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...
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...
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...
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...
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. ...
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...
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. ...
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....
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,...
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,...
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...
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....
Sediment transport in Norton Sound, Alaska
D.E. Drake, D.A. Cacchione, R.D. Muench, C.H. Nelson
1980, Marine Geology (36) 97-126
The Yukon River, the largest single source of Bering Sea sediment, delivers > 95% of its sediment load at the southwest comer of Norton Sound during the ice-free months of late May through October. During this period, surface winds in the northern Bering Sea area are generally light from the...
Allochthonous Jurassic ophiolite in northwest Washington
John T. Whetten, R. E. Zartman, Richard J. Blakely, David L. Jones
1980, GSA Bulletin (91) 359-368
Fragments of Jurassic ophiolite having U-Pb zircon ages narrowly grouped at 160 to 170 m.y. are widespread over parts of northwest Washington. The Haystack thrust fault is inferred to mark the base of the ophiolite in the San Juan Islands and adjacent Cascade foothills; other bodies of mafic and ultramafic...
Need for new sensors to map lithologic units
Lawrence C. Rowan
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 106-107
One of the most important contributions that remote sensing can make to mineral energy explorations to provide data from satellites to augment regional geological mapping. Geologic maps, which show information on the subsurface, are the main basis for formulating models of resource genesis that guide exploration. However, conventional...
Detection and modeling of subsurface coal oxidation
Leo S. Leonhart, William O. Rasmussen
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 83-83
The oxidation and sustained ignition of coal and coaly wastes within surface coal mine spoils in the southwestern U.S. have hampered the success of reclamation efforts at these locations. To assess better the magnitude, depth, geometry, and dynamics of the oxidation process thermal infrared remote sensing data have been...
Integration of geological, geochemical, and geophysical spatial data of the Cement oil field, Oklahoma, test site
Patricia A. Termain, Terrence J. Donovan, Pat S. Chavez
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 57-57
Measurement pertaining to geology, geochemistry, and geophysics of the Cement oil field, Oklahoma, test site were collected employing both airborne sensors and ground-based data collection. The measurements include: (1) airborne gamma-ray spectrometry (supplying bismuth 214, thalium 208, and potassium 40 gamma-ray intensities); (2) aeromagnetic survey data; (3) multi-frequency airborne resistivity...
Considerations for blending data from various sensors
Brian P. Bauer
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 56-56
A project is being proposed at the EROS Data Center to blend the information from sensors aboard various satellites. The problems of, and considerations for, blending data from several satellite-borne sensors are discussed. System descriptions of the sensors aboard the HCMM, TIROS-N, GOES-D, Landsat 3, Landsat D, Seasat,...
