Post-depositional alteration of titanomagnetite in a Miocene sandstone, south Texas (U.S.A.)
R. L. Reynolds
1982, Earth and Planetary Science Letters (61) 381-391
Petrographic and geochemical studies have yielded information on the time-space relationships of the post-depositional alteration of detrital titanomagnetite (Ti-mt) in fine- to medium-grained sandstone from unoriented core samples (taken below the water table at depths of 30–45 m) of the Miocene...
Siderite concretions: indicators of early diagenesis in the Gammon shale (Cretaceous).
D. L. Gautier
1982, Journal of Sedimentary Petrology (52) 859-871
The Gammon member of the Pierre shale of the northern Great Plains, USA, contains abundant siderite concretions. The relative depth and time of siderite precipitation can be inferred from the structure, mineralogy and isotopic composition of these concretions. Concretions that formed at shallow depths, early in the history of the...
Modern shallow-water graded sand layers from storm surges, Bering Shelf: a mimic of Bouma sequences and turbidite systems
C.H. Nelson
1982, Journal of Sedimentary Petrology (52) 537-545
A sequence of graded sand layers, interbedded with mud, extends offshore over 100 km from the Yukon Delta shoreline across the flat, shallow (<20 m depth) epicontinental shelf of the northern Bering Sea, Alaska. Proximal graded sand beds on the delta-front platform near...
Evaluation of the river die-away biodegradation test
Glenn D. Wylie, John R. Jones, B. Thomas Johnson
1982, Journal of the Water Pollution Control Federation (54) 1231-1236
The reliability of the river die-away (RDA) test for establishing the biodegradability of chemicals was assessed. Reproducibility of biodegradation in the RDA test was analyzed under conditions in which the test is commonly done. Biodegradation results were not reproducible for di-2-ethylexyl phthalate (DEHP) and phthalic acid in replicated RDA tests...
Mineral paragenesis in the talc-water experimental hydrothermal system.
G. Whitney, D. D. Eberl
1982, American Mineralogist (67) 944-949
The talc-like gel was treated between 300o and 550oC at 1 kbar for 7, 30, 50, 120 and 200 days. The trends suggest that stevensite and/or corrensite are the stable minerals at <450oC. At 500o- 550oC, talc is stable.-K.A.R....
Evaluating depth to shallow groundwater using Heat Capacity Mapping Mission (HCMM) data
J. L. Heilman, Donald G. Moore
1982, Photogrammetric Engineering and Remote Sensing (48) 1903-1906
Four dates of Heat Capacity Mapping Mission (HCMM) data were analyzed to evaluate the utility of HCMM thermal data for evaluating depth to shallow groundwater. During the summer, shallow water tables can create lower soil temperatures throughout the diurnal temperature cycle. Because of large spatial and temporal ground cover variations,...
Estimating irrigation water use and withdrawal of ground water on the High Plains, U.S.A.
J. R. Wray
1982, Advances in Space Research (2) 127-129
In four decades following the Dust Bowl days of the 1930's, extensive areas of dry farming and rangeland on the semi-arid U.S. High Plains were transformed into a vast region of irrigated oases, producing meat and grain for much of the world. The agricultural economy has experienced such rapid growth...
Preliminary model of regional Mesozoic groundwater flow and uranium deposition in the Colorado Plateau.
R.F. Sanford
1982, Geology (10) 348-352
Qualitative and numerical simulation of regional groundwater flow in the Colorado Plateau during Late Jurassic and Early Cretaceous time has led to a model of U deposition in areas of upwelling solutions. Palaeographic reconstruction shows that surface drainage and groundwater flow was generally to the NE and E. Groundwater flowing...
Accumulation rates of Th-230, Pa-231, and some transition metals on the Bermuda Rise
M.P. Bacon, J.N. Rosholt
1982, Geochimica et Cosmochimica Acta (46) 651-666
Measurements of 238U, 234U, 230Th, 232Th, 231Pa, Mn, Fe, Co, Ni, Cu, and Zn were made on 23 samples from core GPC-5, a 29-m giant piston core from a water depth of 4583 m on the northeastern Bermuda Rise (33°41.2′N, 57°36.9′W). This area is characterized by rapid deposition of sediment transported by abyssal currents. Unsupported 230Th...
Detection of diethylnitrosamine in nitrate-rich water following treatment with Rhodamine flow tracers
S. L. Abidi
1982, Water Research (16) 199-204
Extremely carcinogenic diethylnitrosamine (DENA) was found to form in up to 75% yield from the reaction of nitrite with the two commonly used water tracing dyes. Rhodamine B and Rhodamine WT, DENA was detected at trace levels (0.13–7.02 μg −1) in river water samples after treatment with the dye and nitrite....
Alewives and rainbow smelt in Lake Huron: midwater and bottom aggregations and estimates of standing stocks
Ray L. Argyle
1982, Transactions of the American Fisheries Society (111) 267-285
The continued availability of adequate amounts of forage fish, primarily alewives Alosa pseudoharengus and rainbow smelt Osmerus mordax, is critical to the success of ongoing programs aimed at rebuilding lake trout Salvelinus namaycush populations and maintaining other salmonid stocks in Lake Huron. These forage species are distributed at middepths as...
Survival of duck plaque virus in water from Lake Andes National Wildlife Refuge, South Dakota
K. Wolf, C.N. Burke
1982, Journal of Wildlife Diseases (18) 437-440
An isolant of duck plague herpesvirus from the Lake Andes Refuge outbreak was seeded in raw and filter-decontaminated water from two locations on the refuge, held at 4 C, and assayed for infectivity intermittently over a period of 2 mo. From an initial...
Wetlands and deepwater habitats: a new classification
L.M. Cowardin
1982, Journal of Soil and Water Conservation (37) 83-85
Abstract has not been submitted...
Geochemical indices of fine sediment transport, northwest Gulf of Mexico
C. W. Holmes
1982, Journal of Sedimentary Petrology (52) 307-321
The 210 Pb distribution, the clay mineralogy distribution, and the distribution of three trace metals, barium, lead, and manganese, in the sediments of the south Texas shelf are related to the dynamics of the sedimentary transport process. 210 Pb, whose concentration is time dependent, defines three loci...
The effect of natural weathering on the chemical and isotopic compositions of biotites
Norbert Clauer, J. R. O’Neil, C. Bonnot-Courtois
1982, Geochimica et Cosmochimica Acta (46) 1755-1762
The effect of progressive natural weathering on the isotopic (Rb-Sr, K-Ar, δD, δ18O) and chemical (REE, H2O+) compositions of biotite has been studied on a suite of migmatitic biotites from the Chad Republic. During the early stages of weathering the Rb-Sr system is strongly affected, the hydrogen and oxygen isotope compositions...
The oxygen isotope composition of granitoid and sedimentary rocks of the southern Snake Range, Nevada
D. E. Lee, I. Friedman, J.D. Gleason
1982, Contributions to Mineralogy and Petrology (79) 150-158
Six diverse intrusive igneous types are exposed as discrete outcrops within an area of 900 km2 in the southern Snake Range, White Pine County, Nevada. The previously recognized variety among these igneous types is reflected in the wide range of ??18O values (-1.1 to 13.4 permil) found in these rocks....
Two-dimensional compressional wave velocity structure under San Francisco Volcanic Field, Arizona, from teleseismic P residual measurements
D.A. Stauber
1982, Journal of Geophysical Research Solid Earth (87) 5451-5459
A low compressional-wave velocity region in the midcrust below the San Francisco Mountain stratovolcano, Arizona, has been detected by the teleseismic P residual technique. This region is approximately 6 km wide, lies between elevations of 9 km and 34 km below sea level, and has a compressional velocity reduction of more than...
Depositional setting and diagenetic evolution of some Tertiary unconventional reservoir rocks, Uinta Basin, Utah
Janet K. Pitman, T. D. Fouch, M. B. Goldhaber
1982, American Association of Petroleum Geologists Bulletin (66) 1581-1596
The Douglas Creek Member of the Tertiary Green River Formation underlies much of the Uinta basin, Utah, and contains large volumes of oil and gas trapped in a complex of fractured low-permeability sandstone reservoirs. In the southeastern part of the basin at Pariette Bench, the Eocene Douglas Creek Member is...
Incorporation of prior information on parameters into nonlinear regression groundwater flow models: 1. Theory
Richard L. Cooley
1982, Water Resources Research (18) 965-976
Prior information on the parameters of a groundwater flow model can be used to improve parameter estimates obtained from nonlinear regression solution of a modeling problem. Two scales of prior information can be available: (1) prior information having known reliability (that is, bias and random error structure) and (2) prior...
Mineralogy and stable isotope geochemistry of hydrothermally altered oceanic rocks
D.S. Stakes, J. R. O’Neil
1982, Earth and Planetary Science Letters (57) 285-304
Mineralogical and isotopic variations observed in altered glassy and crystalline rocksfrom the East Pacific Rise and the Mid-Atlantic Ridge provide information about the temperatures of alteration and seawater/rock ratios for various hydrothermal regimes within the oceanic crust. A systematic increase in alteration temperature is evident for the glassy rocksin the...
Comparison of techniques for estimating annual lake evaporation using climatological data
M.E. Andersen, H.E. Jobson
1982, Water Resources Research (18) 630-636
Mean annual evaporation estimates were determined for 30 lakes by use of a numerical model (Morton, 1979) and by use of an evaporation map prepared by the U.S. Weather Service (Kohler et al., 1959). These estimates were compared to the reported value of evaporation determined from measurements on each lake....
Differential compaction mechanism for earth fissures near Casa Grande, Arizona
R.C. Jachens, T.L. Holzer
1982, Geological Society of America Bulletin (93) 998-1012
Precise gravity measurements indicate that earth fissures or tension cracks caused by ground-water withdrawal within a 10-km2 area southeast of Casa Grande, Arizona, are associated with relief on the buried interface between the alluvial aquifer and underlying bedrock. All of the fissure zones; which...
Variation in sand body types on the eastern Bering Sea epicontinental shelf.
C.H. Nelson, W.R. Dupre, M.E. Field, J.D. Howard
1982, Geologie en Mijnbouw (61) 37-48
The eastern epicontinental shelf of the Bering Sea is characterized by variations in river and glacial sediment supply, wave energy, tidal range (microtidal to mesotidal), and tidal, geostrophic, and storm-induced currents. These factors, combined with the effect of the Holocene rise in sea level, have resulted in the formation of...
Carbonate porosity versus depth: A predictable relation for south Florida
J. W. Schmoker, R. B. Halley
1982, American Association of Petroleum Geologists Bulletin (66) 2561-2570
This study examines the porosity of limestones and dolomites in the South Florida basin. Porosity data are derived from borehole-gravity measurements and from suites of acoustic, neutron, and density logs. Both types of wire-line measurements sample large volumes of rock relative to petrographic methods and can be examined at vertical...
Stability of βMnOOH and manganese oxide deposition from springwater
J.D. Hem, C. E. Roberson, Reba B. Fournier
1982, Water Resources Research (18) 563-570
Beta MnOOH is precipitated preferentially (with respect to Mn3O4) at temperatures near O°C when Mn2+ is oxidized in aerated aqueous solutions. Upon aging in solutions open to the atmosphere a slurry of βMnOOH tends to disproportionate to form MnO2 and Mn2+. In such aged solutions, Mn2+ and H+ activities can be constant, and both...
