Development of regional liquefaction-induced deformation hazard maps
A. Rosinski, Kathy L. Knudsen, J. Wu, R.B. Seed, C.R. Real
Yegian M.K.Kavazanjian E., editor(s)
2004, Conference Paper, Geotechnical Special Publication
This paper describes part of a project to assess the feasibility of producing regional (1:24,000-scale) liquefaction hazard maps that are based-on potential liquefaction-induced deformation. The study area is the central Santa Clara Valley, at the south end of San Francisco Bay in Central California. The information collected and used includes:...
Geophysical and isotopic mapping of preexisting crustal structures that influenced the location and development of the San Jacinto fault zone, southern California
V.E. Langenheim, R.C. Jachens, D. M. Morton, R. W. Kistler, J. C. Matti
2004, Geological Society of America Bulletin (116) 1143-1157
We examine the role of preexisting crustal structure within the Peninsular Ranges batholith on determining the location of the San Jacinto fault zone by analysis of geophysical anomalies and initial strontium ratio data. A 1000-km-long boundary within the Peninsular Ranges batholith, separating relatively mafic, dense, and magnetic rocks of the...
Evidence for increased latent heat transport during the Cretaceous (Albian) greenhouse warming
David F. Ufnar, Luis A. Gonzalez, Greg A. Ludvigson, Richard L. Brenner, B.J. Witzke
2004, Geology (32) 1049-1052
Quantitative estimates of increased heat transfer by atmospheric H 2O vapor during the Albian greenhouse warming suggest that the intensified hydrologic cycle played a greater role in warming high latitudes than at present and thus represents a viable alternative to oceanic heat transport. Sphaerosiderite ??18O values in paleosols of the...
Burrowing mayflies (Hexagenia) as indicators of aquatic ecosystem health at Sleeping Bear Dunes National Lakeshore, Michigan
T.A. Edsall, W.E. Phillips
2004, Park Science (23)
With concern running high for the ecological effects of nutrient introductions in waters near the park, researchers document baseline conditions of aquatic park resources, applying a method that can be fine-tuned for future trend monitoring....
Hydraulic tests in highly permeable aquifers
James J. Butler Jr., Xiaoyong Zhan
2004, Water Resources Research (40)
A semianalytical solution is presented for a mathematical model describing the flow of groundwater in response to a slug or pumping test in a highly permeable, confined aquifer. This solution, which is appropriate for wells of any degree of penetration and incorporates inertial mechanisms at both the test and observation...
Estimating functional connectivity of wildlife habitat and its relevance to ecological risk assessment
A.R. Johnson, Craig R. Allen, K.A.N. Simpson
Lawrence Kapustka, Gregory R. Biddinger, Matthew Luxon, Hector Galbraith, editor(s)
2004, ASTM Selected Technical Papers STP1458
Habitat fragmentation is a major threat to the viability of wildlife populations and the maintenance of biodiversity. Fragmentation relates to the sub-division of habitat into disjunct patches. Usually coincident with fragmentation per se is loss of habitat, a reduction in the size of the remnant patches, and increasing distance between patches. Natural...
Frequency-dependent Lg Q within the continental United States
D. Erickson, D.E. McNamara, H.M. Benz
2004, Bulletin of the Seismological Society of America (94) 1630-1643
Frequency-dependent crustal attenuation (1/Q) is determined for seven distinct physiographic/tectonic regions of the continental United States using high-quality Lg waveforms recorded on broadband stations in the frequency band 0.5 to 16 Hz. Lg attenuation is determined from time-domain amplitude measurements in one-octave frequency bands centered on the frequencies 0.75, 1.0,...
An experimental demonstration of stem damage as a predictor of fire-caused mortality for ponderosa pine
P. van Mantgem, M. Schwartz
2004, Canadian Journal of Forest Research (34) 1343-1347
We subjected 159 small ponderosa pine (Pinus ponderosa Dougl. ex P. & C. Laws.) to treatments designed to test the relative importance of stem damage as a predictor of postfire mortality. The treatments consisted of a group with the basal bark artificially thinned, a second group with fuels removed from...
Delineation and evaluation of hydrologic-landscape regions in the United States using geographic information system tools and multivariate statistical analyses.
David M. Wolock, Thomas C. Winter, Gerard McMahon
2004, Environmental Management (34) S71-S88
Hydrologic-landscape regions in the United States were delineated by using geographic information system (GIS) tools combined with principal components and cluster analyses. The GIS and statistical analyses were applied to land-surface form, geologic texture (permeability of the soil and bedrock), and climate variables that describe the physical and climatic setting...
Effects of radiotransmitters on the reproductive performance of Cassin's auklets
Joshua T. Ackerman, Josh Adams, John Y. Takekawa, Harry R. Carter, Darrell L. Whitworth, Scott H. Newman, Richard T. Golightly, Dennis L. Orthmeyer
2004, Wildlife Society Bulletin (32) 1229-1241
We examined whether radiotransmitters adversely affected the reproductive performance of Cassin's auklets (Ptychoramphus aleuticus) breeding on the California Channel Islands during 1999-2001. We attached external radiotransmitters to 1 partner in 108 Cassin's auklet pairs after nest initiation and used 131 unmarked, but handled, pairs as controls. Compared to alpha chicks...
Sulfur and oxygen isotopes in barite deposits of the western Brooks Range, Alaska, and implications for the origin of the Red Dog massive sulfide deposits
C. A. Johnson, K.D. Kelley, D. L. Leach
2004, Economic Geology (99) 1435-1448
Sulfur and oxygen isotope analyses have been obtained for barite samples from the giant stratiform sulfide barite deposits at Red Dog in the western Brooks Range of Alaska, from stratiform barite deposits elsewhere in the Red Dog district, and from stratiform and vein and breccia barite occurrences in the central...
Overwintered Bullfrog tadpoles negatively affect Salamanders and Anurans in native amphibian communities
M.D. Boone, E. E. Little, R. D. Semlitsch
2004, Copeia 683-690
We examined the interactive effects of overwintered Bullfrog (Rana catesbeiana) tadpoles and pond hydroperiod on a community of larval amphibians in outdoor mesocosms including American Toads (Bufo americanus), Southern Leopard Frogs (Rana sphenocephala), and Spotted Salamanders (Ambystoma maculatum) - species within the native range of Bullfrogs. Spotted Salamanders and Southern...
Modes of occurrence of mercury and other trace elements in coals from the warrior field, Black Warrior Basin, Northwestern Alabama
S. F. Diehl, M. B. Goldhaber, J. R. Hatch
2004, International Journal of Coal Geology (59) 193-208
The mineralogic residence and abundance of trace metals is an important environmental issue. Data from the USGS coal quality database show that potentially toxic elements, including Hg, As, Mo, Se, Cu, and Tl are enriched in a subset of coal samples in the Black Warrior Basin of Alabama, USA. Although...
Annual survival estimation of migratory songbirds confounded by incomplete breeding site-fidelity: Study designs that may help
M.R. Marshall, Duane R. Diefenbach, L.A. Wood, R.J. Cooper
2004, Animal Biodiversity and Conservation (27) 59-72
Many species of bird exhibit varying degrees of site-fidelity to the previous year's territory or breeding area, a phenomenon we refer to as incomplete breeding site-fidelity. If the territory they occupy is located beyond the bounds of the study area or search area (i.e., they have emigrated from the study...
Physical habitat and sediment in the lower Virgin River
R.T. Milhous
Sehlke G.Hayes D.F.Stevens D.K., editor(s)
2004, Conference Paper, Proceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management
The Virgin River in southwestern Utah and adjacent Arizona and Nevada is habitat for a number of endangered and threatened species of fish. The river also has significant loads of sediment that change the characteristic of the stream channel with time. The Virgin River transports large quantities of sand. Some...
Fish-habitat modeling for gap analysis to conserve the endangered Topeka shiner (Notropis topeka)
S.S. Wall, C. R. Berry Jr., C.M. Blausey, J.A. Jenks, C.J. Kopplin
2004, Canadian Journal of Fisheries and Aquatic Sciences (61) 954-973
Decision support tools that predict fish distribution over broad spatial scales are needed to assist in planning watershed management and endangered species recovery. We developed a geographical information system model with multivariate logistic regression to rank valley segments for probable occurrence of the endangered Topeka shiner (Notropis topeka) using stream...
Sustaining salmonid populations: A caring understanding of naturalness of taxa
Jennifer L. Nielsen, Henry A. Regier
E. Eric Knudsen, editor(s)
2004, Conference Paper, Sustainable management of North American fisheries: American Fisheries Society Symposium 43
Species of the family of Salmonidae occur naturally in Northern Hemisphere waters that remain clear and cool to cold in summer. For purposes of reproduction, salmonids generally behaviorally respond to the currents of streams and lakes in recently glaciated areas. For feeding and maturation, many larger species migrate into existing...
Water loss in the Potomac River basin during droughts
E.R. Hagen, J.E. Kiang, J.J.A. Dillow
Sehlke G.Hayes D.F.Stevens D.K., editor(s)
2004, Conference Paper, Proceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management
The water loss phenomena in the Washington DC metropoliton area's (WMA) Potomac River water supply basin during droughts was analyzed. Gage errors, permitted withdrawals, evaporation, and transpiration by trees along the river were investigated to account for loss. The Interstate Commission on the Potomac River Basin (ICPRB) calculated potential gage...
Cassini/VIMS observation of an Io post-eclipse brightening event
G. Bellucci, E. D’Aversa, V. Formisano, D. Cruikshank, R.M. Nelson, R. N. Clark, K. H. Baines, D. Matson, R. H. Brown, T. B. McCord, B. J. Buratti, P. D. Nicholson
2004, Icarus (172) 141-148
During the Cassini-Jupiter flyby, VIMS observed Io at different phase angles, both in full sunlight and in eclipse. By using the sunlight measurements, we were able to produce phase curves in the visual through all the near infrared wavelengths covered by the VIMS instrument (0.85-5.1 ??m). The phase angle spanned...
Tectonics and metallogenesis of Proterozoic rocks of the Reading Prong
L.C.S. Gundersen
2004, Journal of Geodynamics (37) 361-379
Detailed geologic mapping, petrography, and major and trace-element analyses of Proterozoic rocks from the Greenwood Lake Quadrangle, New York are compared with chemical analyses and stratigraphic information compiled for the entire Reading Prong. A persistent regional stratigraphy is evident in the mapped area whose geochemistry indicates protoliths consistent with a...
Age and growth of flathead catfish, Pylodictus olivaris rafinesque, in the Altamaha River system, Georgia
T.B. Grabowski, J. Jeffery Isely, R.R. Weller
2004, Journal of Freshwater Ecology (19) 411-417
Flathead catfish were introduced to the Altamaha River system, Georgia in the 1970's. We determined the length-weight relationship, Von Bertalanffy growth parameters, and back calculated lengths by examining the sagittal otoliths of 331 individuals captured from this population. We found that there were no sex related differences in length weight...
Effects of the benthic cyanobacterium Lyngbya majuscula on larval recruitment of the reef corals Acropora surculosa and Pocillopora damicornis
I. B. Kuffner, V.J. Paul
2004, Coral Reefs (23) 455-458
[No abstract available]...
Assessing the toxicity and teratogenicity of pond water in north-central Minnesota to amphibians
Christine M. Bridges, Edward Little, David Gardiner, James Petty, James Huckins
2004, Environmental Science and Pollution Research (11) 233-239
BackgroundIncidence of amphibian deformities have increased in recent years, especially in the northern region of the United States. While many factors have been proposed as being responsible for generating deformities (e.g., contaminants, ultraviolet radiation [UV], parasites), no single cause has been definitively established.Methods<p...
US Rockies gas focus points up need for access, risk takers, infrastructure
M.R. Thomasson, P.E. Belanger, L. Cook
2004, Oil & Gas Journal (102)
The last 20 yr of the Rocky Mountains oil and gas exploration and production business have been turbulent. Most of the major companies have left; they have been replaced with, independents and small to larger private and public companies. Natural gas become the primary focus of exploration. A discussion covers...
A high resolution record of chlorine-36 nuclear-weapons-tests fallout from Central Asia
J.R. Green, L.D. Cecil, H.-A. Synal, J. Santos, K.J. Kreutz, C.P. Wake
2004, Conference Paper, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
The Inilchek Glacier, located in the Tien Shan Mountains, central Asia, is unique among mid-latitude glaciers because of its relatively large average annual accumulation. In July 2000, two ice cores of 162 and 167 meters (m) in length were collected from the Inilchek Glacier for (chlorine-36) 36Cl analysis a part...
