last erupted ca....
The Devonian Marcellus Shale and Millboro Shale
Daniel J. Soeder, Catherine B. Enomoto, John A. Chermak
2014, GSA Field Guides (35) 129-160
The recent development of unconventional oil and natural gas resources in the United States builds upon many decades of research, which included resource assessment and the development of well completion and extraction technology. The Eastern Gas Shales Project, funded by the U.S. Department of Energy in the 1980s, investigated the...
