Cambrian potential indicated in Kentucky Rome trough
David C. Harris, James A. Drahovzal
1996, Oil & Gas Journal (94) 52-57
A recent gas discovery in the Rome trough has Appalachian basin operators re-evaluating the deep Cambrian potential of eastern Kentucky. The Rome trough has seen sporadic exploration since the late 1940s, with very limited commercial success. A new exploration phase began in mid-1994 with completion of the Carson Associates 1...
Removal of selenium from contaminated agricultural drainage water by nanofiltration membranes
Y.K. Kharaka, G. Ambats, T. S. Presser, R. A. Davis
1996, Applied Geochemistry (11) 797-802
Seleniferous agricultural drainage wastewater has become a new major source of pollution in the world. In the USA, large areas of farmland in 17 western states, generate contaminated salinized drainage with Se concentrations much higher than 5 ??g/l, the US Environmental Protection Agency water-quality criterion for the protection of aquatic...
Meeting summary - Coastal meteorology and oceanography: Report of the third prospectus development team of the U.S. Weather Research Program to NOAA and NSF
R. Rotunno, L.J. Pietrafesa, J. S. Allen, B.R. Colman, C.M. Dorman, C.W. Kreitzberg, S.J. Lord, M.G. McPhee, G.L. Mellor, C.N.K. Mooers, P.P. Niiler, R.A. Pielke Sr., M.D. Powell, D.P. Rogers, J.D. Smith, Lingtian Xie, R. Carbone
1996, Conference Paper, Bulletin of the American Meteorological Society
U.S. Weather Research Program (USWRP) prospectus development teams (PDTs) are small groups of scientists that are convened by the USWRP lead scientist on a one-time basis to discuss critical issues and to provide advice related to future directions of the program. PDTs are a principal source of information for the...
Occurrence of selected pesticides and their metabolites in near-surface aquifers of the midwestern United States
D.W. Kolpin, Thurman E. Michael, D. A. Goolsby
1996, Environmental Science & Technology (30) 335-340
The occurrence and distribution of selected pesticides and their metabolites were investigated through the collection of 837 water-quality samples from 303 wells across the Midwest. Results of this study showed that five of the six most frequently detected compounds were pesticide metabolites. Thus, it was common for a metabolite to...
Outburst floods from glacier-dammed lakes: The effect of mode of lake drainage on flood magnitude
Joseph S. Walder, John E. Costa
1996, Earth Surface Processes and Landforms (21) 701-723
Published accounts of outburst floods from glacier‐dammed lakes show that a significant number of such floods are associated not with drainage through a tunnel incised into the basal ice—the process generally assumed—but rather with ice‐marginal drainage, mechanical failure of part of the ice dam, or both. Non‐tunnel floods are strongly correlated with...
Mercury removal from combustion flue gas by activated carbon injection: Mass transfer effects
S. Chen, M. Rostam-Abadi, R. Chang
1996, ACS Division of Fuel Chemistry, Preprints (41) 442-446
[No abstract available]...
The combined use of 87Sr/86Sr and carbon and water isotopes to study the hydrochemical interaction between groundwater and lakewater in mantled karst
B. G. Katz, T.D. Bullen
1996, Geochimica et Cosmochimica Acta (60) 5075-5087
The hydrochemical interaction between groundwater and lakewater influences the composition of water that percolates downward from the surficial aquifer system through the underlying intermediate confining unit and recharges the Upper Floridan aquifer along highlands in Florida. The 87Sr/86Sr ratio along with the stable isotopes, D, 18O, and 13C were used as tracers...
Type of faulting and orientation of stress and strain as a function of space and time in Kilauea's south flank, Hawaii
D. Gillard, M. Wyss, P. Okubo
1996, Journal of Geophysical Research B: Solid Earth (101) 16025-16042
Earthquake focal mechanisms of events occurring between 1972 and 1992 in the south flank of Kilauea volcano, Hawaii, are used to infer the state of stress and strain as a function of time and space. We have determined 870 fault plane solutions from P wave first motion polarities for events with magnitudes ML ≥...
Aeromagnetic survey over US to advance geomagnetic research
T.G. Hildenbrand, R.J. Blakely, W. J. Hinze, Gordon R. Keller, R.A. Langel, M. Nabighian, W. Roest
1996, Eos, Transactions, American Geophysical Union (77) 265-268
A proposed high-altitude survey of the United States offers an exciting and cost effective opportunity to collect magnetic-anomaly data. Lockheed Martin Missile and Space Company is considering funding a reimbursable ER-2 aircraft (Figure 1) mission to collect synthetic aperture radar (SAR) imagery at an altitude of...
A two-stage model of fracture of rocks
V. Kuksenko, N. Tomilin, E. Damaskinskaya, D. Lockner
1996, Pure and Applied Geophysics (146)
In this paper we propose a two-stage model of rock fracture. In the first stage, cracks or local regions of failure are uncorrelated occur randomly throughout the rock in response to loading of pre-existing flaws. As damage accumulates in the rock, there is a gradual increase in the probability that...
Anthropogenic markers: Molecular tools to identify the source(S) and transport-pathway of pollutants
H. Takada, F. Satoh, Michael H. Bothner, B. Tripp, J. Farrington
1996, ACS Division of Environmental Chemistry, Preprints (36) 158-161
[No abstract available]...
The long-term salinity field in San Francisco Bay
R.J. Uncles, D. H. Peterson
1996, Continental Shelf Research (16) 2005-2039
Data are presented on long-term salinity behaviour in San Francisco Bay, California. A two-level, width averaged model of the tidally averaged salinity and circulation has been written in order to interpret the long-term (days to decades) salinity variability. The model has been used to simulate daily averaged salinity in the...
Ecosystem management and fishery resources of the Antarctic
J.E. McKenna Jr.
1996, Ecosystem Health (2) 110-126
A migratory mantle plume on Venus: Implications for Earth?
Mary G. Chapman, Randolph L. Kirk
1996, Journal of Geophysical Research B: Solid Earth (101) 15953-15967
A spatially fixed or at least internally rigid hotspot reference frame has been assumed for determining relative plate motions on Earth. Recent 1:5,000,000 scale mapping of Venus, a planet without terrestrial-style plate tectonics and ocean cover, reveals a systematic age and dimensional progression of corona-like arachnoids occurring in an uncinate...
Effects of agricultural practices and vadose zone stratigraphy on nitrate concentration in ground water in Kansas, USA
M.A. Townsend, R. O. Sleezer, S.A. Macko
Straskraba M., editor(s)
1996, Conference Paper, Water Science and Technology
Differences in nitrate-N concentrations in,around water in Kansas can be explained by variations in agricultural practices and vadose-zone stratigraphy. In northwestern Kansas, past use of a local stream for tailwater runoff from irrigation and high fertilizer applications for sugar-beet farming resulted in high nitrate-N concentrations (12-60 mg L-1; in both...
A top specified boundary layer (TSBL) approximation approach for the simulation of groundwater contamination processes
H. Rubin, R. W. Buddemeier
1996, Journal of Contaminant Hydrology (22) 123-144
This paper presents improvements in the 'classical boundary layer' (CBL) approximation method to obtain simple but robust initial characterization of aquifer contamination processes. Contaminants are considered to penetrate into the groundwater through the free surface of the aquifer. The improved method developed in this study is termed the 'top specified...
Lower and lower Middle Pennsylvanian coal palynofloras, southwestern Virginia
C.F. Eble
1996, International Journal of Coal Geology (31) 67-113
Lower and lower Middle Pennsylvanian coals, recovered from an exploratory drilling program in southwestern Virginia, were analyzed for their palynomorph content. Results show them to be dominated by spores produced by arboreous lycopsids. Lycospora pellucida and Lycospora pusilla generally are the most common species, with...
Comparison of alternative spatial resolutions in the application of a spatially distributed biogeochemical model over complex terrain
D.P. Turner, R. Dodson, D. Marks
1996, Ecological Modelling (90) 53-67
Spatially distributed biogeochemical models may be applied over grids at a range of spatial resolutions, however, evaluation of potential errors and loss of information at relatively coarse resolutions is rare. In this study, a georeferenced database at the 1-km spatial resolution was developed to initialize and drive a process-based model...
Pesticides in ground water: Do atrazine metabolites matter?
S. Liu, S.T. Yen, D.W. Kolpin
1996, Journal of the American Water Resources Association (32) 845-853
Atrazine and atrazine-residue (atrazine + two metabolites - deethylatrazine and deisopropylatrazine) concentrations were examined to determine if consideration of these atrazine metabolites substantially adds to our understanding of the distribution of this pesticide in groundwater of the midcontinental United States. The mean of atrazine.residue concentrations was 53 percent greater than...
Cadmium in the California Current system: Tracer of past and present upwelling
A. VanGeen, D.M. Husby
1996, Journal of Geophysical Research C: Oceans (101) 3489-3507
Over 100 samples were collected off the west coast of North America during 1991–1993 to determine the relation between wind‐driven upwelling and nearshore concentrations of dissolved silicate (Si), phosphate (P), and cadmium (Cd). Highly enriched in deep water offshore, these constituents are sensitive indicators of upwelling. Coastal...
Quality and petrographic characteristics of Paleocene coals from the Hanna basin, Wyoming
B.S. Pierce
1996, Conference Paper, Organic Geochemistry
Coal beds from the Ferris and Hanna Formations, in the Hanna basin, south-central Wyoming, exhibit distinct differences in ash yield, sulfur content, and petrographic and palynologic constituents. These differences are interpreted to be controlled by tectonic changes of the Hanna basin and adjoining uplifts during evolutionary development, which, in turn,...
Continental borate deposits of Cenozoic age
G.I. Smith, M.D. Medrano
1996, Reviews in Mineralogy (33) 223-284
[No abstract available]...
Trace fossils and sedimentary facies from a Late Cambrian‐Early Ordovician tide‐dominated shelf (Santa Rosita Formation, northwest Argentina): Implications for ichnofacies models of shallow marine successions
M. Gabriela Mángano, Luis A. Buatois, Guillermo F. Acenolaza
1996, Ichnos: An International Journal for Plant and Animal Traces (5) 53-88
The Santa Rosita Formation is one the most widely distributed lower Paleozoic units of northwest Argentina. At the Quebrada del Salto Alto section, east of Purmamarca, Jujuy Province, it is represented by four sedimentary facies: thick‐bedded planar cross‐stratified quartzose sandstones (A), thin‐bedded planar cross‐stratified quartzose sandstones and mudstones (B), wave‐rippled...
Adsorption of SO2 on bituminous coal char and activated carbon fiber prepared from phenol formaldehyde
Joseph A. DeBarr, Anthony A. Lizzio, Michael A. Daley
1996, ACS Division of Fuel Chemistry, Preprints (41) 339-342
Carbon-based materials are used commercially to remove SO2 from coal combustion flue gases. Historically, these materials have consisted of granular activated carbons prepared from lignite or bituminous coal. Recent studies have reported that activated carbon fibers (ACFs) may have potential in this application due to their relatively high SO2 adsorption...
AMS radiocarbon analyses from Lake Baikal, Siberia: Challenges of dating sediments from a large, oligotrophic lake
Steven M. Colman, Glenn A. Jones, M. Rubin, J.W. King, J.A. Peck, W. H. Orem
1996, Quaternary Science Reviews (15) 669-684
A suite of 146 new accelerator-mass spectrometer (AMS) radiocarbon ages provides the first reliable chronology for late Quaternary sediments in Lake Baikal. In this large, highly oligotrophic lake, biogenic and authigenic carbonate are absent, and plant macrofossils are extremely rare. Total organic carbon is therefore the primary material available for...
