G.V.N. Powell, D.C. Gray
1980, Journal of Wildlife Management (44) 918-921
No abstract available. ...
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Publication Extents
Not all publications have extents, not all extents are completely accurateDonald T. Secor
1980, Open-File Report 81-380
No abstract available....
David G. Howell, James K. Crouch, H. G. Greene, David S. McCulloch, J. G. Vedder
1980, Book chapter, Sedimentation in Oblique-Slip Mobile Zones
Along the Californian margin of the North American plate, the configuration and structural stability of late Mesozoic and Cainozoic basins are related to plate kinematics. Three tectonic regimes are recorded; orthogonal high-angle subduction, oblique low-angle subduction, and transform slip. During the first, regionally extensive forearc basins...
Juergen Reinhardt, Thomas G. Gibson, Thorton L. Neathery, Robert W. Frey
1980, Book chapter, Excursions in Southeastern geology
No abstract available. ...
William B. Fleck
1980, Report
Washteaw County is underlain by glacial deposits that range in thickness from about 50 feet to about 450 feet. Underlying the glacial deposits are sedimentary rocks of Mississippian and Devonian age. The youngest of these rocks are the sandstones of the Marshall Formation in the western part of the county; ...
David H. Root, Emil D. Attanasi
1980, Natural Resources Forum (4) 181-196
Resource estimates alone will not give advance warning of encroaching production difficulties. An analysis of the general stages in the evolution of petroleum production and discovery and of industry statistics provides an estimate of when the stage characterised by increasing production in the market economy countries outside the United States...
A. M. Rogers, P. A. Covington, Roger D. Borcherdt
1980, Conference Paper, Proceedings of the seventh World Conference on Earthquake Engineering Istanbul, Turkey, 1980
No abstract available....
John C. Behrendt, D.J. Drewry, E. Jankowski, M. S. Grim
1980, Science (209) 1014-1017
A combined aeromagnetic and radio echo ice-sounding survey made in 1978 in Antarctica over the Dufek layered mafic intrusion suggests a minimum area of the intrusion of about 50,000 square kilometers, making it comparable in size with the Bushveld Complex of Africa. Comparisons of the magnetic and...
Mark D. Zoback, R. M. Hamilton, A. J. Crone, D. P. Russ, F. A. McKeown, S.R. Brockman
1980, Science (209) 971-976
For the first time, New Madrid seismicity can be linked to specific structural features that have been reactivated through geologic time. Extensive seismic reflection profiling reveals major faults coincident with the main earthquake trends in the area and with structural deformation apparently caused by repeated episodes of igneous activity....
Ronald E. Ball
1980, Book chapter, Bears: Their biology and management
Time-lapse cameras were effective for gathering limited distribution and population data on grizzly bears (Ursus arctos) and black bears (Ursus americanus) in northwest Wyoming. Thirty-six stations, each consisting of a camera and a lure, were monitored for 551 camera-days; 83 rolls of film were exposed. Five different lures were tested....
James M. Chester
1980, Book chapter, Bears: Their biology and management
Interactins between humans and 7 species of wildlife, including grizzly bears (Ursus arctos horribilis), were investigated in backcountry areas of the Gallatin Range, Yellowstone National Park, during the summers of 1973 and 1974. Grizzly bear distribution, movements, and behavior and human behavior were examined. Because grizzlies utilized areas with elevations...
Steven L. Judd, Richard R. Knight
1980, Book chapter, Bears: Their biology and management
Grizzly bear (Ursus arctos horribilis) movement patterns were studied with the aid of 18 radio-instrumented grizzly bears in 1975 and 1976. Five bears gave minimal information because of death, transmitter failure, or loss of transmitters. Seasonal home range information is presented for 13 bears. Two bears, trapped inside Yellowstone National...
Richard R. Knight
1980, Book chapter, Bears: Their biology and management
Grizzly bears (Ursus arctos) require large areas to satisfy their needs for food, cover, and space. They thrive best where disturbance by man is minimal. It is not a coincidence that the two major grizzly bear populations in the lower 48 states exist in large wilderness systems closely associated with...
William R. Normark, Gordon R. Hess, D.A.V. Stow, A.J. Bowen
1980, Marine Geology (37) 1-18
Sediment waves on the deep ocean floor occur mostly on the lower continental rise on slopes of 1° or less. Previous studies show that their amplitude and wavelength vary greatly, but little is known about their shape in plan. A detailed survey of a 30-km2 area of abyssal-depth sediment waves associated...
Y. Herman, D.M. Hopkins
1980, Science (209) 557-562
Faunal and lithologic evidence is used to reconstruct paleoceanographic events over the last 4.5 million years. The inception of perennial sea-ice cover is dated at about 0.7 million years. ...
Kenneth J. Reinecke, Ray B. Owen Jr.
1980, Journal of Wildlife Management (44) 549-558
Based on 32 adult black ducks (Anas rubripes) collected during the nesting seasons of 1974-76, the proportion of macro invertebrates (as aggregate [average] percent of dry weight) in the diet of males, egg-laying females, and postlaying females was 60, 75, and 55%, respectivey. Sample sizes were small, and the differences...
Edgar L. Ferguson, David S. Gilmer
1980, Journal of Wildlife Management (44) 691-694
No abstract available. ...
James D. Nichols, R. H. Chabreck
1980, American Naturalist (116) 125-137
Samples of alligators from wild and 'farm' populations exhibited disproportionate sex ratios. Males predominated among young alligators from wild populations, whereas females were much more abundant than males in the farm population, where resources were superabundant. These results and other considerations lead us to hypothesize that environmental factors...
David R. Anderson, Kenneth P. Burnham
1980, Journal of Field Ornithology (51) 244-247
Brownie et al. (U.S. Fish and Wildl. Serv., Resource Publ. 131, 1978) presented 14 models based on an array of explicit assumptions for the study of survival in avian populations. These methods are replacing the life table methods previously used to estimate survival rates (e.g., Burnham and Anderson, J....
D.W. Chapman, E. Knudsen
1980, Transactions of the American Fisheries Society (109) 357-363
We examined salmonid habitat and biomasses in 50–70‐m pairs of altered and control sections of small (discharges less than 0.3 m3second−1) streams around Puget Sound in western Washington in 1978–1979. Altered sections had been channelized or used by livestock. Channelization significantly reduced overhead cover, sinuosity, wetted area, and woody bank...
T.L. Vallier, M.B. Underwood, J.V. Gardner, J.A. Barron
1980, Marine Geology (36) 269-287
Neogene sedimentary rocks and sediments from sites on the outer continental margin in the southern Bering Sea and on the Alaska Peninsula are dominated by volcanic components that probably were eroded from an emergent Aleutian Ridge. A mainland continental source is subordinate. Most sediment in the marine environment was transported...
A.J. Naldrett, J.M. Duke
1980, Science (208) 1417-1424
Platinum-group elements (PGE) are mined predominantly from deposits that have formed by the segregation of molten iron-nickel-copper sulfides from silicate magmas. The absolute concentrations of PGE in sulfides from different deposits vary over a range of five orders of magnitude, whereas those of other chalcophile elements vary by factors of...
Donald Plouff, W.F. Isherwood
1980, Journal of Geophysical Research B: Solid Earth (85) 2491-2501
The effect of an underlying magma reservoir cannot be identified within the complex gravity pattern in the Coso Range, California. Rather, linear gravity contours, which suggest a regional tectonic origin, enclose the location of most of the volcanic activity of the Coso Range. Faults along the edges of northwest trending,...
P.H. Albers
1980, Environmental Research (22) 307-314
Paris of breeding mallard ducks were exposed to oiled water for 2 days during the first week of incubation. Hatching success of ducks exposed to 100 ml of Prudhoe Bay crude oil per square meter of water surface was significantly less than that of controls. Hatching success of ducks exposed...
L. J. Blus, Charles J. Henny, T. E. Kaiser
1980, Murrelet (61) 63-71
Approximately 40 pairs of Great Blue Herons (Ardea herodias) formerly nested in trees on or near Blalock Island about 95 km downstream from Richland, Washington, in the Columbia River (Nehls 1972 ). In conjunction with construction of the John Day Lock and Dam and before creating Lake Umatilla in 1968,...