Coal compositional changes along a mire interior to mire margin transect in the Mary Lee coal bed, Warrior Basin, Alabama, USA
C.F. Eble, Robert A. Gastaldo, T.M. Demko, Yajing Liu
1994, International Journal of Coal Geology (26) 43-62
Vertical increment samples of the Mary Lee coal bed, collected along an inferred mire interior to mire margin transect, were studied palynologically, petrographically and geochemically to determine if any vertical or lateral changes in coal composition could be detected. Results show...
A pore-pressure diffusion model for estimating landslide-inducing rainfall
M.E. Reid
1994, Journal of Geology (102) 709-717
Many types of landslide movement are induced by large rainstorms, and empirical rainfall intensity/duration thresholds for initiating movement have been determined for various parts of the world. In this paper, I present a simple pressure diffusion model that provides a physically based...
Re-Os isotopic evidence for an enriched-mantle source for the Noril'sk-type, ore-bearing intrusions, Siberia
R.J. Walker, J. W. Morgan, M.F. Horan, G.K. Czamanske, E.J. Krogstad, V.A. Fedorenko, V.E. Kunilov
1994, Geochimica et Cosmochimica Acta (58) 4179-4197
Magmatic Cu-Ni sulfide ores and spatially associated ultramafic and mafic rocks from the Noril'sk I, Talnakh, and Kharaelakh intrusions are examined for Re-Os isotopic systematics. Neodymium and lead isotopic data also are reported for the ultramafic and mafic rocks. The Re-Os data for most samples indicate closed-system behavior since the...
Tectonics and geology of spreading ridge subduction at the Chile Triple Junction: a synthesis of results from Leg 141 of the Ocean Drilling Program
J.H. Behrmann, S.D. Lewis, S.C. Cande
1994, Geologische Rundschau (83) 832-852
An active oceanic spreading ridge is being subducted beneath the South American continent at the Chile Triple Junction. This process has played a major part in the evolution of most of the continental margins that border the Pacific Ocean basin. A combination of high resolution swath bathymetric maps, seismic reflection...
Bottom stress estimates and sand transport on northern California inner continental shelf
David A. Cacchione, David E. Drake, Joanne T. Ferreira, George B. Tate
1994, Continental Shelf Research (14) 1273-1289
Measurements of velocities and light transmission in the bottom boundary layer on the continental shelf off northern California demonstrate the importance of storms in the transport of sediment along the coast and offshore in this region. Time-series estimates of bottom stress obtained from a combined wave-current bottom boundary layer model...
Diurnal-period currents trapped above Fieberling Guyot: observed characteristics and model comparisons
M.A. Noble, K.H. Brink, C.C. Eriksen
1994, Deep-Sea Research Part I: Oceanographic Research Papers (41) 643-658
Current measurements at depths of 19, 115, 264 and 464 m above the summit of Fieberling Guyot (32??28???N, 127??47???W) for 13 months in 1989 show that the diurnal tides are strongly amplified. The measured variances for K1, P1 and O1 at the 115 m depth were 810, 140 and 80...
Bioaccumulation of selenium from natural geologic sources in western states and its potential consequences
T. S. Presser, M. A. Sylvester, W. H. Low
1994, Environmental Management (18) 423-436
Ecological impacts of water-quality problems have developed in the western United States resulting from the disposal of seleniferous agricultural wastewater in wetland areas. Overt effects of selenium toxicosis occurred at five areas where deformities of wild aquatic birds were similar to those first observed at Kesterson National Wildlife Refuge in...
Classification properties of Holocene sediment in Shelikof Strait, Alaska
M. A. Hampton
1994, Marine Georesources and Geotechnology (12) 237-257
A textural sorting pattern is evident, with pronounced and regular changes in sand content throughout the strait but with consistent separation of silt from clay only at the lowest sand contents. Vane shear strength values fall in the very soft to medium range. They are best predicted by the amount...
US North Slope gas and Asian LNG markets
E. D. Attanasi
1994, Resources Policy (20) 247-255
Prospects for export of liquified natural gas (LNG) from Alaska's North Slope are assessed. Projected market conditions to 2010 show that new LNG capacity beyond announced expansions will be needed to meet regional demand and that supplies will probably come from outside the region. The estimated delivered costs of likely...
The importance of earthquake-induced landslides to long-term slope erosion and slope-failure hazards in seismically active regions
D. K. Keefer
1994, Geomorphology (10) 265-284
This paper describes a general method for determining the amount of earthquake-induced landsliding that occurs in a seismically active region over time; this determination can be used as a quantitative measure of the long-term hazard from seismically triggered landslides as well as a measure of the importance of this process...
Large mid-Holocene and late Pleistocene earthquakes on the Oquirrh fault zone, Utah
S.S. Olig, W.R. Lund, B.D. Black
1994, Geomorphology (10) 285-315
The Oquirrh fault zone is a range-front normal fault that bounds the east side of Tooele Valley and it has long been recognized as a potential source for large earthquakes that pose a significant hazard to population centers along the Wasatch Front...
Flow and chloride transport in the tidal Hudson River, NY
Lawrence A. Weiss, Raymond W. Schaffranek, M. Peter de Vries
1994, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
A one-dimensional dynamic-flow model and a one-dimensional solute-transport model were used to evaluate the effects of hypothetical public-supply water withdrawals on saltwater intrusion in a 133-mile reach of the tidal Hudson River between Green Island dam, near Troy, N.Y., and Hastings-on-Hudson, N.Y. Regression techniques were used in analyses of current...
Geochemistry of the 1989-1990 eruption of redoubt volcano: Part II. Evidence from mineral and glass chemistry
S.E. Swanson, C.J. Nye, T. P. Miller, V.F. Avery
1994, Journal of Volcanology and Geothermal Research (62) 453-468
Early stages (December 1989) of the 1989-1990 eruption of Redoubt Volcano produced two distinct lavas. Both lavas are high-silica andesites with a narrow range of bulk composition (58-64 wt.%) and similar mineralogies (phenocrysts of plagioclase, hornblende, augite, hypersthene and FeTi oxides in a groundmass of the same phases plus glass)....
Water resources data, Montana, water year 1993
R.R. Shields, M. K. White, T.M. Brosten, C. L. Chambers
1994, Water Data Report MT-93-1
No abstract available....
Mineralogical studies of the nitrate deposits of Chile: VII. Two new saline minerals with the composition K6(Na,K)4Na6Mg10 (XO4) 12(IO3)12.12H2O: fuenzalidaite (X = S) and carlosruizite (X = Se)
J.A. Konnert, H. T. Evans Jr., J. J. McGee, G. E. Ericksen
1994, American Mineralogist (79) 1003-1008
Two new isostructural saline minerals from the nitrate deposits of northern Chile have the composition K6(Na,K)4Na6Mg10(XO4)12(IO3)12.12H2O: fuenzalidaite (X = S) and carlosruizite (X = Se,S,Cr). -from Authors...
Jurassic accretion of Nisling terrane along the western margin of Stikinia, Coast Mountains, northwestern British Columbia: Comment and Reply
David A. Brew, Arthur B. Ford, Glen R. Himmelberg, Lisel Currie, Randall R. Parrish
1994, Geology (22) 89-90
No abstract available ...
Paleomagnetic analysis of Miocene basalt flows in the Tehachapi Mountains, California
Jeffrey B. Plescia, Gary J. Calderone, Lawrence W. Snee
1994, Bulletin 2100
Mineral resources of the Million Hills Wilderness Study Area, Clark County, Nevada
Joel R. Bergquist, G.A. Nowlan, H. R. Blank Jr.
1994, Bulletin 1730-E
Dioxins and furans linked to reproductive impairment in wood ducks
Donald H. White, John T. Seginak
1994, Journal of Wildlife Management (58) 100-106
A wetland in central Arkansas was contaminated with polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans and because the area was a major waterfowl habitat, we studied the effects of the contamination on nesting wood ducks (Aix sponsa) during 1988-90. Residues in wood duck eggs, based on toxicity equivalency factors (TEFs) for combined...
Herbivory on shoalgrass by wintering redheads in Texas
Christine A. Mitchell, Thomas W. Custer, Phillip J. Zwank
1994, Journal of Wildlife Management (58) 131-141
An estimated 80% of redheads (Aythya americana) winter on the Laguna Madre of south Texas and Mexico and feed almost exclusively on shoalgrass (Halodule wrightii) rhizomes. Shoalgrass abundance has decreased by 60% over the past 30 years, and because the effects of shoalgrass loss on wintering redheads are unknown, we...
New records of Ergasilus (Copepoda: Ergasilidae) in the Laurentian Great Lakes, including a lakewide review of records and host associations
Patrick L. Hudson, Charles A. Bowen II, Ralph M. Stedman
1994, Canadian Journal of Zoology (72) 1002-1009
Ergasilus nerkae was found infecting ninespine stickleback (Pungitius pungitius) in lakes Huron, Michigan, and Superior and threespine stickleback (Gasterosteus aculeatus) and round whitefish (Prosopium cylindraceum) in Lake Huron. Based upon the literature and study of archived material, we propose that E. nerkae is enzootic to the Great Lakes and that...
Response of slimy sculpins to predation by juvenile lake trout in southern Lake Ontario
Randall W. Owens, Roger A. Bergstedt
1994, Transactions of the American Fisheries Society (123) 28-36
Abundance and biomass of slimy sculpin Cottus cognatus declined in Lake Ontario at depths most frequently occupied by juvenile lake trout Salvelinus namaycush (<70 m), but not at greater depths, during 1980–1987. The abundance of juvenile lake trout increased at depths less than 70 m between 1980 and 1987, and...
Osteological evidence of genetic divergence of lake trout (Salvelinus namaycush) in Lake Superior
Mary K. Burnham-Curtis, Gerald R. Smith
1994, Copeia (1994) 843-850
Three phenotypes of Salvelinus namaycush in Lake Superior, the lean, siscowet, and bumper, are traditionally identified primarily by fat content and body shape. Their taxonomic status is in question because of intermediates as well as the possibility that the diagnostic characters are ecophenotypic. Two osteological characters, the dorsal opercular notch...
Why are the PCB concentrations of salmonine individuals from the same lake so highly variable?
Charles P. Madenjian, Stephen R. Carpenter, Peter S. Rand
1994, Canadian Journal of Fisheries and Aquatic Sciences (51) 800-807
An individual-based model (IBM) was applied to the Lake Michigan rainbow trout (Oncorhynchus mykiss) population, with the objectives of explaining the observed variation in growth and in polychlorinated biphenyl (PCB) concentration within the population. When variation in prey PCB concentration was incorporated into the model, variability in PCB concentration among...
Generalized description and analysis of ground-water flow in the Cockfield and Sparta aquifers in Hinds, Madison, and Rankin counties, Mississippi
J. K. Arthur
1994, Water-Resources Investigations Report 93-4143
