Vegetation effects on fish distribution in impounded salt marshes
Eric D. Stolen, Jaime Collazo, H. Franklin Percival
2009, Southeastern Naturalist (8) 503-514
We compared the density and biomass of resident fish in vegetated and unvegetated flooded habitats of impounded salt marshes in the northern Indian River Lagoon (IRL) Estuary of east-central Florida. A 1-m2 throw trap was used to sample fish in randomly located, paired sample plots (n = 198 pairs) over 5...
Introduction NE Forests 2100: A synthesis of climate change impacts on forests of the northeastern US and eastern Canada
L. E. Rustad, J.L. Campbell, R. M. Cox, J. S. Dukes, Thomas G. Huntington, A. H. Magill, J. E. Mohan, A.D. Richardson, N. L. Rodenhouse, M. R. Watson
2009, Canadian Journal of Forest Research (39) v-x
No abstract available....
Geophysical data from offshore of the Chandeleur Islands, eastern Mississippi Delta
Wayne E. Baldwin, Elizabeth A. Pendleton, David C. Twichell
2009, Open-File Report 2008-1195
This report contains the geophysical and geospatial data that were collected during two cruises on the R/V Acadiana along the eastern, offshore side of the Chandeleur Islands in 2006 and 2007. Data were acquired with the following equipment: a Systems Engineering and Assessment, Ltd., SwathPlus interferometric sonar; a Klein 3000...
Accessory mineral U–Th–Pb ages and 40Ar/39Ar eruption chronology, and their bearing on rhyolitic magma evolution in the Pleistocene Coso volcanic field, California
J. I. Simon, Jorge A. Vazquez, Axel K. Schmitt, Paul R. Renne, Charles R. Bacon, M. R. Reid
2009, Contributions to Mineralogy and Petrology (158) 421-446
We determined Ar/Ar eruption ages of eight extrusions from the Pleistocene Coso volcanic field, a long-lived series of small volume rhyolitic domes in eastern California. Combined with ion-microprobe dating of crystal ages of zircon and allanite from these lavas and from granophyre geothermal well cuttings, we were able to track...
Modeling cape- and ridge-associated marine sand deposits: A focus on the U.S. Atlantic Continental Shelf
James D. Bliss, S. Jeffress Williams, Karen S. Bolm
2009, Bulletin 2209-M
Cape- and ridge-associated marine sand deposits, which accumulate on storm-dominated continental shelves that are undergoing Holocene marine transgression, are particularly notable in a segment of the U.S. Atlantic Continental Shelf that extends southward from the east tip of Long Island, N.Y., and eastward from Cape May at the south end...
Summary and analysis of water-quality data for the Arrowwood National Wildlife Refuge, east-central North Dakota, 1987-2004
Karen R. Ryberg, Gregory Hiemenz
2009, Scientific Investigations Report 2009-5017
The Bureau of Reclamation collected water-quality samples at 16 sites on the James River and the Arrowwood National Wildlife Refuge, N. Dak., as part of its refuge-monitoring program from 1987-93 and as part of an environmental impact statement commitment from 1999-2004. Climatic and hydrologic conditions varied greatly during both sampling periods....
40Ar/39Ar dates for the Spanish Peaks intrusions in south-central Colorado
B.S. Penn, David A. Lindsey
2009, Rocky Mountain Geology (44) 17-32
A diverse suite of spatially and temporally juxtaposed igneous rocks ranging from alkaline lamprophyres to granites intruded south-central Colorado during late Oligocene and early Miocene time. In addition to the stocks of the East and West Spanish Peaks, there are three types of dikes exposed in the region, based on...
Surface rupture map of the 2002 M7.9 Denali fault earthquake, Alaska: Digital data
Peter J. Haeussler
2009, Data Series 422
The November 3, 2002, Mw7.9 Denali Fault earthquake produced about 340 km of surface rupture along the Susitna Glacier Thrust Fault and the right-lateral, strike-slip Denali and Totschunda Faults. Digital photogrammetric methods were primarily used to create a 1:500-scale, three-dimensional surface rupture map, and 1:6,000-scale aerial photographs were used for...
Mesozoic magmatism and base-metal mineralization in the Fortymile mining district, eastern Alaska — Initial results of petrographic, geochemical, and isotopic studies in the Mount Veta area
Cynthia Dusel-Bacon, John F. Slack, John N. Aleinikoff, James K. Mortensen
2009, Professional Paper 1760-A
We present here the initial results of a petrographic, geochemical, and isotopic study of Mesozoic intrusive rocks and spatially associated Zn-Pb-Ag-Cu-Au prospects in the Fortymile mining district in the southern Eagle quadrangle, Alaska. Analyzed samples include mineralized and unmineralized drill core from 2006 and 2007 exploration by Full Metal Minerals,...
Geography of Alaska lake districts: Identification, description, and analysis of lake-rich regions of a diverse and dynamic state
Christopher D. Arp, Benjamin M. Jones
2009, Scientific Investigations Report 2008-5215
Lakes are abundant landforms and important ecosystems in Alaska, but are unevenly distributed on the landscape with expansive lake-poor regions and several lake-rich regions. Such lake-rich areas are termed lake districts and have landscape characteristics that can be considered distinctive in similar respects to mountain ranges. In this report, we...
Three-dimensional numerical model of ground-water flow in northern Utah Valley, Utah County, Utah
Philip M. Gardner
2009, Scientific Investigations Report 2008-5049
A three-dimensional, finite-difference, numerical model was developed to simulate ground-water flow in northern Utah Valley, Utah. The model includes expanded areal boundaries as compared to a previous ground-water flow model of the valley and incorporates more than 20 years of additional hydrologic data. The model boundary was generally expanded to...
Radiocarbon ages and age models for the past 30,000 years in Bear Lake, Utah and Idaho
Steve M. Colman, Robert J. Rosenbauer, Darrell Kaufman, Walter E. Dean, John McGeehin
2009, GSA Special Papers (450) 133-144
Radiocarbon analyses of pollen, ostracodes, and total organic carbon (TOC) provide a reliable chronology for the sediments deposited in Bear Lake over the past 30,000 years. The differences in apparent age between TOC, pollen, and carbonate fractions are consistent and in accord with the origins of these fractions. Comparisons among...
Interacción termal entre magmas graníticos laramídicos y rocas encajonantes mesoproterozoicas: Historia de enfriamiento de intrusivos de la sierrita blanca, NW Sonora
Monica A. Enriquez-Castillo, Alexander Iriondo, Gabriel Chavez-Cabello, Michael J. Kunk
2009, Boletin de la Sociedad Geologica Mexicana (61) 451-483
A semi-quantitative thermochronological study, combining U-Pb and 40Ar/39Ar geochronology, has allowed assessment of the crystallization and cooling history of the Laramide Sierrita Blanca granite as well as the thermal effects resulting from the intrusion into the Mesoproterozoic host rocks (~1.1 Ga Murrieta granite). The U-Pb zircon age discrepancy between two samples...
Quaternary incision rates and drainage evolution of the Uncompahgre and Gunnison Rivers, western Colorado, as calibrated by the Lava Creek B ash
Andrew L. Darling, Karl E. Karlstrom, Andres Aslan, Rex D. Cole, Charles Betton, Elmira Wan
2009, Rocky Mountain Geology (44) 71-83
The Quaternary erosional history of western Colorado is documented in terraces of the Colorado, Gunnison, and Uncompahgre Rivers that contain the Lava Creek B ash (0.64 Ma). This paper reports an important new ash locality that dates ca. 100-m-high river gravels associated with the paleo-confluence of the Gunnison and Uncompahgre...
Hydrologic conditions and a firm-yield assessment for J.B. Converse Lake, Mobile County, Alabama, 1991-2006
Carl S. Carlson, Stacey A. Archfield
2009, Scientific Investigations Report 2008-5005
J.B. Converse (Converse) Lake is the primary source of drinking water for the city of Mobile, Alabama. Concerns regarding the ability of the reservoir to meet current and future water demands during drought conditions have prompted this study. The 1991 through 2006 water years included a drought that occurred during...
A water-leach procedure for estimating bioaccessibility of elements in soils from transects across the United States and Canada
Robert G. Garrett, G.E.M. Hall, J.E. Vaive, P. Pelchat
2009, Applied Geochemistry (24) 1438-1453
An objective of the North American Soil Geochemical Landscapes Project is to provide relevant data concerning bioaccessible concentrations of elements in soil to government and other institutions undertaking environmental studies. A protocol was developed that employs a 1-g soil sample agitated overnight with 40 mL of reverse-osmosis de-ionized water for...
IPANE: Could New England's Early Detection Network benefit eastern Canada?
Les Mehrhoff, Randy G. Westbrooks
2009, Conference Paper, Proceedings of the Weeds Across Borders 2008 Conference
The Invasive Plant Analysis of New England (IPANE: ipane.org) is a multifaceted approach to regional early detection of invasive plants. IPANE, was founded in 2001 to create a comprehensive six state New England regional partnership to: minimize the ecological damage caused by invasive plants; provide reliable and accessible educational material;...
Relative spatial soil geochemical variability along two transects across the United States and Canada
Robert G. Garrett
2009, Applied Geochemistry (24) 1405-1415
To support the development of protocols for the proposed North American Soil Geochemical Landscapes project, whose objective is to establish baselines for the geochemistry of North American soils, two continental-scale transects across the United States and Canada were sampled in 2004. The sampling employed a spatially stratified random sampling design...
Applications of a broad-spectrum tool for conservation and fisheries analysis: Aquatic gap analysis
James E. McKenna Jr., Paul J. Steen, John Lyons, Jana S. Stewart
2009, Gap Analysis Bulletin 44-51
Natural resources support all of our social and economic activities, as well as our biological existence. Humans have little control over most of the physical, biological, and sociological conditions dictating the status and capacity of natural resources in any particular area. However, the most rapid and threatening influences on natural...
Postmortem evaluation of reintroduced migratory Whooping Cranes in eastern North America
Gretchen A. Cole, Nancy Thomas, Marilyn Spaulding, Richard Stroud, Richard P. Urbanek, Barry K. Hartup
2009, Journal of Wildlife Diseases (45) 29-40
Reintroduction of endangered Whooping Cranes (Grus americana) in eastern North America has successfully established a migratory population between Wisconsin and Florida. Eighty birds (47 males, 33 females) were released between 2001 and 2006, and all birds were tracked following release with satellite and/or VHF monitoring devices. By the end of...
Earth's magnetic field complex: U.S. National activities during the Decade of Geopotential Field Research
Michael E. Purucker, T. Sabaka, W. Kuang, S. Maus, Jeffrey J. Love
2009, Conference Paper, ESA 2nd Swarm Int. Sci. Meeting
The US geomagnetism community is supported by NASA, NOAA, USGS, NSF, DOD, and US universities. During the Decade of Geopotential Field Research, inaugurated in 1999 with the launch of the Danish satellite Ørsted on a US rocket, the US community has been involved in satellite mission development and analysis, instrument...
Experimental geostatistical model of a continuous gas accumulation, Rocky Mountains, Utah
Ricardo A. Olea
2009, Conference Paper, Proceedings of the 2009 conference of the International Association for Mathematical Geosciences
No abstract available....
The Columbia River Basalt Group: from the gorge to the sea
Ray E. Wells, Alan R. Niem, Russell C. Evarts, Jonathan T. Hagstrum
2009, GSA Field Guides (15) 737-774
Miocene flood basalts of the Columbia River Basalt Group inundated eastern Washington, Oregon, and adjacent Idaho between 17 and 6 Ma. Some of the more voluminous flows followed the ancestral Columbia River across the Cascade arc, Puget-Willamette trough, and the Coast Range to the Pacific Ocean. We have used field...
Geologic columns for the ICDP-USGS Eyreville B core, Chesapeake Bay impact structure: Impactites and crystalline rocks, 1766 to 1096 m depth
J. Wright Horton Jr., R.L. Gibson, W.U. Reimold, A. Wittmann, Gregory Gohn, Lucy E. Edwards
2009, Special Paper of the Geological Society of America 21-49
The International Continental Scientific Drilling Program (ICDP)-U.S. Geological Survey (USGS) Eyreville drill cores from the Chesapeake Bay impact structure provide one of the most complete geologic sections ever obtained from an impact structure. This paper presents a series of geologic columns and descriptive lithologic information for the lower impactite and...
Facilitating adaptive management in the Chesapeake Bay Watershed through the use of online decision support tools
Cassandra Mullinx, Scott Phillips, Kelly Shenk, Paul Hearn, Olivia Devereux
2009, Conference Paper, Planning for an uncertain future - Monitoring, integration, and adaptation (SIR 2009-5049)
The Chesapeake Bay Program (CBP) is attempting to more strategically implement management actions to improve the health of the Nation’s largest estuary. In 2007 the U.S. Geological Survey (USGS) and U.S. Environmental Protection Agency (USEPA) CBP office began a joint effort to develop a suite of Internetaccessible decision-support tools and...
