Rapid oxidation of geothermal arsenic(III) in streamwaters of the eastern Sierra Nevada
J.A. Wilkie, J. G. Hering
1998, Environmental Science & Technology (32) 657-662
Arsenic redox cycling was examined in source waters of the Los Angeles Aqueduct, specifically at Hot Creek, a tributary of the Owens River. Elevated arsenic concentrations in Hot Creek result from geothermal inputs. Total arsenic and As(III) concentrations were determined in the creek and in hot spring pools along its...
Real-time monitoring of bluff stability at Woodway, Washington, USA
R.L. Baum, E. L. Harp, W.J. Likos, P. S. Powers, R.G. LaHusen
Evangelista A.Picarelli L.Evangelista A.Picarelli L., editor(s)
1998, Conference Paper, The geotechnics of hard soils - soft rocks. Proceedings of the second international symopsium on hard soils-soft rocks, Naples, October 1998. (Two volumes).
On January 15, 1997, a landslide of approximately 100,000-m3 from a coastal bluff swept five cars of a freight train into Puget Sound at Woodway, Washington, USA, 25 km north of downtown Seattle. The landslide resulted from failure of a sequence of dense sands and hard silts of glacial and...
Depth of the base of the Jackson aquifer, based on geophysical exploration, southern Jackson Hole, Wyoming, USA
Bernard T. Nolan, David L. Campbell, R. Michael Senterfit
1998, Hydrogeology Journal (6) 374-382
A geophysical survey was conducted to determine the depth of the base of the water-table aquifer in the southern part of Jackson Hole, Wyoming, USA. Audio-magnetotellurics (AMT) measurements at 77 sites in the study area yielded electrical-resistivity logs of the subsurface, and these were used to infer lithologic changes with...
Bayesian statistics applied to the location of the source of explosions at Stromboli Volcano, Italy
G. Saccorotti, B. Chouet, M. Martini, R. Scarpa
1998, Bulletin of the Seismological Society of America (88) 1099-1111
We present a method for determining the location and spatial extent of the source of explosions at Stromboli Volcano, Italy, based on a Bayesian inversion of the slowness vector derived from frequency-slowness analyses of array data. The method searches for source locations that...
Foods of Spectacled Eiders Somateria fischeri in the Bering Sea, Alaska
Margaret R. Petersen, John F. Piatt, K.A. Trust
1998, Wildfowl (49) 124-128
The winter diet of Spectacled Eiders living in marine habitats is known only from two individuals described by Cottam (1939). Here we examine marine diets from 36 stomachs collected near St. Lawrence Island, Bering Sea, Alaska, during May-June in 1987 and 1992. All Spectacled Eiders ate Mollusca, including Gastropoda (snails;...
Paleopedology plus TL, 10Be, and14C dating as tools in stratigraphic and paleoclimatic investigations, Mississippi River Valley, U.S.A.
H. W. Markewich, D.A. Wysocki, M.J. Pavich, E.M. Rutledge, Hugh T. Millard Jr., F.J. Rich, P.B. Maat, M. Rubin, J. P. McGeehin
1998, Quaternary International (51-52) 143-167
Thick ( ??? 35 m) loess deposits are present on ridges and high bluffs in the northern-half of the Lower Mississippi Valley (LMV), U.S.A. Detailed descriptions of the loess sections and pedologic, physiochemical, and mineralogic analyses and TL, 14C, and 10Be age determinations, allow preliminary paleoclimatic reconstructions for the late...
Development of migratory behavior in northern white-tailed deer
M.E. Nelson
1998, Canadian Journal of Zoology (76) 426-432
I examined the development of migratory behavior in northern white-tailed deer (Odocoileus virginianus) from 1975 to 1996 by radio-tracking adult females and their fawns. Of 40 migratory fawns with radio-collared mothers, all returned from winter ranges to their mothers' summer ranges, as did 36 fawns with unknown mothers. Of 1.5-...
Microbial oxidation of elemental selenium in soil slurries and bacterial cultures
P.R. Dowdle, R.S. Oremland
1998, Environmental Science & Technology (32) 3749-3755
The microbial oxidation of elemental selenium [Se(O)] was studied by employing 75Se(O) as a tracer. Live, oxic soil slurries demonstrated a linear production of mostly Se(IV), with the formation of smaller quantities of Se(VI). Production of both Se(IV) and Se(VI) was inhibited by autoclaving, formalin, antibiotics, azide, and 2,4-dinitrophenol, thereby...
Nesting ecology of Spectacled Eiders Somateria fischeri on the Indigirka River Delta, Russia
John M. Pearce, Daniel Esler, Andrei G. Degtyarev
1998, Wildfowl (49) 110-123
In 1994 and 1995 we investigated breeding biology and nest site habitat of Spectacled Eiders on two study areas within the coastal fringe of the Indigirka River Delta, Russia (71°20' N, 150°20' E). Spectacled Eiders were first observed on 6 June in both years and nesting commenced by mid-June. Average...
Release of sulfur- and oxygen-bound components from a sulfur-rich kerogen during simulated maturation by hydrous pyrolysis
A. Putschew, C. Schaeffer-Reiss, P. Schaeffer, M.P. Koopmans, J. W. De Leeuw, M. D. Lewan, Damste J.S. Sinninghe, J.R. Maxwell
1998, Organic Geochemistry (29) 1875-1890
An immature sulfur-rich marl from the Gessosso-solfifera Formation of the Vena del Gesso Basin (Messinian, Italy) has been subjected to hydrous pyrolysis (160 to 330??C) to simulate maturation under natural conditions. The kerogen of the unheated and heated samples was isolated and the hydrocarbons released by selective chemical degradation (Li/EtNH2...
A review of the relationships between visitors and ungulates in national parks
R. Gerald Wright
1998, Wildlife Society Bulletin (26) 471-476
The growth in ungulate populations and the enhanced viewing opportunities they provide in many national parks, a mixed blessing to park managers, has been viewed positively by most park visitors. Visitors, long the major constituency of parks, have played a major role in the way ungulates are managed. I trace...
A history of early geologic research in the Deep River Triassic Basin, North Carolina
T. W. Clark
1998, Southeastern Geology (38) 65-76
The Deep River Triassic basin has one of the longest recorded histories of geologic research in North Carolina. A quick perusal of nineteenth century geologic literature in North Carolina reveals the Deep River basin has received a tremendous amount of attention, second only, perhaps, to the gold deposits of the...
Oxalate adsorption at a plagioclase (An47) surface and models for ligand-promoted dissolution
L.L. Stillings, J.I. Drever, S.R. Poulson
1998, Environmental Science & Technology (32) 2856-2864
Previous work on adsorption of oxalate at aluminosilicate surfaces suggests that maximum adsorption occurs through a bidentate attachment of the organic ligand, at near-neutral pH. Rates of ligand-promoted dissolution are expected to be greatest at this pH as well. We tested this model by measuring oxalate adsorption on the surface...
Organophosphate and carbamate insecticides in agricultural waters and cholinesterase (ChE) inhibition in common carp (Cyprinus carpio)
S.J. Gruber, M.D. Munn
1998, Archives of Environmental Contamination and Toxicology (35) 391-396
Cholinesterase (ChE) activity was used as a biomarker for assessing exposure of common carp (Cyprinus carpio) to organophosphate and carbamate insecticides from irrigated agricultural waters. Carp were collected from a lake (Royal Lake) that receives most of its water from irrigation return flows and from a reference lake...
The central and northern Appalachian Basin-a frontier region for coalbed methane development
P.C. Lyons
1998, International Journal of Coal Geology (38) 61-87
The Appalachian basin is the world's second largest coalbed-methane (CBM) producing basin. It has nearly 4000 wells with 1996 annual production at 147.8 billion cubic feet (Bcf). Cumulative CBM production is close to 0.9 trillion cubic feet (Tcf). The Black Warrior Basin of Alabama in the southern Appalachian basin (including...
Production of carbonate sediments by a unicellular green alga
K. K. Yates, L. L. Robbins
1998, American Mineralogist (83) 1503-1509
This study investigates the ability of the unicellular green alga Natmochloris atoimis to precipitate CaCO3, quantifies mineral precipitation rates, estimates sediment production in a N. atomiis bloom, and discusses the implications of microbial calcification for carbonate sediment deposition. A series of N. atomus cultures, isolated from Lake Reeve, Australia, were...
Migrational characteristics of juvenile spring Chinook salmon and steelhead in Lower Granite Reservoir and tributaries, Snake River
N.S. Adams, D.W. Rondorf, M.A. Tuell, M.J. Banuch
1998, Report
Abstract not available...
Metal exposures to native populations of the caddisfly Hydropsyche (Trichoptera: Hydropsychidae) determined from cytosolic and whole body metal concentrations
D.J. Cain, S. N. Luoma
1998, Hydrobiologia (386) 103-117
Metal concentrations of the soluble fraction of the cytoplasm (cytosol) and the whole body were determined in the caddisfly Hydropsyche spp. (Trichoptera). Metal accumulation in the cytosol and the whole body were compared in samples collected along 380 kms of a contamination gradient in the Clark...
The reduction of aqueous metal species on the surfaces of Fe(II)-containing oxides: The role of surface passivation
A. F. White, M. L. Peterson
1998, ACS Symposium Series (715) 323-341
The reduction of aqueous transition metal species at the surfaces of Fe(II)- containing oxides has important ramifications in predicting the transport behavior in ground water aquifers. Experimental studies using mineral suspensions and electrodes demonstrate that structural Fe(II) heterogeneously reduces aqueous ferric, cupric, vanadate and chromate ions on magnetite and ilmenite...
Structural control of coalbed methane production in Alabama
J.C. Pashin, R.H. Groshong Jr.
1998, International Journal of Coal Geology (38) 89-113
Thin-skinned structures are distributed throughout the Alabama coalbed methane fields, and these structures affect the production of gas and water from coal-bearing strata. Extensional structures in Deerlick Creek and Cedar Cove fields include normal faults and hanging-wall rollovers, and area balancing indicates that these structures are detached in the Pottsville...
Chemical weathering in a tropical watershed, Luquillo Mountains, Puerto Rico: I. Long-term versus short-term weathering fluxes
A. F. White, A.E. Blum, M. S. Schulz, D.V. Vivit, David A. Stonestrom, M. Larsen, S.F. Murphy, D. Eberl
1998, Geochimica et Cosmochimica Acta (62) 209-226
The pristine Rio Icacos watershed in the Luquillo Mountains in eastern Puerto Rico has the fastest documented weathering rate of silicate rocks on the Earth's surface. A regolith propagation rate of 58 m Ma-1 calculated from iso-volumetric saprolite formation from quartz diorite, is comparable to the estimated denudation rate (25-50...
Observations of wind-generated shoreface currents off Duck, North Carolina
J. P. Xu, L.D. Wright
1998, Journal of Coastal Research (14) 610-619
Wind, wave and currents measurements at 9 and 14 meter water depths on the shoreface off U.S. Army Corps of Engineers Field Research Facility at Duck, North Carolina are presented. Coastal setup accompanied by southerly-setting alongshore currents and seaward cross-shore currents is developed during Northeasterly storms. Coastal setdown, with reversal...
Sorrption of aquatic fulvic acid on streambed iron oxides: In-stream reaction rates and chemical fractionation
Diane M. McKnight, G. Hornberger, K. Bencala
1998, ACS Division of Environmental Chemistry, Preprints (38) 62-63
[No abstract available]...
Calcite crystal growth inhibition by organic acids isolated from the Florida Everglades
A.R. Hoch, M.M. Reddy, G. R. Aiken
1998, ACS Division of Environmental Chemistry, Preprints (38) 78-81
[No abstract available]...
Bacillus arsenicoselenatis, sp. nov., and Bacillus selenitireducens, sp. nov.: Two haloalkaliphiles from Mono Lake, California that respire oxyanions of selenium and arsenic
Blum J. Switzer, Bindi A. Burns, J. Buzzelli, J.F. Stolz, R.S. Oremland
1998, Archives of Microbiology (171) 19-30
Two gram-positive anaerobic bacteria (strains E1H and MLS10) were isolated from the anoxic muds of Mono Lake, California, an alkaline, hypersaline, arsenic-rich water body. Both grew by dissimilatory reduction of As(V) to As(III) with the concomitant oxidation of lactate to acetate plus CO2. Bacillus arsenicoselenatis (strain E1H) is a spore-forming...
