Atrazine mineralization potential of alluvial-aquifer sediments under aerobic conditions
P.B. McMahon, F. H. Chapelle, M.L. Jagucki
1992, Environmental Science & Technology (26) 1556-1559
No abstract available....
Net Late Holocene emergence despite earthquake-induced submergence, south-central Chile
B.F. Atwater, H.J. Nunez, C. Vita-Finzi
1992, Quaternary International (15-16) 77-85
Intertidal deposits show net Late Holocene emergence at three sites along the Pacific coast near Maulli??n and Carelmapu, Chile (latitude 41.6-41.7??S.). The maximum amount of net emergence is ca. 1 m in the past 1500 years and ca. 2 1 2 m in the past 4000 years. Emergence probably would...
Mineralogy and geochemistry of two metamorphosed sedimentary manganese deposits, Sierra Nevada, California, USA
M.J.K. Flohr, J.S. Huebner
1992, LITHOS (29) 57-85
Laminated to massive rhodochrosite, hausmannite, and Mn-silicates from the Smith prospect and Manga-Chrome mine, Sierra Nevada, California were deposited as ocean floor sediments associated with chert and shale. The principal lithologies at Smith are chert, argillite, rhodochrosite-, hausmannite- and chlorite-rich layers, and relatively uncommon layers of jacobsite. The Manga-Chrome mine...
Nutritional value of dietary nucleic acids and purine bases to rainbow trout (Oncorhynchus mykiss)
G. L. Rumsey, Robert Winfree, Steven Gerard Hughes
1992, Aquaculture (108) 97-110
Rainbow trout were fed diets with graded levels (0.6%, 1.6%, 2.5%, and 4.1%) of a yeast nucleic acid extract corresponding to dietary Saccharomyces cerevisiae levels of 7.5%, 20%, 30% and 50% or diets supplemented isonitrogenously (0.8% N) with free purines (adenine, guanine, xanthine, and hypoxanthine) in two 12-week studies. Fish fed increasing...
Public-domain-software solution to data-access problems for numerical modelers
Harry Jenter, Richard Signell
1992, Conference Paper
Unidata's network Common Data Form, netCDF, provides users with an efficient set of software for scientific-data-storage, retrieval, and manipulation. The netCDF file format is machine-independent, direct-access, self-describing, and in the public domain, thereby alleviating many problems associated with accessing output from large hydrodynamic models. NetCDF has programming interfaces in both...
Toxicity reduction of photo processing wastewaters
W. Wang
1992, Journal of Environmental Science and Health - Part A Environmental Science and Engineering (27) 1313-1328
The photo processing industry can be characterized by treatment processes and subsequent silver recovery. The effluents generated all contain various amounts of silver. The objectives of this study were to determine toxicity of photo processing effluents and to explore their toxicity mitigation. Six samples, from small shops to a major...
The aqueous photolysis of α-pinene in solution with humic acid
Marvin C. Goldberg, Kirkwood M. Cunningham, George R. Aiken, Eugene R. Weiner
1992, Journal of Contaminant Hydrology (9) 79-89
Terpenes are produced abundantly by environmental processes but are found in very low concentrations in natural waters. Aqueous photolysis of solutions containing α-pinene, a representative terpene, in the presence of humic acid resulted in degradation of the pinene. Comparison of this reaction to photolysis of α-pinene in the presence of...
Aqueous solubilities, vapor pressures, and 1-octanol-water partition coefficients for C9-C14 linear alkylbenzenes
P.M. Sherblom, P.M. Gschwend, R.P. Eganhouse
1992, Journal of Chemical and Engineering Data (37) 394-399
Measurements and estimates of aqueous solubilities, 1-octanol-water partition coefficients (Kow), and vapor pressures were made for 29 linear alkylbenzenes having alkyl chain lengths of 9-14 carbons. The ranges of values observed were vapor pressures from 0.002 to 0.418 Pa, log Kow, from 6.83 to 9.95, and aqueous solubilities from 4...
Gold deposition by sulfidation of ferrous Fe in the lacustrine sediments of the Pueblo Viejo district (Dominican Republic): The effect of Fe-C-S diagenesis on later hydrothermal mineralization in a Maar-Diatreme complex
R.M. Kettler, R. O. Rye, S.E. Kesler, P.A. Meyers, J. Polanco, N. Russell
1992, Chemical Geology (99) 29-50
The Pueblo Viejo district, located in the Cordillera Central of the Dominican Republic, contains large Au-Ag deposits associated with acid-sulfate alteration within spilites, conglomerates and carbonaceous sedimentary rocks that were deposited in a maar-diatreme complex. Much of the Au mineralization occurs in pyritic, carbonaceous siltstones of the Pueblo Viejo Maar-Diatreme...
Remote sensing of suspended sediment discharge into the western Gulf of Maine during the April 1987 100-year flood
R. P. Stumpf, P.M. Goldschmidt
1992, Journal of Coastal Research (8) 281-225
The suspended sediment discharge during this event was identified using NOAA-9 and NOAA-10 Advanced Very High Resolution Radiometer (AVHRR) data from March 29 to April 14. The sediment plumes showed a westward movement upon reaching the Gulf of Maine. 105 metric tons of fine-grained sediments were carried onto the continental...
Late quaternary uplift rates of marine terraces on the Pacific coast of North America, southern Oregon to Baja California sur
D.R. Muhs, T. K. Rockwell, G. L. Kennedy
1992, Quaternary International (15-16) 121-133
Marine terraces are common landforms along the Pacific coast of North America from southern Oregon to southern Baja California. We report 60 new uranium-series ages of marine terrace corals, hydrocorals, and other fossils. Terraces representing the ca. 80 ka and ca. 125 ka high stands of sea are the most...
Experiments with central-limit properties of spatial samples from locally covariant random fields
T. H. Barringer, T. E. Smith
1992, Regional Science and Urban Economics (22) 387-403
When spatial samples are statistically dependent, the classical estimator of sample-mean standard deviation is well known to be inconsistent. For locally dependent samples, however, consistent estimators of sample-mean standard deviation can be constructed. The present paper investigates the sampling properties of one such estimator, designated as the tau estimator of sample-mean standard...
Late Cretaceous to Miocene phosphatic sediments in the Georges Bank Basin, U.S. North Atlantic outer continental shelf
L.J. Poppe, F.T. Manheim, P. Popenoe
1992, Marine Geology (107) 227-238
Phosphorite and phosphatic sediments are present in the Georges Bank Basin in marine, Late Cretaceous to Miocene strata equivalent to the Dawson Canyon Formation and Banquereau Formation of offshore Nova Scotia. The Late Cretaceous to Paleocene phosphorite occurs predominantely as sand-...
Another look at the calculation of fallout tephra volumes
J. Fierstein, M. Nathenson
1992, Bulletin of Volcanology (54) 156-167
The calculation of volumes of fallout tephra layers is difficult because of the nonlinear dependence of thickness on area and because of the extrapolations required at the vent and in distal regions. Calculation using the trapezoidal rule, straight lines on log-log plots of area versus thickness, straight lines on plots...
Tecuamburro Volcano, Guatemala: Exploration geothermal gradient drilling and results
S.J. Goff, F. Goff, C. J. Janik
1992, Geothermics (21) 483-502
Results of geological, volcanological, hydrogeochemical, and geophysical field studies conducted in 1988 and 1989 at the Tecuamburro geothermal site, Guatemala, indicate that there is a substantial shallow heat source beneath the area of youngest volcanism. Gases from acid-sulfate springs near Laguna Ixpaco consistently yield maximum estimated subsurface temperatures of 300°C....
Campanian ammonites from the Upper Cretaceous Gober Chalk of Lamar County, Texas
W. A. Cobban, W. J. Kennedy
1992, Journal of Paleontology (66) 440-454
The Roxton Limestone Member at the top of the Gober Chalk in northeast Texas yields a rich fauna, dominated by Baculites haresi Reeside, 1927, and Inoceramus balticus Boehm, 1909, with sparse occurrences of pachydiscus cf. P. paulsoni (Young, 1963), Anapachydiscus sp.juv., Placenticeras placenta (DeKay, 1828), Hoplitoplacenticeras aff. H. plasticum (Paulcke,...
Discordant 14C ages from buried tidal-marsh soils in the Cascadia subduction zone, southern Oregon coast
A.R. Nelson
1992, Quaternary Research (38) 74-90
Peaty, tidal-marsh soils interbedded with estuarine mud in late Holocene stratigraphic sequences near Coos Bay, Oregon, may have been submerged and buried during great (M > 8) subduction earthquakes, smaller localized earthquakes, or by nontectonic processes. Radiocarbon dating might help distinguish among these alternatives by showing that soils at different...
Depositional history, nannofossil biostratigraphy, and correlation of Argo Abyssal Plain Sites 765 and 261
Julie A. Dumoulin, Paul R. Bown
Sondra K. Stewart, Diana Kennett, Elsa K. Mazzullo, editor(s)
1992, Proceedings of the Ocean Drilling Program: Scientific Results 123-1
Sediments from the Argo Abyssal Plain (AAP), northwest of Australia, are the oldest known from the Indian Ocean and were recovered from ODP Site 765 and DSDP Site 261. New biostratigraphic and sedimentologic data from these sites, as well as reinterpretations of earlier findings, indicate that basal sediments at both...
Chemical changes and carbon isotope variations in a cross-section of a large Miocene gymnospermous log
A. L. Bates, E.C. Spiker
1992, Chemical Geology (101) 247-254
The cross-sectional radius of a 3-m (diam.) brown coal gymnospermous log of Miocene age, previously analyzed for carbohydrate and lignin methoxyl content by solid-state13C nuclear magnetic resonance spectroscopy, was examined using stable carbon isotopic ratios in order to determine if the...
The 1990 conterminous U. S. AVHRR data set
Jeffery C. Eidenshink
1992, Photogrammetric Engineering and Remote Sensing (58) 809-813
The U.S. Geological Survey, using NOAA-ll Advanced Very High Resolution Radiometer (AVHRR) 1-km data, has produced a time series of 19 biweekly maximum normalized difference vegetation index (NDV!) composites of the conterminous United States for the 1990 growing season. Each biweekly composite included data from approximately 20 calibrated and georegistered...
Lake acidity and mercury content of fish in Darwin National Reserve, Russia
Terry A. Haines, V. Komov, C. H. Jagoe
1992, Environmental Pollution (78) 107-112
Darwin National Reserve is a protected natural area on the north-west shore of the Rybinsk Reservoir, 350 km north of Moscow. In June 1989, six lakes in the Reserve and the reservoir were surveyed to assess lake acidity and the mercury content of perch, Perca fluviatilis. Five were seepage lakes...
Histopathologic biomarkers
D.E. Hinton, P. C. Baumann, G. R. Gardner, W. E. Hawkins, J. D. Hendricks, R. A. Murchelano, M.S. Okihiro
R.J. Huggett, R. A. Kimerle, P. M. Mehrle, H.L. Bergman, editor(s)
1992, Book chapter, Biomarkers; biochemical, physiological, and histological markers of anthropogenic stress
No abstract available....
An aeromagnetic survey over the northwestern Ross Ice Shelf and the McMurdo Sound area
Detlef Damaske, Uwe Meyer, Anne E. McCafferty, John Behrendt, Herbert Hoppe
1992, Polarforschung (60) 152-156
As part of the expedition GANOVEX VI 1990/91, the Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), the Alfred Wegener Institute for Polar and Marine Research (AWI), and the United States Geological Survey (USGS) carried out an airborne magnetic survey over the northwestern Ross Ice Shelf and McMurdo Sound between Ross Island,...
Characteristics and processing of seismic data collected on thick, floating ice: Results from the Ross Ice Shelf, Antarctica
Bruce C. Beaudoin, Uri S. ten Brink, Tim A. Stern
1992, Geophysics (57) 1359-1372
Coincident reflection and refraction data, collected in the austral summer of 1988/89 by Stanford University and the Geophysical Division of the Department of Scientific and Industrial Research, New Zealand, imaged the crust beneath the Ross Ice Shelf, Antarctica. The Ross Ice Shelf is a unique acquisition environment for seismic reflection...
Effects of saline ground-water discharge on water quality of the Red River of the North, northeastern North Dakota
M.L. Strobel, P.J. Gerla
1992, Conference Paper, Proceedings, North Dakota Water Quality Symposium
No abstract available....
