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Page 5261, results 131501 - 131525

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Not all publications have extents, not all extents are completely accurate
Chloride Concentration in Water from the Upper Permeable Zone of the Tertiary Limestone Aquifer System, Southeastern United States
Craig L. Sprinkle
1982, Open-File Report 81-1103
INTRODUCTION The tertiary limestone aquifer system of the southeastern United States is a sequence of carbonate rocks referred to as the Floridan aquifer in Florida and the principal artesian aquifer in Georgia, Alabama, and South Carolina. More than 3 billion gallons of water are pumped daily from the limestone aquifer; and...
Bedform climbing in theory and nature
D. M. Rubin, R. E. Hunter
1982, Sedimentology (29) 121-138
Where bedforms migrate during deposition, they move upward (climb) with respect to the generalized sediment surface. Sediment deposited on each lee slope and not eroded during the passage of a following trough is left behind as a cross-stratified bed. Because sediment is thus transferred from bedforms to underlying strata, bedforms...
Amino acid geochemistry of fossil bones from the Rancho La Brea asphalt deposit, California
M.A.S. McMenamin, D.J. Blunt, K.A. Kvenvolden, Scott Miller, L.F. Marcus, R.R. Pardi
1982, Quaternary Research (18) 174-183
Low aspartic acid d:l ratios and modern collagenlike concentration values indicate that amino acids in bones from the Rancho La Brea asphalt deposit, Los Angeles, California are better preserved than amino acids in bones of equivalent age that have not been preserved in asphalt. Amino acids were recovered from 10 Rancho...
Seismic reflection study of recessional moraines beneath Lake Superior and their relationship to regional deglaciation
C.W. Landmesser, T.C. Johnson, R. J. Wold
1982, Quaternary Research (17) 173-190
Approximately 8000 km of continuous seismic reflection profiles throughout Lake Superior were examined for evidence of recessional moraines and other ice-margin deposits associated with the retreat of late Wisconsin ice. These features are correlated with the record of glacial-lake evolution in western Lake Superior. An offlapping sequence of glacial and...
Comparisons of 210Pb and pollen methods for determining rates of estuarine sediment accumulation
G. S. Brush, E.A. Martin, R.S. DeFries, C. A. Rice
1982, Quaternary Research (18) 196-217
Comparisons of sedimentation rates obtained by 210Pb and pollen analyses of 1-m cores collected throughout the Potomac Estuary show good agreement in the majority of cores that can be analyzed by both methods. Most of the discrepancy between the methods can be explained by the analytical precision of the 210Pb method and...
A climate-related oxidizing event in deep-sea sediment from the Bering Sea
J.V. Gardner, W.E. Dean, D.H. Klise, J.G. Baldauf
1982, Quaternary Research (18) 91-107
Many cores from the deep basins of the Bering Sea have a thin oxidized zone within otherwise reduced sediment. This oxidized zone began to form about 6000 yr ago and represents an interval of about 3200 yr. Mineralogically, the oxidized and reduced sediments are similar, but chemically they differ. Concentrations...
Ichnofossils and rhizoliths of the nearshore fluvial Jebel Qatrani Formation (Oligocene), Fayum Province, Egypt
T. M. Bown
1982, Palaeogeography, Palaeoclimatology, Palaeoecology (40) 255-309
The ichnofossils and rhizoliths of the Oligocene Jebel Qatrani Formation of Egypt are among the best preserved, most diverse in form, and most abundant of such structures yet recognized in fluvial rocks. Twenty-one forms are described. The ichnofauna contains traces (domichnia, fodinichnia, cubichnia) of probable annelid, insect, crustacean, and vertebrate...
The occurrence and fission-track ages of late neogene and quaternary volcanic sediments, Siwalik group, Northern Pakistan
G.D. Johnson, P. Zeitler, C. W. Naeser, N.M. Johnson, D.M. Summers, C.D. Frost, N.D. Opdyke, R.A.K. Tahirkheli
1982, Palaeogeography, Palaeoclimatology, Palaeoecology (37) 63-93
Volcanic sediments, now mostly bentonites and bentonitic mudstones, occur throughout the Late Neogene and Quaternary Siwalik Group of northern Pakistan. A number of these deposits have been dated by the fission-track method, utilizing zircon phenocrysts from these deposits, and provide the chronometric constraints upon which a paleomagnetic stratigraphy is developed...
Chronology of late Wisconsinan glaciation in middle North America
L. Clayton, S.R. Moran
1982, Quaternary Science Reviews (1) 55-82
We propose a chronology of late Wisconsinan glacial fluctuations in middle North America, from Alberta to Wisconsin, based on radiocarbon dates derived solely from wood. Previous chronologies of the southwestern margin of the North American Continental Ice Sheet have depended to a considerable degree on radiocarbon dates from fine-grained organic...
An oilspill trajectory analysis model with a variable wind deflection angle
W.B. Samuels, N.E. Huang, D.E. Amstutz
1982, Ocean Engineering (9) 347-360
The oilspill trajectory movement algorithm consists of a vector sum of the surface drift component due to wind and the surface current component. In the U.S. Geological Survey oilspill trajectory analysis model, the surface drift component is assumed to be 3.5% of the wind speed and is rotated 20 degrees...
Photogrammetric application of Viking Orbital photography
S.S.C. Wu, A.A. Elassal, R. Jordan, F.J. Schafer
1982, Planetary and Space Science (30) 45-55
Special techniques are described for the photogrammetric compilation of topographic maps and profiles from stereoscopic photographs taken by the two Viking Orbiter spacecraft. These techniques were developed because the extremely narrow field of view of the Viking cameras precludes compilation by conventional photogrammetric methods. The techniques adjust for internal consistency...
An electric-analog simulation of elliptic partial differential equations using finite element theory
O.L. Franke, G.F. Pinder, E.P. Patten
1982, Mathematics and Computers in Simulation (24) 65-71
Elliptic partial differential equations can be solved using the Galerkin-finite element method to generate the approximating algebraic equations, and an electrical network to solve the resulting matrices. Some element configurations require the use of networks containing negative resistances which, while physically realizable, are more expensive and time-consuming to construct....
Water resources data, Indiana, water year 1981
Water Resources Division, U.S. Geological Survey
1982, Water Data Report IN-81-1
Water resources data for the 1981 water year for Indiana consists of records of stage, discharge, and water quality of streams; stage and contents of lakes and reservoirs; and water levels in wells. This report contains discharge records for 195 gaging stations, stage and contents for 12 lakes and reservoirs,...
Mitigation and enhancement techniques for the Upper Mississippi River system and other large river systems
Rosalie A. Schnick, John M. Morton, Jeffrey C. Mochalski, Jonathan T. Beall
1982, Resource Publication 149
Extensive information is provided on techniques that can reduce or eliminate the negative impact of man's activities (particularly those related to navigation) on large river systems, with special reference to the Upper Mississippi River. These techniques should help resource managers who are concerned with such river systems to establish...