Hydrothermal alteration of the Late Eocene Caetano ash-flow caldera, north-central Nevada: A field and ASTER remote sensing study
David A. John, Barnaby W. Rockwell, Christopher D. Henry, Joseph P. Colgan
2010, Conference Paper, Proceedings of the Geological Society of Nevada 2010 symposium
Geologic mapping and analysis of ASTER remote sensing data were used to define the effects of a large hydrothermal system in the 12–18 by 22 km Caetano caldera. The caldera formed at ~33.8Ma during eruption of >1100km3 of the rhyolitic Caetano Tuff that left a 1 km deep basin which...
Microbial community shifts influence patterns in tropical forest nitrogen fixation
Sasha C. Reed, A.R. Townsend, C.C. Cleveland, D.R. Nemergut
2010, Oecologia (164) 521-531
The role of biodiversity in ecosystem function receives substantial attention, yet despite the diversity and functional relevance of microorganisms, relationships between microbial community structure and ecosystem processes remain largely unknown. We used tropical rain forest fertilization plots to directly compare the relative abundance, composition and diversity of free-living nitrogen (N)-fixer communities to in situ leaf litter...
USGS-NPS Servicewide Benthic Mapping Program (SBMP) workshop report
Christopher S. Moses, Amar Nayagandhi, John Brock, Rebecca Beavers
2010, Open-File Report 2010-1194
Executive SummaryThe National Park Service (NPS) Inventory and Monitoring (I&M) Program recently allocated funds to initiate a benthic mapping program in ocean and Great Lakes parks in alignment with the NPS Ocean Park Stewardship 2007-2008 Action Plan. Seventy-four (ocean and Great Lakes) parks, spanning more than 5,000 miles of coastline,...
Reply to comments of Nolan and Cook
Larry V. Benson, T. R. Pauketat, Edward R Cook
2010, American Antiquity (75) 984-985
The following reply to the comments by Nolan and Cook makes the following points. The Palmer Drought Severity Index (PDSI) is not a measure of summer rainfall. Cahokia's "Big Bang" dates to the end of the Edelhardt phase and continued through the Lohmann phase. The "American Bottom" refers only to...
Delaware Water Gap; a geology classroom
Jack B. Epstein
2010, Conference Paper, New York State Geological Association 82nd annual meeting; field trip guidebook
No abstract available....
Population demographics and breeding ecology of the Long-tailed Duck (Clangula hyemalis) in the Churchill, Manitoba area
Matthew C. Perry, Robert M. Alison
2010, Book chapter, Hudson Bay region research
No abstract available....
NEXRAD tracks wintering waterfowl
Lori A. Randall, Wylie C. Barrow Jr.
2010, Gulf Crossings (14) 9-9
No abstract available....
Self calibration of small and medium format digital cameras
Donald Moe, Aparajithan Sampath, Jon Christopherson, Mike Benson
2010, Conference Paper, ISPRS technical commission VII symposium 100 Years ISPRS advancing remote sensing science
The knowledge of a camera’s interior orientation parameters are a prerequisite for the camera to be used in any precision photogrammetric project. Historically, the interior orientation parameters have been determined by analyzing the measured ground 3D coordinates of photo-identifiable targets, and their 2D (image) coordinates from multiple images of these...
Yellowstone River Compact Commission fifty-ninth annual report 2010
Wayne R. Berkas
2010, Report
No abstract available....
Ancient Saltworks of the Sierra Nevada
James G. Moore, Michael F. Diggles
2010, The Explorers Journal (88) 40-45
No abstract available....
Performance of map symbol and label design with format and display resolution options through scale for the national map
C. A. Brewer, C. L. Hanchett, B. P. Butterfield, E. Lynn Usery
2010, Conference Paper
Symbol and label design for U.S. topographic mapping using data from The National Map has been progressing, partly in support of research by Buttenfield and Stanislawski on hydrographic generalization, and is sponsored by CEGIS, the USGS Center of Excellence for Geospatial Information Science. The work also seeks to make the...
Geological sources of radionuclides and arsenic in Triassic age rift-valley sediments (Newark Supergroup) and implications for distribution in groundwater in Mercer County, New Jersey
Zoltan Szabo, Julia Barringer, Steve Spayd
2010, Conference Paper, Geology of the greater Trenton area and its impact on the capital city: Twenty-seventh Annual Meeting Geological Association of New Jersey : October 8-9, 2010: Field guide and proceedings
No abstract available....
Global research priorities for sea turtles: Informing management and conservation in the 21st century
M. Hamann, M.H. Godfrey, J.A. Seminoff, P.C.R. Barata, K.A. Bjorndal, A.B. Bolten, A.C. Broderick, L.M. Campbell, C. Carreras, P. Casale, M. Chaloupka, S.-K. Chan, M. Coyne, L.B. Crowder, C.E. Diez, P.H. Dutton, S.P. Epperly, N.N. FitzSimmons, A. Formia, M. Girondot, G.C. Hays, I.J. Cheng, Y. Kaska, R. Lewison, J.A. Mortimer, W.J. Nichols, R.D. Reina, K. Shanker, J.R. Spotila, J. Tomás, B.P. Wallace, Thierry M. Work, N. Zbinden, B.J. Godley
2010, Endangered Species Research (11) 245-269
Over the past 3 decades, the status of sea turtles and the need for their protection to aid population recovery have increasingly captured the interest of government agencies, non-governmental organisations (NGOs) and the general public worldwide. This interest has been matched by increased research attention, focusing on a wide variety...
Salmon carcasses increase stream productivity more than inorganic fertilizer pellets: A test on multiple trophic levels in streamside experimental channels
Mark S. Wipfli, John P. Hudson, John P. Caouette, N.L. Mitchell, Joanna L. Lessard, Ron A. Heintz, D. T. Chaloner
2010, Transactions of the American Fisheries Society (139) 824-839
Inorganic nutrient amendments to streams are viewed as possible restoration strategies for re-establishing nutrients and stream productivity throughout the western coast of North America, where salmon runs and associated marine-derived nutrient subsidies have declined. In a mesocosm experiment, we examined the short-term (6 weeks) comparative effects of artificial nutrient pellets...
Aquifer characteristics near cuestas and their relation to rock tensile strength
Roger H. Morin, William H. Schulz
James LoCoco, editor(s)
2010, Conference Paper
Along the northeast coast of North America, extensional tectonic processes have generated lithologic and topographic features that are common to several rift basins. A cap of igneous rock overlies sedimentary rock to form a cuesta with both rock types exposed along a steep ridge flank. Field studies investigating the near‐surface...
Topographic evolution of sandbars: Flume experiment and computational modeling
Paul J. Kinzel, Jonathan M. Nelson, Richard R. McDonald, Brandy L. Logan
2010, Conference Paper
Measurements of sandbar formation and evolution were carried out in a laboratory flume and the topographic characteristics of these barforms were compared to predictions from a computational flow and sediment transport model with bed evolution. The flume experiment produced sandbars with approximate mode 2, whereas numerical simulations produced a bed...
High-resolution receiver function imaging reveals Colorado Plateau lithospheric architecture and mantle-supported topography
Dorothy L. Domingo, R. Aster, S. Grand, J Ni, W.S. Baldridge, David C. Wilson USGS
2010, Geophysical Research Letters (37)
After maintaining elevations near sea level for over 500 million years, the Colorado Plateau (CP) has a present average elevation of 2 km. We compute new receiver function images from the first dense seismic transect to cross the plateau that reveal a central CP crustal thickness of 42–50 km thinning...
GAGES: A stream gage database for evaluating natural and alteredflow conditions in the conterminous United States
James A. Falcone, Daren M. Carlisle, David M. Wolock, Michael R. Meador
2010, Ecology (91) 621-621
Stream flow is a controlling element in the ecology of rivers and streams. Knowledge of the natural flow regime facilitates the assessment of whether specific hydrologic attributes have been altered by humans in a particular stream and the establishment of specific goals for stream-flow restoration. Because most streams are ungaged...
Effects of groundwater-flow paths on nitrate concentrations across two riparian forest corridors
Gary K. Speiran
2010, Journal of the American Water Resources Association (46) 246-260
Groundwater levels, apparent age, and chemistry from field sites and groundwater-flow modeling of hypothetical aquifers collectively indicate that groundwater-flow paths contribute to differences in nitrate concentrations across riparian corridors. At sites in Virginia (one coastal and one Piedmont), lowland forested wetlands separate upland fields from nearby surface waters (an estuary...
Storm surge modeling and applications in coastal areas
Shisir K. Dube, Tad S. Murty, Jesse C. Feyen, Reggina Cabrera, Bruce A. Harper, Jerad D. Bales, Saud A. Amer
2010, Book chapter, World Scientific Series on Asia-Pacific Weather and Climate
This chapter introduces the reader to a wide spectrum of storm surge modeling systems used to assess the impact of tropical cyclones, covering a range of numerical methods, model domains, forcing and boundary conditions, and purposes. New technologies to obtain data such as deployment of temporary sensors and remote sensing...
Increasing precision of turbidity-based suspended sediment concentration and load estimates
John D. Jastram, Carl E. Zipper, Lucian W. Zelanzny, Kenneth Hyer
2010, Journal of Environmental Quality (39) 1306-1316
Turbidity is an effective tool for estimating and monitoring suspended sediments in aquatic systems. Turbidity can be measured in situ remotely and at fine temporal scales as a surrogate for suspended sediment concentration (SSC), providing opportunity for a more complete record of SSC than is possible with physical sampling approaches....
Comparison of atmospheric mercury speciation and deposition at nine sites across central and eastern North America
Mark A. Engle, Michael T. Tate, David P. Krabbenhoft, James J Schauer, Allan Kolker, James B. Shanley, Michael Bothner
2010, Journal of Geophysical Research (115)
This study presents >5 cumulative years of tropospheric mercury (Hg) speciation measurements, over the period of 2003–2009, for eight sites in the central and eastern United States and one site in coastal Puerto Rico. The purpose of this research was to identify local and regional processes that impact Hg speciation...
Developing a spatially distributed terrestrial biogeochemical cycle modeling system to support the management of Fort Benning and its surrounding areas
Shuguang Liu, Larry L. Tieszen, Shuqing Zhao, Zhen Li, Jinxun Liu
2010, Report
The overarching goal of this project is to develop an advanced, spatially distributed biogeochemical cycle modeling system to simulate the dynamics of ecosystem C and N cycles under historical, current, and future land use and disturbances scenarios. The modeling system and simulated results were used to facilitate the evaluation of...
Erosion of tilted fault blocks and deposition of coarse sediments in half-graben basins during late stages of extension: Gold Butte area, Basin and Range Province
Keith A. Howard, Sue Beard, M. A. Kuntz, Michael J. Kunk, Andrei M. Sarna-Wojcicki, M. E. Perkins, Ivo Lucchitta
2010, GSA Special Papers (463) 147-170
The provenance and stratigraphic architecture of basin-filling Miocene sediments around the Gold Butte area, southern Nevada, and adjacent highlands record the erosion of fault blocks that progressively tilted during extension. This study focuses especially on upper Miocene correlatives of the red sandstone unit and the Muddy Creek Formation that were...
Influence of drought conditions on brown trout biomass and size structure in the Black Hills, South Dakota
Daniel A. James, Jerry W. Wilhite, Steven R. Chipps
2010, North American Journal of Fisheries Management (30) 791-798
We evaluated the influence of drought conditions on the biomass of brown trout Salmo trutta in Spearfish Creek, upper Rapid Creek, and lower Rapid Creek in the Black Hills of western South Dakota. Stream discharge, mean summer water temperature, the biomass of juvenile and adult brown trout, and brown trout size structure...
