Crustal processes of the Mid-Ocean Ridge
Richard D. Ballard, H. Craig, J. Edmond, M. Einaudi, R. Holcomb, H.D. Holland, C.A. Hopson, B.P. Luyendyk, K. Macdonald, J. Morton, J. Orcutt, N. Sleep
1981, Science (213) 31-40
Independent geological and geophysical investigations of the Mid-Ocean Ridge system have begun to focus on the nature of the magma chamber system underlying its central axis. Thermal models predict the existence of a steady-state chamber beneath a thin crustal lid ranging in thickness from 2 to 13...
Processes controlling the characteristics of the surficial sand sheet, U.S. Atlantic outer continental shelf
Harley J. Knebel
1981, Marine Geology (42) 349-368
A review of recent data on the velocity of bottom currents, the frequency of bottom-sediment movement, the kinds and amounts of suspended sediments in near-bottom waters, and the acoustic and sedimentary features of subbottom strata indicates that the characteristics of the ubiquitous sand sheet on the Atlantic outer continental shelf...
Foods of prairie raccoons during the waterfowl nesting season
Raymond J. Greenwood
1981, Journal of Wildlife Management (45) 754-760
No abstract available. ...
How to order maps on microfilm
Water Resources Division, U.S. Geological Survey
1981, Report
The collection comprises over 120,000 maps, including some 15-minute quadrangle maps compiled by the U.S. Army Corps of Engineers, National Parks and Monument maps, River Survey maps, and selected Federal Highway Administration county planning maps. The collection will continue to grow as other types of maps are added....
Environmental metal residues in tissues of canvasbacks
W. James Fleming
1981, Journal of Wildlife Management (45) 508-511
Reduction and deterioration of habitat and high nest predation have contributed to the decline of the continental populations of canvasbacks (Aythya valisineria) (Trauger 1974). Environmental metal contaminants also may adversely affect reproduction and survival of waterfowl (Heinz 1974, 1976a,b, 1979; Finley and Stendell 1978). White et al. (1979) ex-...
Use of captive starlings to determine effects of pollutants on passerine reproduction
C.E. Grue, C.L. Christian
D.W. Lamb, E.E. Kenaga, editor(s)
1981, Book chapter, Avian and Mammalian Wildlife Toxicology: Second Conference: A symposium
Three reproductive trials were conducted to develop techniques for propagation of captive starlings (Stumus vulgaris) which could determine the effects of environmental contaminants on passerine reproduction. Trials were conducted during the spring of 1979 in five adjacent 2.4 by 3 by 12-m outdoor wire pens containing four or ten pairs...
Population dynamics and bioenergetics of a fossorial herbivore, Thomomys talpoides (Rodentia: Geomyidae), in a spruce-fir sere
Douglas C. Andersen, James A. MacMahon
1981, Ecological Monographs (51) 179-202
Studies of the bioenergetics of the northern pocket gopher, Thomomys talpoides, are coupled with data on demography, activity budgets, and microclimates to model the energy requirements of individuals and populations in the Wasatch Mountains of Utah during 1976-1979. Metabolic rates during rest increased linearly with decreasing ambient temperature, but...
Zooplankton fecal pellets link fossil fuel and phosphate deposits
K.G. Porter, E. I. Robbins
1981, Science (212) 931-933
Fossil zooplankton fecal pellets found in thinly bedded marine and lacustrine black shales associated with phosphate, oil, and coal deposits, link the deposition of organic matter and biologically associated minerals with planktonic ecosystems. The black shales were probably formed in the anoxic basins of coastal marine waters,...
Petrographic and chemical characteristics of pyrite-marcasite mineralization in hole 465A, southern Hess Rise
Randolph A. Koski, James R. Hein
1981, Initial reports of the Deep Sea Drilling Project (62) 855-862
Core recovered from Hess Rise contains concentrations of pyrite, marcasite, and barite in the lowermost meter of limestone (Unit II) and in the brecciated upper part of the underlying volcanic basement (Unit HI). Petrographic and chemical data indicate that the sulfide-barite assemblage in the limestone is mainly a product of...
Origin of organic-carbon-rich mid-Cretaceous limestones, Mid-Pacific Mountains and southern Hess Rise
Walter E. Dean, George E. Claypool, Jorn Thiede
1981, Initial reports of the Deep Sea Drilling Project (62) 877-890
Limestones of mid-Cretaceous age containing as much as 8.6 percent organic carbon were cored at one site (463) in the Mid-Pacific Mountains and at two sites (465, 466) on southern Hess Rise, central North Pacific Ocean, during Leg 62 of the Deep Sea Drilling Project. In the Mid-Pacific Mountains, three...
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...
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...
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...
The Saudi Arabian Deputy Ministry for Mineral Resources Remote Sensing Center : services and applications of Landsat Data
Kenneth P. Ferguson Jr., Water Resources Division, U.S. Geological Survey, Saudi Arabia. Deputy Ministry for Mineral Resources
1981, Report
Test and design of automatic fluvial suspended-sediment samplers
J. V. Skinner, J.P. Beverage
1981, Report
No abstract available....
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...
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...
An empirical methodology for estimating entrainment losses at power plants sited on estuaries
J. Boreman, C.P. Goodyear, S.W. Christensen
1981, Transactions of the American Fisheries Society (110) 253-260
A model based on empirically derived age‐, time‐, and space‐variant entrainment susceptibility data may be used for estimating conditional entrainment mortality of aquatic organisms, particularly fish and shellfish, caused by operation of one or more power plants on an estuary. Model application requires knowledge of the morphometry of the water...
Arctic Outer Continental Shelf orders governing oil and gas lease operations
Water Resources Division, U.S. Geological Survey
1981, Report
No abstract available....
“Influence of Well Water Quality Variability on Sampling Decisions and Monitoring,” by Harry I. Nightingale and William C. Bianchi
Leonard F. Konikow
1981, Journal of the American Water Resources Association (JAWRA) (17) 145-146
No abstract available....
The effect of snowmelt on the water quality of Filson Creek and Omaday Lake, northeastern Minnesota
D. I. Siegel
1981, Water Resources Research (17) 238-242
Sulfate concentration and pH were determined in surface water, groundwater, and precipitation samples collected in the Filson Creek watershed to evaluate the sources of sulfate in Filson Creek. During and immediately after snowmelt, sulfate concentrations in Filson Creek increased from about 2 to 14 mg/l. Concurrently, H+ ion activity increased from an...
The geologic history of the Mid-Pacific Mountains in the central North Pacific Ocean; A synthesis of deep-sea drilling studies
Jorn Thiede, Walter E. Dean, David K. Rea, T.L. Vallier, Charles Adelseck
1981, Initial Reports of the D.S.D.P. (62) 1073-1120
The Mid-Pacific Mountains constitute one of the largest aseismic rises in the central North Pacific Ocean. They have been generated by mid-plate volcanic events prior to Barremian time, but their volcanic activity continued through the remainder of the Cretaceous. Evidence of the latest stages of this volcanism are the trachytic...
The geology of Hess Rise, central north Pacific Ocean
T. L. Vallier, David K. Rea, Walter E. Dean, Jorn Thiede, Charles Adelseck
1981, Initial Reports of the D.S.D.P. (62) 1031-1072
The geology of Hess Rise is interpreted from studies of morphology and structure, igneous petrology, sediment lithofacies, seismic stratigraphy, and paleoenvironments. Hess Rise probably formed at a triple junction, between 116 and 95 m.y. ago, in the equatorial zone of the southern hemisphere. A large archipelago, formed by volcanism, subsequently...
Water resources data for Washington
Water Resources Division, U.S. Geological Survey
1981, Report
Water resources data
Water Resources Division, U.S. Geological Survey
1981, Report, U.S. Geological Survey water-supply paper
No abstract available....
