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Page 279, results 6951 - 6975

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Toward a Federal Land Information System: Experiences and issues
James A. Sturdevant
1988, Bulletin 1852
From 1983 to 1987, the U.S. Geological Survey conducted research to develop a national resource data base of Federal lands under the auspices of the Federal Land Information System (FLIS) program. The program's goal was to develop the capability to provide information to national mineral-use policymakers. Prototype spatial data bases...
The Fox permafrost tunnel: A late Quaternary geologic record in central Alaska
T. D. Hamilton, J. Craig, P.V. Spellmann
1988, GSA Bulletin (100) 948-969
The Fox permafrost tunnel, which penetrates 110 m into frozen sediments of Gold-stream valley, provides a continuous exposure of fossiliferous silt and alluvium above schistose bedrock. Deposition of fluvial gravel was followed by a long interval of loess accretion and permafrost aggradation that was punctuated by episodes of thaw and...
Western state instream flow programs: a comparative assessment
Matthew J. McKinney, Jonathan G. Taylor
1988, Report, Instream Flow Information Paper
During their early history, Western States water rights laws were primarily means for facilitating and regulating water diversions for offstream, consumptive use. More recently, a countervailing concern for instream values such as fish and wildlife habitat, recreation, aesthetic values, and water quality has emerged in the legislative and administrative handling...
Ice gouge processes in the Alaskan Beaufort Sea
Douglas M. Rearic, Edward J. Ticken
1988, Technical Council on Cold Regions Engineering Monograph 85-107
A generalized picture of ice gouge characteristics from shallow inshore depths to the outer shelf at about 60 m of water is presented. Data from recent studies show that the size and quantity of gouging increases in an offshore direction to depths of about 45 m where this trend then...
Ocean plateau-seamount origin of basaltic rocks, Angayucham terrane, central Alaska
F. Barker, D. L. Jones, J. R. Budahn, P.J. Coney
1988, Journal of Geology (96) 368-374
The Angayucham terrane of north-central Alaska (immediately S of the Brooks Range) is a large (ca. 500 km E-W), allochthonous complex of Devonian to Lower Jurassic pillow basalt, diabase sills, gabbro plutons, and chert. The mafic rocks are transitional normal-to-enriched, mid-ocean-ridge (MORB) type tholeiites (TiO2 1.2-3.4%, Nb 7-23 ppm, Ta...
Coastal geomorphology of arctic Alaska
Peter W. Barnes, Stuart E. Rawlinson, Erk Reimnitz
1988, Technical Council on Cold Regions Engineering Monograph 3-30
The treeless, tundra-plain of northern Alaska merges with the Arctic Ocean along a coastal area characterized by low tundra bluffs, and sparse coastal and delta dunes. Coastal engineering projects that aggrade or degrade permafrost will alter the geomorphology and rates of coastal processes by changing coastal stability. Similarly, projects that...
Absence of strain accumulation in the Shumagin seismic gap, Alaska, 1980-1987
M. Lisowski, J.C. Savage, W.H. Prescott, W.K. Gross
1988, Journal of Geophysical Research Solid Earth (93) 7909-7922
Measurements of the deformation of a trilateration network in the Shumagin seismic gap in the interval 1980–1987 failed to detect any significant strain accumulation (observed extension rate in the direction of plate convergence 0.00±0.03 μstrain/yr). Dislocation models of the subduction process and measurements at a comparable network at a known...
Causes of varied sediment gravity flow types on the Alsek Prodelta, northeast Gulf of Alaska
William C. Schwab, Homa J. Lee, Bruce F. Molnia
1988, Marine Geotechnology (7) 317-342
Slope failures and subsequent mass movements have been identified in Holocene glaciomarine sediment on declivities less than 1.3° on the Alsek prodelta, Gulf of Alaska. Isolated collapse features cover less than 10 percent of a nearshore sand deposit, in water depths less than 40 m. In contrast, sediment gravity flow...
Causes of two slope-failure types in continental-shelf sediment, northeastern Gulf of Alaska
William C. Schwab, Homa J. Lee
1988, Journal of Sedimentary Research (58) 1-11
Slumps and sediment-gravity flows have been identified in Holocene glaciomarine sediment on declivities less than 1.3 degrees on the Gulf of Alaska continental shelf. Geologic and geotechnical investigation suggest that the processes responsible for these slope failures are earthquake and storm-wave loading, coupled with cyclic degradation of the sediment-shear strength....
Fall migration of Ross' Gull (Rhodostethia rosea) in Alaskan Chukchi and Beaufort seas: Final report
George J. Divoky, Gerald A. Sanger, Scott A. Hatch, J. Christopher Haney
1988, Report
Ross’ Gulls (Rhodostethia rosea) are a major component of the pelagic avifauna of the Alaskan Chukchi and Beaufort seas in fall. Until recently, however, their distribution, abundance, and phenology of occurrence in Alaskan waters was poorly known. Since 1970, a combination of shipboard, aerial, and land-based surveys has revealed the...
Littoral foraging by red phalaropes during spring in the northern Bering Sea
J. Christopher Haney, Amy E. Stone
1988, The Condor (90) 723-726
Phalaropes demonstrate considerable plasticity in their choice of foraging habitats. The Red Phalarope (Phalaropus fulicaria) alternates use of pelagic environments in winter and migration (Taning 1933, Stanford 1953, Briggs et al 1984) with wet tundra habitats during the breeding season (Kistchinski 1975, Mayfield 1979, Ridley 1980). Foods available and taken...
Seasonal occurrence of migrant whimbrels and bristle-thighed curlews on the Yukon-Kuskokwim Delta, Alaska
Colleen M. Handel, Christian P. Dau
1988, The Condor (90) 782-790
Migrant Whimbrels (Numenius phaeopus) and Bristle-thighed Curlews (N. tahitiensis) were recorded during five summers along coastal tundra of the Yukon-Kuskokwim Delta, Alaska. From June to September, 1975-1979, 358 flocks totalling 1,265 curlews were observed; an additional 54 flocks were identified by vocalization alone. Among the 359 flocks identified to species,...
Survival of aluminum and monel bands on black brant
Calvin J. Lensink
1988, North American Bird Bander (13) 33-35
Three recoveries of Black Brant (Branta bernicla nigricans) were recently reported in the "Significant Encounters" section of North American Bird Bander (Anon. 1986). At the time of recovery these Brant were 21.5, 22 and at least 22.5 years old. The significance of these recoveries caught my attention as all were...