Petroleum geochemistry of oil and gas from Barbados: Implications for distribution of Cretaceous source rocks and regional petroleum prospectivity
R.J. Hill, Christopher J. Schenk
2005, Marine and Petroleum Geology (22) 917-943
Petroleum produced from the Barbados accretionary prism (at Woodbourne Field on Barbados) is interpreted as generated from Cretaceous marine shale deposited under normal salinity and dysoxic conditions rather than from a Tertiary source rock as previously proposed. Barbados oils correlate with some oils from eastern Venezuela and Trinidad that are...
Specific conductance and water temperature data for San Francisco Bay, California, for Water Year 2004
P.A. Buchanan
2005, Interagency Ecological Program Newsletter (18) 2-6
This article presents time-series graphs of specificconductance and water-temperature data collected in San Francisco Bay during water year 2004 (October 1, 2003, through September 30, 2004). Specific-conductance and water-temperature data were recorded at 15-minute intervals at seven U.S. Geological Survey (USGS) locations (Figure 1, Table 1). Specific-conductance and water-temperature data...
Tools for assessing landscape-scale habitat changes in wetland restoration planning
M. Orr, C. May, P. Williams, M. Lionberger, D. Schoellhamer, S. Rottenborn, R. Duke, D. Stralberg, M. Herzog, S. Ritchie
2005, Conference Paper, Proceedings of the 7th biennial State-of-the-Estuary Conference
No abstract available....
Reconstructing a mid-Cretaceous landscape from paleosols in western Canada
David F. Ufnar, Luis A. Gonzalez, Greg A. Ludvigson, Richard L. Brenner, B.J. Witzke, D. Leckie
2005, Journal of Sedimentary Research (75) 984-996
The Albian Stage of the mid-Cretaceous was a time of equable climate conditions with high sea levels and broad shallow epeiric seas that may have had a moderating affect on continental climates. A Late Albian landscape surface that developed during a regression and subsequent sea-level rise in the Western Canada...
Multispectral imaging contributions to global land ice measurements from space
J.S. Kargel, M. J. Abrams, M.P. Bishop, A. Bush, G. Hamilton, H. Jiskoot, Andreas Kaab, H. H. Kieffer, E.M. Lee, F. Paul, F. Rau, B. Raup, J.F. Shroder, D. Soltesz, D. Stainforth, L. Stearns, R. Wessels
2005, Remote Sensing of Environment (99) 187-219
Global Land Ice Measurements from Space (GLIMS) is an international consortium established to acquire satellite images of the world's glaciers, analyse them for glacier extent and changes, and assess change data for causes and implications for people and the environment. Although GLIMS is making use of multiple remote-sensing systems, ASTER...
Northern Goshawk diet in Minnesota: An Analysis using video recording systems
B.L. Smithers, C. W. Boal, D. E. Andersen
2005, Journal of Raptor Research (39) 264-273
We used video-recording systems to collect diet information at 13 Northern Goshawk (Accipiter gentilis) nests in Minnesota during the 2000, 2001, and 2002 breeding seasons. We collected 4871 hr of video footage, from which 652 prey deliveries were recorded. The majority of prey deliveries identified were mammals (62%), whereas birds...
The South China sea margins: Implications for rifting contrasts
D.E. Hayes, S.S. Nissen
2005, Earth and Planetary Science Letters (237) 601-616
Implications regarding spatially complex continental rifting, crustal extension, and the subsequent evolution to seafloor spreading are re-examined for the northern and southern-rifted margins of the South China Sea. Previous seismic studies have shown dramatic differences in the present-day crustal thicknesses as the manifestations of the strain experienced during the rifting...
Use of soil moisture probes to estimate ground water recharge at an oil spill site
G. N. Delin, W.N. Herkelrath
2005, Journal of the American Water Resources Association (41) 1259-1277
Soil moisture data collected using an automated data logging system were used to estimate ground water recharge at a crude oil spill research site near Bemidji, Minnesota. Three different soil moisture probes were tested in the laboratory as well as the field conditions of limited power...
Contemporaneous trachyandesitic and calc-alkaline volcanism of the Huerto Andesite, San Juan Volcanic Field, Colorado, USA
F. Parat, M.A. Dungan, P. W. Lipman
2005, Journal of Petrology (46) 859-891
Locally, voluminous andesitic volcanism both preceded and followed large eruptions of silicic ash-flow tuff from many calderas in the San Juan volcanic field. The most voluminous post-collapse lava suite of the central San Juan caldera cluster is the 28 Ma Huerto Andesite, a diverse assemblage erupted from at least 5–6 volcanic...
Transboundary impacts on regional ground water modeling in Texas
K. Rainwater, J. Stovall, S. Frailey, L. Urban
2005, Conference Paper, Ground Water
Recent legislation required regional grassroots water resources planning across the entire state of Texas. The Texas Water Development Board (TWDB), the state's primary water resource planning agency, divided the state into 16 planning regions. Each planning group developed plans to manage both ground water and surface water sources and to...
Foraging location and site fidelity of the Double-crested Cormorant on Oneida Lake, New York
J.T.H. Coleman, M. E. Richmond, L. G. Rudstam, P.M. Mattison
2005, Waterbirds (28) 498-510
We studied the foraging behavior of the Double-crested Cormorant (Phalacrocorax auritus) on Oneida Lake, New York, by monitoring the activities of 27 radio-tagged birds in July and August of 1999 and 2000. A total of 224 locations were obtained of cormorants actively diving, and presumed foraging, at the time of...
Undersea landslides: Extent and significance in the Pacific Ocean, an update
H.J. Lee
2005, Natural Hazards and Earth System Sciences (5) 877-892
Submarine landslides are known to occur disproportionately in a limited number of environments including fjords, deltas, canyons, volcanic islands and the open continental slope. An evaluation of the progress that has been made in understanding Pacific Ocean submarine landslides over the last 15 years shows that mapping technologies have improved...
Anatahan, Northern Mariana Islands: Reconnaissance geological observations during and after the volcanic crisis of spring 1990, and monitoring prior to the May 2003 eruption
S.K. Rowland, J. P. Lockwood, F. A. Trusdell, R. B. Moore, M. K. Sako, R. Y. Koyanagi, G. Kojima
2005, Journal of Volcanology and Geothermal Research (146) 26-59
Anatahan island is 9.5 km east–west by 3.5 km north–south and truncated by an elongate caldera 5 km east–west by 2.5 km north–south. A steep-walled pit crater ∼1 km across and ∼200 m deep occupies the eastern part of the caldera. The island is the summit region of a mostly...
Iterative use of the Bruggeman-Hanai-Sen mixing model to determine water saturations in sand
R.H. Johnson, E. P. Poeter
2005, Geophysics (70)
The accuracy of the Bruggeman-Hanai-Sen (BHS) mixing model has been previously demonstrated for two-material mixtures during BHS model development. Using permittivities determined from modeling ground-penetrating radar (GPR) data, the BHS model has been iteratively applied to three-material mixtures of water, sand, and a dense, nonaqueous-phase liquid (DNAPL). However, the accuracy...
Seismic signature of a phreatic explosion: Hydrofracturing damage at Karthala volcano, Grande Comore Island, Indian Ocean
C. Savin, J.-R. Grasso, P. Bachelery
2005, Bulletin of Volcanology (67) 717-731
Karthala volcano is a basaltic shield volcano with an active hydrothermal system that forms the southern two-thirds of the Grande Comore Island, off the east coat of Africa, northwest of Madagascar. Since the start of volcano monitoring by the local volcano observatory in 1988, the July 11th, 1991 phreatic eruption...
Control of Fe(III) site occupancy on the rate and extent of microbial reduction of Fe(III) in nontronite
Deb P. Jaisi, R.K. Kukkadapu, D. D. Eberl, H. Dong
2005, Geochimica et Cosmochimica Acta (69) 5429-5440
A quantitative study was performed to understand how Fe(III) site occupancy controls Fe(III) bioreduction in nontronite by Shewanella putrefaciens CN32. NAu-1 and NAu-2 were nontronites and contained Fe(III) in different structural sites with 16 and 23% total iron (w/w), respectively, with almost all iron as Fe(III). Mo??ssbauer spectroscopy showed that...
Biology and conservation of Xantus's Murrelet: Discovery, taxonomy and distribution
Harry R. Carter, Spencer G. Sealy, Esther E. Burkett, John F. Piatt
2005, Marine Ornithology: Journal of Seabird Research and Conservation (33) 81-87
The biology of Xantus's Murrelets Synthliboramphus hypoleucus is similar in many respects to better-studied Ancient Murrelets S. antiquus, especially regarding morphology and the species' precocial mode of post-hatching development. It nests mainly in rock crevices but also under shrubs on islands in southern California, United States, and northwestern Baja California,...
Precipitation, density, and population dynamics of desert bighorn sheep on San Andres National Wildlife Refuge, New Mexico
Louis C. Bender, M.E. Weisenberger
2005, Wildlife Society Bulletin (33) 956-964
Understanding the determinants of population size and performance for desert bighorn sheep (Ovis canadensis mexicana) is critical to develop effective recovery and management strategies. In arid environments, plant communities and consequently herbivore populations are strongly dependent upon precipitation, which is highly variable seasonally and annually. We conducted a retrospective exploratory...
Hydrologic changes in urban streams and their ecological significance
C.P. Konrad, D. B. Booth
2005, American Fisheries Society Symposium (2005) 157-177
Urban development modifies the production and delivery of runoff to streams and the resulting rate, volume, and timing of streamflow. Given that streamflow demonstrably influences the structure and composition of lotic communities, we have identified four hydrologic changes resulting from urban development that are potentially significant to stream ecosystems: increased...
Carbon sequestration potential estimates with changes in land use and tillage practice in Ohio, USA
Z. Tan, R. Lal
2005, Agriculture, Ecosystems and Environment (111) 140-152
Soil C sequestration through changes in land use and management is one of the important strategies to mitigate the global greenhouse effect. This study was conducted to estimate C sequestration potential of the top 20 cm depth of soil for two scenarios in Ohio, USA: (1) with reforestation of both current...
The effects of earthquake measurement concepts and magnitude anchoring on individuals' perceptions of earthquake risk
R. Celsi, M. Wolfinbarger, D. Wald
2005, Earthquake Spectra (21) 987-1008
The purpose of this research is to explore earthquake risk perceptions in California. Specifically, we examine the risk beliefs, feelings, and experiences of lay, professional, and expert individuals to explore how risk is perceived and how risk perceptions are formed relative to earthquakes. Our results indicate that individuals tend to...
Tamarisk tensions
Patrick B. Shafroth
2005, BioScience (55) 821-821
In the August 2005 feature article, “Tiff over Tamarisk: Can a Nuisance Be Nice, Too?” the author raises several issues about which there is currently scientific debate, and presents some of the differing perspectives. A phenomenon surrounding discussions of tamarisk in the West is revealed and reinforced in the article—the...
Endemic arsenosis caused by indoor combustion of high-As coal in Guizhou Province, P.R. China
Z. Baoshan, W. Binbin, D. Zhenhua, Z. Daixing, Z. Yunshu, Z. Chen, C. Chaochang, R. B. Finkelman
2005, Environmental Geochemistry and Health (27) 521-528
The arsenic (As) content of coal relating with mineralization of gold in Southwest Guizhou Province, China is up to 35,000 ppm. The coal is burned indoors in open pits for daily cooking and crop drying. As a result, arsenic is precipitated and concentrated in corn (5-20 ppm), chili (100-800 ppm)...
The evolution of fledging age in songbirds
D.A. Roff, V. Remes, T. E. Martin
2005, Journal of Evolutionary Biology (18) 1425-1433
In birds with altricial young an important stage in the life history is the age at fledging. In this paper we use an approach proven successful in the prediction of the optimal age at maturity in fish and reptiles to predict the optimal age of fledging in passerines. Integrating the...
Retreating glacier fronts on the Antarctic Peninsula over the past half-century
A.J. Cook, A.J. Fox, D.G. Vaughan, J.G. Ferrigno
2005, Science (308) 541-544
The continued retreat of ice shelves on the Antarctic Peninsula has been widely attributed to recent atmospheric warming, but there is little published work describing changes in glacier margin positions. We present trends in 244 marine glacier fronts on the peninsula and associated islands over the past 61 years. Of...
