World petroleum resource estimates and production forecasts: Implications for government policy
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 comparison of ground response in the Los Angeles region from nuclear explosions and the 1971 San Fernando earthquake
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....
Aeromagnetic and radio echo ice-sounding measurements show much greater area of the Dufek intrusion, Antarctica
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...
Recurrent intraplate tectonism in the New Madrid seismic zone
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....
Time-lapse cameras as an aid in studying grizzly bears in northwest Wyoming
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....
Factors influencing human-grizzly bear interactions in a backcountry setting
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...
Biological considerations in the delineation of critical habitat
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...
Movements of radio-instrumented grizzly bears within the Yellowstone area
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...
Arctic oceanic climate in late Cenozoic time
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. ...
Sediment waves on the Monterey fan levee: a preliminary physical interpretation.
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...
Small-format cameras and fine-grain film used for waterfowl population studies
Edgar L. Ferguson, David S. Gilmer
1980, Journal of Wildlife Management (44) 691-694
No abstract available. ...
Food use and nutrition of black ducks nesting in Maine
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...
On the variability of alligator sex ratios
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...
Effect of delayed reporting of band recoveries on survival estimates
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....
Channelization and livestock impacts on salmonid habitat and biomass in western Washington
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...
Neogene sedimentation on the outer continental margin, southern Bering Sea
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...
Platinum metals in magmatic sulfide ores
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...
Aeromagnetic and gravity surveys in the Coso Range, California
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,...
Transfer of crude oil from contaminated water to bird eggs
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...
Pollution ecology of breeding great blue herons in the Columbia Basin, Oregon and Washington
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,...
Comments and replies on ‘Collision-deformed Paleozoic continental margin, western Brooks Range, Alaska’: Reply
Michael Churkin, Warren J. Nokleberg
1980, Geology (8) 356-357
No abstract available....
Main image file tape description
Howard W. Warriner
1980, Report
This Main Image File Tape document defines the data content and file structure of the Main Image File Tape (MIFT) produced by the EROS Data Center (EDC). This document also defines an INQUIRY tape, which is just a subset of the MIFT. The format of the INQUIRY tape is identical...
Late Cenozoic volcanism, geochronology, and structure of the Coso Range, Inyo County, California
Wendell A. Duffield, Charles R. Bacon, G. Brent Dalrymple
1980, Journal of Geophysical Research B: Solid Earth (85) 2381-2404
The Coso Range lies at the west edge of the Great Basin, adjacent to the southern part of the Sierra Nevada. A basement complex of pre‐Cenozoic plutonic and metamorphic rocks is partly buried by ∼35 km3 of late Cenozoic volcanic rocks that were erupted during two periods, as defined by K‐Ar...
Stability of sulfur slopes on Io
Gary D. Clow, M. H. Carr
1980, Icarus (44) 268-279
The mechanical properties of elemental sulfur are such that the upper crust of Io cannot be primarily sulfur. For heat flows in the range 100–1000 ergs cm−2, sec−1, sulfur becomes ductile within several hundred meters of the surface and would prevent the formation of calderas with depths greater than this....
Environmental stratification — A method to improve Landsat digital analysis accuracy and land cover map utility
L. R. Pettinger
1980, Conference Paper, Proceedings of the 14th International Symposium on Remote Sensing of the Environment
No abstract available....
