Origin of caves and other solution openings in the unsaturated (vadose) zone of carbonate rocks: A model for CO2 generation
W.W. Wood
1985, Geology (13) 822-824
The enigma that caves and other solution openings form in carbonate rocks at great depths below land surface rather than forming from the surface downward can be explained by the generation of CO2 within the aquifer system. In the proposed model, CO2 is generated by the oxidation of particulate and/or...
Assessment of long-term salinity changes in an irrigated stream-aquifer system
Leonard F. Konikow, Mark Person
1985, Water Resources Research (21) 1611-1624
Changes in salinity in groundwater and surface water in the Arkansas River valley of southeastern Colorado are primarily related to irrigation practices. A solute transport model was applied to an 11-mile reach of the valley to compute salinity changes in response to spatially and temporally varying stresses. The model was...
Absolute calibration of Landsat instruments using the moon.
H. H. Kieffer, R.L. Wildey
1985, Photogrammetric Engineering and Remote Sensing (51) 1391-1393
A lunar observation by Landsat could provide improved radiometric and geometric calibration of both the Thematic Mapper and the Multispectral Scanner in terms of absolute radiometry, determination of the modulation transfer function, and sensitivity to scattered light. A pitch of the spacecraft would be required. -Authors...
Lacustrine-humate model for primary uranium ore deposits, Grants uranium region, New Mexico
C. E. Turner-Peterson
1985, American Association of Petroleum Geologists Bulletin (69) 1990-2020
Two generations of uranium ore, primary and redistributed, occur in fluvial sandstones of the Upper Jurassic Morrison Formation in the San Juan basin; the two stages of ore formation can be related to the hydrologic history of the basin. Primary ore formed soon after Morrison deposition, in the Late Jurassic...
Streamflow variability in the United States: 1931-1978.
H.F. Lins
1985, Journal of Climate and Applied Meteorology (24) 463-471
Systematic modes of spatial and temporal variation in a 48-year record of streamflow are defined using principal components. The components were calculated from a matrix of annual streamflow departures for 106 grid cells covering the United States in the years 1931-78. Five statistically significant components are found to account for...
A nomogram for interpreting slope stability of fine-grained deposits in modern and ancient-marine environments.
J.S. Booth, D.A. Sangrey, J.K. Fugate
1985, Journal of Sedimentary Petrology (55) 29-36
Design of the nomogram is based on effective stress and combines consolidation theory as applicable to depositional environments with the infinite-slope model of slope-stability analysis. The link between the two combined theories is a term representing the effective overburden stress, which may be...
Limnocythere bradburyi n.sp.: a modern ostracode from central Mexico and a possible Quaternary paleoclimatic indicator
R. M. Forester
1985, Journal of Paleontology (59) 8-20
Limnocythere bradburyi is a new species of nonmarine ostracode that is living in several lakes in the central Mexican Plateau. These lakes are shallow, turbid, and pan-shaped, having relatively unstable and fluid substrates. Water levels of these lakes are high in the summer and low or dry in the winter....
Seasonal variation in sediment transport on the Russian River shelf, California
D.E. Drake, D.A. Cacchione
1985, Continental Shelf Research (4) 495-514
Near-bottom currents, light transmission and scattering, and bottom pressure were measured with GEOPROBE tripods and vector-averaging current meters during June 1979 to April 1980 on the central shelf 10 km west of the Russian River, California. The instruments were located on the mid-shelf mud belt composed of bimodal sandy clayey...
Persisting effects of armored military maneuvers on some soils of the Mojave Desert
D.V. Prose
1985, Environmental Geology and Water Sciences (7) 163-170
Soil compaction and substrate modification produced during large-scale armored military maneuvers in the early 1940s were examined in 1981 at seven sites in California's eastern Mojave Desert Recording penetrometer measurements show that tracks left by a single pass of an M3 "medium" tank have average soil resistance values that are...
Water balance models in one-month-ahead streamflow forecasting
William M. Alley
1985, Water Resources Research (21) 597-606
Techniques are tested that incorporate information from water balance models in making 1-month-ahead streamflow forecasts in New Jersey. The results are compared to those based on simple autoregressive time series models. The relative performance of the models is dependent on the month of the year in question. The water balance...
Isotopic studies of the late Archean plutonic rocks of the Wind River Range, Wyoming
J. S. Stuckless, C. E. Hedge, R. G. Worl, K. R. Simmons, Ignatius T. Nkomo, D. B. Wenner
1985, Geological Society of America Bulletin (96) 850-860
Isotopic studies of the Rb-Sr and U-Th-Pb systems in whole-rock samples and the U-Pb systematics for zircons document the existence of two late Arehean intrusive events in the Wind River Range. All of the systems examined indicate an age of ∼2,630 ± 20...
Germanium geochemistry and mineralogy
L.R. Bernstein
1985, Geochimica et Cosmochimica Acta (49) 2409-2422
Germanium is enriched in the following geologic environments:1.(1) iron meteorites and terrestrial iron-nickel;2.(2) sulfide ore deposits, particularly those hosted by sedimentary rocks;3.(3) iron oxide deposits;4.(4) oxidized zones of Ge-bearing sulfide deposits;5.(5) pegmatites, greisens, and skarns; and6.(6) coal...
Modeling the rate-controlled sorption of hexavalent chromium
D.B. Grove, Kenneth G. Stollenwerk
1985, Water Resources Research (21) 1703-1709
Sorption of chromium VI on the iron-oxide- and hydroxide-coated surface of alluvial material was numerically simulated with rate-controlled reactions. Reaction kinetics and diffusional processes, in the form of film, pore, and particle diffusion, were simulated and compared with experimental results. The use of empirically calculated rate coefficients for diffusion through...
Franciscan complex calera limestones: Accreted remnants of farallon plate oceanic plateaus
J.A. Tarduno, M. McWilliams, M.G. Debiche, W.V. Sliter, M.C. Blake
1985, Nature (317) 345-347
The Calera Limestone, part of the Franciscan Complex of northern California, may have formed in a palaeoenvironment similar to Hess and Shatsky Rises of the present north-west Pacific1. We report here new palaeomagnetic results, palaeontological data and recent plate-motion models that reinforce this assertion. The Calera Limestone may have formed...
Partition coefficients of organic compounds in lipid-water systems and correlations with fish bioconcentration factors
C. T. Chiou
1985, Environmental Science & Technology (19) 57-62
Triolein-water partition coefficients (KtW) have been determined for 38 slightly water-soluble organic compounds, and their magnitudes have been compared with the corresponding octanol-water partition coefficients (KOW). In the absence of major solvent-solute interaction effects in the organic solvent phase, the conventional treatment (based on Raoult's law) predicts sharply lower partition...
Erosion of the Laurentide region of North America by glacial and glaciofluvial processes
M. Bell, E.P. Laine
1985, Quaternary Research (23) 154-174
Collection of seismic reflection data from continental margins and ocean basins surrounding North America makes it possible to estimate the amount of material eroded from the area formerly covered by Laurentide ice sheets since major glaciation began in North America. A minimum estimate is made of 1.62 ?? 106 km3,...
Correlations among hydrocarbon microseepage, soil chemistry, and uptake of micronutrients by plants, Bell Creek oil field, Montana
S.S. Roeming, T.J. Donovan
1985, Journal of Geochemical Exploration (23) 139-162
Chelate-extractable iron and manganese concentrations in soils over and around the Bell Creek oil field suggest that compared to low average background values, there are moderate amounts of these elements directly over the production area and higher concentrations distributed in an...
Regional magnetotelluric surveys in hydrocarbon exploration, Parana Basin, Brazil
William D. Stanley, Antonio Roberto Saad Roberto, Walter Ohofugi
1985, American Association of Petroleum Geologists Bulletin (69) 346-360
The magnetotelluric geophysical method has been used effectively as a hydrocarbon exploration tool in the intracratonic Parana basin of South America. The Parana basin has an area of about 1,200,000 km2 (463,000 mi2), extending over portions of Brazil, Paraguay, Uruguay, Argentina, and Bolivia. The Paleozoic marine sedimentary rocks in the Parana...
The plumbotectonics of the West Shasta mining district, eastern Klamath Mountains, California
B. R. Doe, M.H. Delevaux, J. P. Albers
1985, Economic Geology (80) 2136-2148
The tectonic setting comprising the West Shasta mining district has often been compared with that of primitive island arcs. Concentrations of uranium, thorium, and lead and lead isotope compositions were determined for Devonian ores and rocks of the West Shasta district, eastern Klamath Mountains, California, to help evaluate the tectonic...
Trondhjemite and metamorphosed quartz keratophyre tuff of the Ammonoosuc volcanics (Ordovician), western New Hampshire and adjacent Vermont and Massachusetts
G. W. Leo
1985, Geological Society of America Bulletin (96) 1493-1507
The Ammonoosuc Volcanics and equivalent rocks of Ordovician age are exposed in the Oliverian domes along the Bronson Hill anti-clinorium (BHA) between northern New Hampshire and southern Connecticut. In western New Hampshire and adjacent Vermont and Massachusetts, the Ammonoosuc lithology consists of a...
Subdivision of thick sedimentary units into layers for simulation of groundwater flow
J. S. Weiss, A. K. Williamson
1985, Groundwater (23) 767-774
Subdividing thick sedimentary units into model layers based solely on stratigraphy can lead to serious violation of groundwater flow modeling restraints and produce erroneous results. Borehole geophysical data can be used to suggest relative permeabilities and delineate model layers that are more likely to have uniform hydraulic properties than layers...
Simulation of ground-water flow in southeastern Oahu, Hawaii
P. R. Eyre
1985, Groundwater (23) 325-330
On the leeward side of southeastern Oahu, Hawaii, near-vertical dikes have intruded the gently dipping and highly permeable lava flows of the Koolau mountain. These dikes bound the study area on the north and west and internally divide it into the Waialae and Wailupe-Hawaii Kai...
A quantitative analysis of the Lassen hydrothermal system, north central California
S. E. Ingebritsen, M.L. Sorey
1985, Water Resources Research (21) 853-868
Our conceptual model of the Lassen system is termed a liquid-dominated hydrothermal system with a parasitic vapor-dominated zone. The essential feature of this model is that steam and steam-heated discharge at relatively high altitudes in Lassen Volcanic National Park (LVNP) and liquid discharge with high chloride concentrations at relatively low...
Interpretation with a Donnan-based concept of the influence of simple salt concentration on the apparent binding of divalent ions to the polyelectrolytes polystyrenesulfonate and dextran sulfate
J.A. Marinsky, Robert F. Baldwin, M.M. Reddy
1985, Journal of Physical Chemistry (89) 5303-5307
It has been shown that the apparent enhancement of divalent metal ion binding to polyions such as polystyrenesulfonate (PSS) and dextran sulfate (DS) by decreasing the ionic strength of these mixed counterion systems (M2+, M+, X-, polyion) can be anticipated with the Donnan-based model developed by one of us (J.A.M.)....
Thickness of ice on perennially frozen lakes
C.P. McKay, G.D. Clow, R.A. Wharton Jr., S. W. Squyres
1985, Nature (313) 561-562
The dry valleys of southern Victoria Land, constituting the largest ice-free expanse in the Antarctic, contain numerous lakes whose perennial ice cover is the cause of some unique physical and biological properties 1-3. Although the depth, temperature and salinity of the liquid water varies considerably from lake to lake, the...
