Deep-water facies of the Lisburne Group, west-central Brooks Range, Alaska
Julie A. Dumoulin, Anita G. Harris, Jeanine M. Schmidt
Dennis K. Thurston, Kazuya Fujita, editor(s)
1992, Conference Paper, Proceedings: 1992 international conference on Arctic margins (MMS 94-0040)
Deep-water lithofacies of the Lisburne Group (chiefly Carboniferous) occur in thurst sheets in the western part of the foreland fold-and-thrust belt of the Brooks Range and represent at least three discrete units. The Kuna Formation (Brooks Range allochthon) consists mostly of spiculitic mudstone and lesser shale; subordinate carbonate layers are...
Correlation of pre-Carboniferous carbonate successions of northern Alaska
Julie A. Dumoulin, Anita G. Harris
Dennis K. Thurston, Kazuya Fujita, editor(s)
1992, Conference Paper, Proceedings: 1992 international conference on Arctic margins (MMS 94-0040)
Fault-bounded successions of pre-Carboniferous (meta)carbonate rocks occur throughout northern Alaska. Successions studied in detail are those in the York Mountains (Seward Peninsula), the western and eastern Baird Mountains (western Brooks Range), the Snowden Mountain area (central Brooks Range), and the Sublik and Sadlerochit Mountains (eastern Brooks range); they are correlated...
Annual survival rates of adult and immature eastern population tundra swans
James D. Nichols, J. Bart, Roland J. Limpert, William J.L. Sladen, James E. Hines
1992, Journal of Wildlife Management (56) 485-494
Tundra swans (Cygnus columbianus) of the eastern population were neckbanded in Maryland, North Carolina, and Alaska from 1966 through 1990. These swans were resighted and recaptured during autumn, winter, and spring, 1966-1990. Although the original motivation for this study involved swan movements, we wanted to use the resulting data to...
Identification of viral hemorrhagic septicemia virus isolated from Pacific cod Gadus macrocephalus in Prince William Sound Alaska, USA
T.R. Meyers, J. Sullivan, E. Emmenegger, J. Follett, S. Short, W.N. Batts, J. R. Winton
1992, Diseases of Aquatic Organisms (12) 167-175
Ulcerative slun tissues from 2 Pacific cod Gadus rnacrocephalus caught in Prince William Sound, Alaska, USA, were examined for virus by Fish Pathology staff within the F.R.E.D. Division of the Alaska Department of Fish and Game. Six days after inoculation of Epitheliorna papulosum cyprini (EPC) cells at 14"C, diffuse rounding...
A mid-Permian chert event: Widespread deposition of biogenic siliceous sediments in coastal, island arc and oceanic basins
B.L. Murchey, D. L. Jones
1992, Palaeogeography, Palaeoclimatology, Palaeoecology (96) 161-174
Radiolarian and conodont of Permian siliceous rocks from twenty-three areas in teh the circum-Pacific and Mediterranean regions reveal a widespread Permian Chert Event during the middle Leonardian to Wordian. Radiolarian- and (or) sponge spicule-rich siliceous sediments accumulated beneath high productivity zones in coastal, island arc and oceanic basins. Most of...
Application of continuum models to deformation of the Aleutian Island Arc
Eric L. Geist, David W. Scholl
1992, Journal of Geophysical Research Solid Earth (97) 4953-4967
Continuum models were constructed to describe large‐scale deformation of the Aleutian Island Arc over the past 5 m.y. These models consider the island arc as a continuum in the horizontal plane with the velocity boundary condition at the Pacific edge stated as a fraction of Pacific plate convergence transferred to...
Thin, low‐velocity crust beneath the southern Yukon‐Tanana Terrane, east central Alaska: Results from Trans‐Alaska crustal transect refraction/wide‐angle reflection data
Bruce C. Beaudoin, Gary S. Fuis, Walter D. Mooney, Warren J. Nokleberg, Nikolas I. Christensen
1992, Journal of Geophysical Research B: Solid Earth (97) 1921-1942
A seismic refraction/wide‐angle reflection survey for the Trans‐Alaska Crustal Transect program reveals a thin, reflective crust beneath the southern Yukon‐Tanana terrane (YTT) in east central Alaska. These data are the first detailed refraction survey of the southern YTT and compose a 130‐km‐long reversed profile along the Alaska...
Evidence for cenozoic crustal extension in the Bering Sea region
Alan K. Cooper, M. S. Marlow, D.W. Scholl, A.J. Stevenson
1992, Tectonics (11) 719-731
Geophysical and regional geologic data provide evidence that parts of the oceanic crust in the abyssal basins of the Bering Sea have been created or altered by crustal extension and back‐arc spreading. These processes have occurred during and since early Eocene time when the Aleutian Ridge developed and isolated oceanic...
Geographic Variation in Hirundo pyrrhonota (Cliff Swallow) from Northern North America
M. Ralph Browning
1992, Western Birds (23) 21-29
The number of subspecies recognized in Hirundo pyrrhonota Vieillot (Cliff Swallow) from Alaska, Canada, and the northern contiguous United States ranges from one (Peters 1960) to three (e.g., Jewett et al. 1953, Oberholser, 1920, breeding from central Alaska to the central Great Basin, and two disjunct populations of nominate pyrrhonota,...
Earthquakes, September - October 1992
W. J. Person
1992, Earthquakes & Volcanoes (USGS) (23) 280-287
This reporting period was very active in terms of earthquake occurrence; there were six major earthquakes (7.0≤M<8.0) during the second half of october. Earthquake-related deaths were reported in Iran, Nicaragua, Egypt, Colombia, Morocco, Zaire, and the Republic of Georgia. In the United States, a damaging earthquake occurred in Utah on Septmber...
Sedimentary history of the Tethyan margins of eastern Gondwana during the Mesozoic
James G. Ogg, Felix Gradstein, Julie A. Dumoulin, Massimo Sarti, Paul Brown
1992, Book chapter, Geophysical Monograph Series, Volume 70: Synthesis of results from scientific drilling in the Indian Ocean
A composite Mesozoic geological history for the Gondwana margins to the Eastern Tethys Ocean can be assembled from stratigraphic successions on the Australian and Himalayan margins and from drill sites of Ocean Drilling Program Legs 122 and 123. During the Triassic, this region drifted northwards, entering tropical paleolatitudes during the...
Earthquakes, May-June 1991
W. J. Person
1992, Earthquakes & Volcanoes (USGS) (23) 77-81
One major earthquake occurred during this reporting period. This was a magntidue 7.1 in Indonesia (Minahassa Peninsula) on June 20. Earthquake-related deaths were reported in the Western Caucasus (Georgia, USSR) on May 3 and June 15. One earthquake-related death was also reported El Salvador on June 21. In the United States,...
Structural evolution of an arc-basin: The Gravina Belt in central southeastern Alaska
Peter J. Haeussler
1992, Tectonics (11) 1245-1265
The upper Middle Jurassic-Lower Cretaceous Gravina belt lies along the eastern margin of the Alexander terrane in southeastern Alaska. This group of turbidites and mafic to intermediate volcanic rocks was deformed during mid to Late Cretaceous time during the closing of a basin of unknown size between the Alexander terrane...
Land cover mapping of the Upper Kuskokwim Resource Management Area, Alaska, using Landsat and a digital data base approach
Carl Markon
1992, Canadian Journal of Remote Sensing (18) 62-71
Digital land cover and terrain data for the Upper Kuskokwim Resource Management Area in south-central Alaska were produced by the U.S. Geological Survey for the U.S. Bureau of Land Management. These and other environmental data were incorporated into a digital data base to assist in the production of a land...
Threshold foraging behavior of baleen whales
John F. Piatt, David A. Methven
1992, Marine Ecology Progress Series (84) 210
We conducted hydroacoustic surveys for capelin Mallotus villosus in Witless Bay, Newfoundland, Canada, on 61 days during the summers of 1983 to 1985. On 32 of those days in whlch capelin surveys were conducted, we observed a total of 129 baleen whales - Including 93 humpback Megaptera novaeangliae, 31 minke...
Antipredator strategies in breeding Bristle-thighed Curlews
Brian J. McCaffery, Robert E. Gill Jr.
1992, American Birds (46) 378-383
Each fall the world’s breeding population of Bristle-thighed Curlews (Numenius tahitiensis) arrives on the central Pacific wintering grounds following a migration that entails a non- stop flight of over 5000 kilometers. Sun-drenched, palm-shrouded atolls will be their home for the ensuing eight months. Even in the avian world, however, such...
Mineral resource assessment of the Annette Islands Reserve, Southeast Alaska
R. J. Horton, Susan M. Karl, Andrew Griscom, C. D. Taylor, K. R. Bond, R. Michael Senterfit
1992, Report, 1992 mineral frontiers on Indian lands
No abstract available ...
Paleomagnetism of the Late Triassic Hound Island Volcanics: Revisited
Peter J. Haeussler, Robert S. Coe, T.C. Onstott
1992, Journal of Geophysical Research B: Solid Earth (97) 19617-19639
The collision and accretion of the Alexander terrane profoundly influenced the geologic history of Alaska and western Canada; however, the terrane's displacement history is only poorly constrained by sparse paleomagnetic studies. We studied the paleomagnetism of the Hound Island Volcanics in order to evaluate the location of the Alexander terrane...
Changes in Alaskan soft-bottom prey communities along a gradient in sea otter predation
R.G. Kvitek, J.S. Oliver, A.R. DeGange, B.S. Anderson
1992, Ecology (73) 413-428
Sea Otter (Enhydra lutris), well documented as "keystone" predators in rocky marine communities, were found to exert a strong influence on infaunal prey communities in soft-sediment habitats. Direct and indirect effects of sea otter predation on subtidal soft-bottom prey communities were evaluated along a temporal gradient of sea otter occupancy...
Intraspecific variation in egg shape among individual emperor geese
Margaret R. Petersen
1992, Journal of Field Ornithology (63) 344-354
Within-clutch variability in shape of 1743 eggs from 301 nests of Emperor Geese (Chen canagicus) laid over a 5-yr period was measured. Individual females laid similar shaped eggs in successive years, and eggs among clutches within females could not be distinguished. Cluster analysis correctly identified 69.9% of 136 known conspecific...
Breeding chronology of mottled ducks in a Texas coastal marsh
J. Barry Grand
1992, Journal of Field Ornithology (63) 195-202
The relationship between breeding chronology of Mottled Ducks (Anas fulvigula fulvigula) and wetland conditions at San Bernard National Wildlife Refuge was examined over a 3-yr period. Median nest initiation dates varied by as much as 68 d among years. Initiation occurred earlier in 1985 and 1987 versus 1986 (P <...
Lower Cretaceous smarl turbidites of the Argo Abyssal Plain, Indian Ocean
Julie A. Dumoulin
Sondra K. Stewart, Diana Kennett, Elsa K. Mazzullo, editor(s)
1992, Proceedings of the Ocean Drilling Program: Scientific Results 123-5
Sediments recovered during Ocean Drilling Program (ODP) Leg 123 from the Argo Abyssal Plain (AAP) consist largely of turbidites derived from the adjacent Australian continental margin. The oldest abundant turbidites are Valanginian-Aptian in age and have a mixed (smarl) composition; they contain subequal amounts of calcareous and siliceous biogenic components,...
Time allocation by Greater White-fronted Geese: Influence of diet, energy reserves and predation
Craig R. Ely
1992, The Condor (94) 857-870
I determined the amount of time Greater White-fronted Geese (Anser albifrons frontalis) allocated to various activities from September to May, 1980-1982 at their primary wintering areas in the Pacific Flyway of North America. The length of time spent on roosts during the day was positively correlated to day length. Geese...
Reproductive ecology of Emperor Geese: Survival of adult females
Margaret R. Petersen
1992, The Condor (94) 398-406
Life history theory predicts a decrease in survival with increased reproductive effort of individuals. This relationship, however, is highly variable among and within species. I studied the nesting success and survival of adult female Emperor Geese during 1982-1986 and found no direct evidence that differential reproductive effort as measured by...
Density of loons in central Alaska
Richard B. Lanctot, Pham Xuan Quang
1992, The Condor (94) 282-286
Loons breed across North America from the high arctic south to about 43 north latitude. (AOU 1983). Populations, particularly of Common Loons (Gavia immer) have recently declined in the continental U.S. and southern Canada (Sutcliff 1979, Titus and VanDruff 1981, McIntyre 1988). As a result, state and private natural resource...
