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Page 5453, results 136301 - 136325

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Development of the benethic nepheloid layer on the south Texas continental shelf, western Gulf of Mexico
Gerald L. Shideler
1981, Marine Geology (41) 37-61
A monitoring study of suspended sediment on the South Texas Continental Shelf indicates that a turbid benthic nepheloid layer is regionally persistent. A sequence of quasi-synoptic measurements of the water column obtained during six cruises in an 18-month period indicates substantial spatial and temporal variability in nepheloidlayer characteristics. Regionally, the...
Reservoir analysis of the Denver earthquakes: A case of induced seismicity
Paul A. Hsieh, John D. Bredehoeft
1981, Journal of Geophysical Research D: Atmospheres (86) 903-920
Injection of fluid wastes into the fractured Precambrian crystalline bedrock beneath the Rocky Mountain Arsenal near Denver triggered earthquakes in the 1960's. An analysis, based on the assumption that fluid flow in the fractured reservoir can be approximated by flow in a porous medium, is presented. The configuration and hydrologic...
Encounter with Saturn: Voyager 1 imaging science results
B.A. Smith, L. Soderblom, R. Beebe, J. Boyce, G. Briggs, A. Bunker, S.A. Collins, C.J. Hansen, T. V. Johnson, J.L. Mitchell, R.J. Terrile, M. Carr, A.F. Cook II, J. Cuzzi, James B. Pollack, G. Edward Danielson, A. Ingersoll, M. E. Davies, G.E. Hunt, H. Masursky, E. Shoemaker, D. Morrison, Tobias Owen, C. Sagan, J. Veverka, R. Strom, V.E. Suomi
1981, Science (212) 163-191
As Voyager 1 flew through the Saturn system it returned photographs revealing many new and surprising characteristics of this complicated community of bodies. Saturn's atmosphere has numerous, low-contrast, discrete cloud features and a pattern of circulation significantly different from that of Jupiter. Titan is shrouded in a...
Return of the gray wolf to Wisconsin
L. David Mech, R. M. Nowak
1981, American Midland Naturalist (105) 408-409
Five gray wolf (Canis lupus) specimens were examined from Wisconsin from 1975 through 1979; each had been killed by human beings, accidentally or intentionally. This confirms the presence of wolves in Wisconsin and supports the hypothesis that human-related mortality is the factor limiting the population....
Response of adult mallard ducks to ingested South Louisiana crude oil
Nancy C. Coon, Michael P. Dieter
1981, Environmental Research (24) 309-314
Adult mallards (Anas platyrhynchos) were fed South Louisiana crude oil as 0.25 and 2.5% of the total diet for 26 weeks to assess the chronic effects of oil ingestion. Additional birds were fed diets containing either 1.0% of a paraffin mixture or clean feed. No birds died during the study,...
Species differences in hematological values of captive cranes, geese, raptors, and quail
George F. Gee, James W. Carpenter, Gary L. Hensler
1981, Journal of Wildlife Management (45) 463-483
Hematological and serum chemical constituents of blood were determined for 12 species, including 7 endangered species, of cranes, geese, raptors, and quail in captivity at the Patuxent Wildlife Research Center. Means, standard deviations, analysis of variance by species and sex, and a series of multiple comparisons of means were derived...
Mineralogy and composition of concentric layers within a manganese nodule from the North Pacific Ocean
D.Z. Piper, M.E. Williamson
1981, Marine Geology (40) 255-268
The minor-element composition of concentric layers within a single ferromanganese nodule from the eastern North Pacific exhibits strong correlations with Fe and Mn contents but appears to be independent of pronounced mineralogic variations. On the basis of these correlations, the elemental composition of individual layers apparently is controlled by the...
Exploration decisions and firms in the mineral industries
E. D. Attanasi
1981, Energy Economics (3) 105-112
The purpose of this paper is to demonstrate how physical characteristics of deposits and results of past exploration enter future exploration decisions. A proposed decision model is presented that is consistent with a set of primitive probabilistic assumptions associated with deposit size distributions and discoverability. Analysis of optimal field exploration...
Suspected Great Blue Heron population decline after a severe winter in the Columbia Basin
Lawrence J. Blus, Charles J. Henny
1981, Murrelet (62) 16-18
The wintering range of the Great Blue Heron (Ardea herodias) extends further north than does that of any other member of the Ciconiiformes in North America. The northern limits of its range extend along the Pacific coast into southeastern Alaska, into Massachusetts on the Atlantic coast, and inland into...
Polychlorinated biphenyl (Aroclor (R) 1254) residues in rainbow trout: Effects on sensitivity to nine fishery chemicals
T.D. Bills, L. L. Marking, W.L. Mauck
1981, North American Journal of Fisheries Management (1) 200-203
The influence of background polychlorinated biphenyl (PCB) residues in rainbow trout (Salmo gairdneri) on the susceptibility of the fish to nine chemicals routinely or occasionally used in fishery operations was evaluated. Rainbow trout fry were divided into three groups: one was exposed to 0.01 ppb and another to 0.1 ppb...
Volcanic origin of the eruptive plumes on Io
A. F. Cook, E.M. Shoemaker, B.A. Smith, G. E. Danielson, T. V. Johnson, S.P. Synnott
1981, Science (212) 1419-1422
A quadruple long exposure of Io in eclipse exhibits faint auroral emission from the eruptive plumes. No luminous spots in the vents, predicted by Gold, were observed. Heat from the interior of Io appears to be the predominant source of energy in the plumes....
Permian and Triassic rocks near Quinn River Crossing, Humboldt County, Nevada
Keith B. Ketner, Bruce R. Wardlaw
1981, Geology (9) 123-126
Permian and Triassic rocks near Quinn River Crossing, Humboldt County, Nevada, consist of four structural blocks: (1) a Lower Permian volcanic block; (2) a Permian(?) chert-arenite block; (3) a Lower Permian limestone block; and (4) a Permian and Triassic block. The contacts between the Permian volcanic block and the others...
Dark CO2-fixation and diurnal malic acid fluctuations in the submerged-aquatic Isoetes storkii
Jon E. Keeley, B. Morton, B. Babcock, P. Castillo, B. Fish, E. Jerauld, B. Johnson, L. Landre, H. Lum, C. Miller, A. Parker, G. Van Steenwyk
1981, Oecologia (48) 332-333
In the leaves (but not corms) of the submerged aquatic Isoetes storkii malic acid concentration fluctuated from 22 μeg g FW-1 in the evening to 171 μeg g FW-1 in the morning. Associated with this was a change in titratable acidity of 152 μeg g FW-1 between morning and evening. 14C carbon was fixed in both...
Geology and concepts of genesis of important types of uranium deposits
J. Thomas Nash, H.C. Granger, S.S. Adams
1981, Book chapter, Economic Geology, Seventy-Fifth Anniversary Volume
Uranium ore deposits occur in nearly every major rock type in the earth’s crust, and nearly all igneous, metamorphic, and sedimentary processes are capable of concentrating or dispersing uranium. However, only three types of deposits account for more than 70 percent of known Western World Reasonably Assured Resources (WWRAR): Precambrian...
Pacific Coast coccolith stratigraphy between Point Conception and Cabo Corrientes, Deep Sea Drilling Project Leg 63
David Bukry
1981, Initial Reports of the D.S.D.P. (63) 445-471
DSDP Leg 63 recovered Neogene coccoliths from south of Point Conception, California (Site 467), to north of Cabo Corrientes, Mexico (Site 473), as part of a traverse exploring the sedimentary record of the California Current along the Pacific Coast. A combination of temperate and tropical zonations were used to date...
Silicoflagellate stratigraphy of offshore California and Baja California, Deep Sea Drilling Project, Leg 63.
David Bukry
1981, Initial Reports of the D.S.D.P. (63) 539-557
Quantitative study of middle and upper Miocene silicoflagellate assemblages from Pacific Coast Sites 467 and 469 to 472 has permitted identification of warm- and temperate-water biostratigraphic zones and the formulation of a model for relative paleotemperature values (Ts) on the basis of warm- and temperate-genera abundances. Geographic and temporal trends...