Testing the concept of drift shadow at Yucca Mountain, Nevada
J.B. Paces, L.A. Neymark, T. Ghezzehei, P.F. Dobson
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
If proven, the concept of drift shadow, a zone of reduced water content and slower ground-water travel time beneath openings in fractured rock of the unsaturated zone, may increase performance of a proposed geologic repository for high-level radioactive waste at Yucca Mountain, To test this concept under natural-flow conditions present...
Ecology of an estuarine mysid shrimp in the Columbia River (USA)
C. A. Haskell, J. A. Stanford
2006, River Research and Applications (22) 739-753
The estuarine mysid, Neomysis mercedis, has colonized John Day and other run-of-the-river Reservoirs of the Columbia River, over 400 km from the estuary. In John Day Reservoir N. mercedis numbers peaked (2 m-3) in August in areas near the dam in association with lower water velocity and softer bottom than...
Evaluation of the persistence of micropollutants through pure-oxygen activated sludge nitrification and denitrification
A.D. Levine, M. T. Meyer, G. Kish
2006, Water Environment Research (78) 2276-2285
The persistence of pharmaceuticals, hormones, and household and industrial chemicals through a pure-oxygen activated sludge, nitrification, denitrification wastewater treatment facility was evaluated. Of the 125 micropollutants that were tested in this study, 55 compounds were detected in the untreated wastewater, and 27 compounds were detected in the disinfected effluent. The...
Adsorption site analysis of impurity embedded single-walled carbon nanotube bundles
S. Agnihotri, J.P.B. Mota, M. Rostam-Abadi, M.J. Rood
2006, Carbon (44) 2376-2383
Bundle morphology and adsorptive contributions from nanotubes and impurities are studied both experimentally and by simulation using a computer-aided methodology, which employs a small physisorbed probe molecule to explore the porosity of nanotube samples. Grand canonical Monte Carlo simulation of nitrogen adsorption on localized sites of a bundle is carried...
Environmental contaminants in fish and their associated risk to piscivorous wildlife in the Yukon River Basin, Alaska
J.E. Hinck, C. J. Schmitt, K. R. Echols, T.W. May, C.E. Orazio, D. E. Tillitt
2006, Archives of Environmental Contamination and Toxicology (51) 661-672
Organochlorine chemical residues and elemental contaminants were measured in northern pike (Esox lucius), longnose sucker (Catostomus catostomus), and burbot (Lota lota) from 10 sites in the Yukon River Basin (YRB) during 2002. Contaminant concentrations were compared to historical YRB data and to toxicity thresholds for fish and piscivorous wildlife from...
AFS men and women differ most in their lifestyle choices
N.A. Connelly, T.L. Brown, J.M. Hardiman
2006, Fisheries (31) 503-506
The American Fisheries Society sponsored a survey to examine the career development choices of men and women and how they might differ by gender. A random sample of 700 men and 700 women was selected from the AFS membership database. The survey was mailed out in October 2004 and 991...
Afghan resource assessment fed positive outlook for exploration
T. R. Klett, C. J. Wandrey, G. F. Ulmishek, A. Amirzada
2006, Oil & Gas Journal (104)
Crude oil, natural gas and natural gas liquids/condensate resources are important for the redevelopment of Afghanistan's infrastructure. Improved living and economic conditions in Afghanistan require increasing the availability of energy particularly by exploitation of Afghanistan's petroleum resources. The four total petroleum systems are subdivided into units with homogeneous geologic traits...
The colloidal thyroxine (T4) ring as a novel biomarker of perchlorate exposure in the African clawed frog Xenopus laevis
F. Hu, Bibek Sharma, S. Mukhi, R. Patino, J.A. Carr
2006, Toxicological Sciences (93) 268-277
The purpose of this study was to determine if changes in colloidal thyroxine (T4) immunoreactivity can be used as a biomarker of perchlorate exposure in amphibian thyroid tissue. Larval African clawed frogs (Xenopus laevis) were exposed to 0, 1, 8, 93, and 1131 ??g perchlorate/l for 38 and 69 days...
Two models for evaluating landslide hazards
J.C. Davis, C.-J. Chung, G.C. Ohlmacher
2006, Computers & Geosciences (32) 1120-1127
Two alternative procedures for estimating landslide hazards were evaluated using data on topographic digital elevation models (DEMs) and bedrock lithologies in an area adjacent to the Missouri River in Atchison County, Kansas, USA. The two procedures are based on the likelihood ratio model but utilize different assumptions. The empirical likelihood...
CO2 sequestration: Storage capacity guideline needed
S.M. Frailey, R.J. Finley, T.S. Hickman
2006, Oil & Gas Journal (104)
Petroleum reserves are classified for the assessment of available supplies by governmental agencies, management of business processes for achieving exploration and production efficiency, and documentation of the value of reserves and resources in financial statements. Up to the present however, the storage capacity determinations made by some organizations in the...
Bedrock formation at Meridiani Planum
S. W. Squyres, O. Aharonson, R. E. Arvidson, J.F. Bell III, P. R. Christensen, B. C. Clark, J.A. Crisp, W. Farrand, T. Glotch, M.P. Golombek, J. Grant, J. Grotzinger, Kenneth E. Herkenhoff, J. R. Johnson, B.L. Jolliff, A.H. Knoll, S. M. McLennan, H.Y. McSween, Johnnie N. Moore, J. W. Rice Jr., N. Tosca
2006, Nature (443) E1-E2
The Mars Exploration Rover Opportunity discovered sulphate-rich sedimentary rocks at Meridiani Planum on Mars, which are interpreted by McCollom and Hynek as altered volcanic rocks. However, their conclusions are derived from an incorrect representation of our depositional model, which is upheld by more recent Rover data. We contend that all the...
Mapping of Titan: Results from the first Titan radar passes
E. R. Stofan, J. I. Lunine, R. Lopes, F. Paganelli, R. D. Lorenz, C. A. Wood, Randolph L. Kirk, S. Wall, C. Elachi, Laurence A. Soderblom, S. Ostro, M. Janssen, J. Radebaugh, L. Wye, H. Zebker, Y. Anderson, M. Allison, R. Boehmer, P. Callahan, P. Encrenaz, E. Flamini, G. Francescetti, Y. Gim, G. Hamilton, S. Hensley, W.T.K. Johnson, K. Kelleher, D. Muhleman, G. Picardi, F. Posa, L. Roth, R. Seu, S. Shaffer, B. Stiles, S. Vetrella, R. West
2006, Icarus (185) 443-456
The first two swaths collected by Cassini's Titan Radar Mapper were obtained in October of 2004 (Ta) and February of 2005 (T3). The Ta swath provides evidence for cryovolcanic processes, the possible occurrence of fluvial channels and lakes, and some tectonic activity. The T3 swath has extensive areas of dunes...
Analogues as a check of predicted drift stability at Yucca Mountain, Nevada
J. S. Stuckless
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Calculations made by the U.S. Department of Energy's Yucca Mountain Project as part of the licensing of a proposed geologic repository in southwestern Nevada for the disposal of high-level radioactive waste, predict that emplacement tunnels will remain open with little collapse long after ground support has disintegrated. This conclusion includes...
Hydroacoustic estimation of zooplankton biomass at two shoal complexes in the Apostle Islands Region of Lake Superior
B.V. Holbrook, T.R. Hrabik, D.K. Branstrator, D.L. Yule, J.D. Stockwell
2006, Journal of Great Lakes Research (32) 680-696
Hydroacoustics can be used to assess zooplankton populations, however, backscatter must be scaled to be biologically meaningful. In this study, we used a general model to correlate site-specific hydroacoustic backscatter with zooplankton dry weight biomass estimated from net tows. The relationship between zooplankton dry weight and backscatter was significant (p...
A survey of chemical constituents in National Fish Hatchery fish feed
Alec G. Maule, Ann Gannam, Jay Davis
2006, Report
Recent studies have demonstrated that various fish feeds contain significant concentrations of contaminants, many of which can bioaccumulate and bioconcentrate in fish. It appears that numerous organochlorine (OC) contaminants are present in the fish oils and fish meals used in feed manufacture, and some researchers speculate that all fish feeds...
Life history, ecology and population viability analysis of the Independence Lake strain Lahontan Cutthroat trout
P.H. Rissler, G.G. Scoppettone, S. Shea
2006, Report
n/a...
Fault dating in the Canadian Rocky Mountains: Evidence for late Cretaceous and early Eocene orogenic pulses
B.A. van der Pluijm, P.J. Vrolijk, D.R. Pevear, C.M. Hall, J. Solum
2006, Geology (34) 837-840
Fault rocks from the classic Rocky Mountain foreland fold-and-thrust belt in south-western Canada were dated by Ar analysis of clay grain-size fractions. Using X-ray diffraction quantification of the detrital and authigenic component of each fraction, these determinations give ages for individual faults in the area (illite age analysis). The resulting...
Improving the precision of otolith-based age estimates for Greenland halibut (Reinhardtius hippoglossoides) with preparation methods adapted for fragile sagittae
J.L. Gregg, D.M. Anderl, D.K. Kimura
2006, Fishery Bulletin (104) 643-648
[No abstract available]...
A reexamination of the Sudbury landing
D.S. Ross
2006, Icarus (183) 233-234
The arrival of the massive body that led to the Sudbury impact structure has been interpreted as a relatively gentle event, with temperatures not exceeding 1300 K on the basis of the presence of fullerene-caged helium. Such temperatures are well below the 10,000 K peaks suggested in large impact modeling,...
Late Quaternary eolian dust in surficial deposits of a Colorado Plateau grassland: Controls on distribution and ecologic effects
R. L. Reynolds, M.C. Reheis, J. C. Neff, H. Goldstein, J. Yount
2006, Catena (66) 251-266
In a semi-arid, upland setting on the Colorado Plateau that is underlain by nutrient-poor Paleozoic eolian sandstone, alternating episodes of dune activity and soil formation during the late Pleistocene and Holocene have produced dominantly sandy deposits that support grass and shrub communities. These deposits also contain eolian dust, especially in...
Benthic foraminiferal assemblages in Osaka Bay, southwestern Japan: Faunal changes over the last 50 years
Akira Tsujimoto, Ritsuo Nomura, Moriaki Yasuhara, Shusaku Yoshikawa
2006, Paleontological Research (10) 141-161
Live benthic foraminiferal assemblages from surface sediment in Osaka Bay collected in 1999 were analyzed to characterize the distribution of the modern foraminiferal assemblages. Foraminiferal assemblages were compared with those of previous studies to document environmental changes in Osaka Bay over the past 50 years. Sixty-one species of foraminifera belonging...
Urine-marking and ground-scratching by free-ranging Arctic Wolves, Canis lupus arctos, in summer
L.D. Mech
2006, Canadian Field-Naturalist (120) 466-470
Urine-marking and ground-scratching were observed in an Arctic Wolf (Canis lupus) pack on Ellesmere Island, Nunavut, Canada, during 16 summers between 1986 and 2005. All previously known urination postures and ground-scratching by breeding males and females were seen, and incidence of marking and scratching was greatest when non-pack wolves were...
Does life history predict risk-taking behavior of wintering dabbling ducks?
Joshua T. Ackerman, J.M. Eadie, T.G. Moore
2006, Condor (108) 530-546
Life-history theory predicts that longer-lived, less fecund species should take fewer risks when exposed to predation than shorter-lived, more fecund species. We tested this prediction for seven species of dabbling ducks (Anas) by measuring the approach behavior (behavior of ducks when approaching potential landing sites) of 1099 duck flocks during...
Seismic imaging of deep low-velocity zone beneath the Dead Sea basin and transform fault: Implications for strain localization and crustal rigidity
Uri S. ten Brink, A. S. Al-Zoubi, C.H. Flores, Y. Rotstein, I. Qabbani, S.H. Harder, Gordon R. Keller
2006, Geophysical Research Letters (33)
New seismic observations from the Dead Sea basin (DSB), a large pull-apart basin along the Dead Sea transform (DST) plate boundary, show a low velocity zone extending to a depth of 18 km under the basin. The lower crust and Moho are not perturbed. These observations are incompatible with the...
Crustal insights from gravity and aeromagnetic analysis: Central North Slope, Alaska
R. W. Saltus, C. J. Potter, J. D. Phillips
2006, American Association of Petroleum Geologists Bulletin (90) 1495-1517
Aeromagnetic and gravity data are processed and interpreted to reveal deep and shallow information about the crustal structure of the central North Slope, Alaska. Regional aeromagnetic anomalies primarily reflect deep crustal features. Regional gravity anomalies are more complex and require detailed analysis. We constrain our geophysical models with seismic data...
