Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska
H. McLean, J.R. Hein
1984, Canadian Journal of Earth Sciences (21) 171-180
The rocks of southwestern Umnak Island (Nikolski area) consist mainly of a slightly deformed marine sedimentary sequence intruded by hypabyssal quartz diorite sills and small plutons. Laminated and thin-bedded argillaceous and tuffaceous mudstone and siltstone reflect volcanic arc sedimentation from late Eocene to early Oligocene time. Zeolite facies minerals formed...
Geomorphic domains and linear features on Landsat images, Circle quadrangle, Alaska
S. L. Simpson
1984, Open-File Report 83-170-E
A remote sensing study using Landsat images was undertaken as part of the Alaska Mineral Resource Assessment Program (AMRAP). Geomorphic domains A and B, identified on enhanced Landsat images, divide Circle quadrangle south of Tintina fault zone into two regional areas having major differences in surface characteristics. Domain A is...
Dietary changes and poor reproductive performance in Glaucous-winged Gulls
Edward C. Murphy, Robert H. Day, Karen L. Oakley, A. Anne Hoover
1984, The Auk (101) 532-541
The breeding phenology of Glaucous-winged Gulls (Larus glaucescens) on Squab Island, Aialik Bay, Alaska in 1979 was identical to that in 1980, but clutch sizes and later reproductive performance differed markedly. In 1979, clutch sizes were small, but chick growth rates and survivorship were high. In contrast, clutch sizes were...
Social organization of sea otters in Prince William Sound, Alaska
David L. Garshelis, Ancel M. Johnson, Judith A. Garshelis
1984, Canadian Journal of Zoology (62) 2648-2658
Sea otters in Prince William Sound. Alaska, were spatially segregated into predominantly (97%) male areas at the front of the expanding population and breeding areas with fewer (up to 33%) males. From 1975 to 1984 we captured and marked 267 otters with tags and (or) radio transmitters and investigated their...
Preliminary results, Central Gneiss Complex of the Coast Range batholith, southeastern Alaska: the roots of a high-K, calc-alkaline arc?
F. Barker, Joseph G. Arth
1984, Physics of the Earth and Planetary Interiors (35) 191-198
The Central Gneiss Complex (CGC) of the Coast Range batholith is the oldest unit of the batholith east of Ketchikan, Alaska, being dated by the zircon UPb method (by T.W. Stern) at 128-140 Ma. Heterogeneous, layered, commonly migmatitic, orthogneiss of hornblende-biotite quartz diorite, tonalite, quartz monzodiorite and granodiorite compositions (IUGS...
New data for iimoriite.
E.E. Foord, M.H. Staatz, N. M. Conklin
1984, American Mineralogist (69) 196-199
In its first reported occurrence outside of Japan, iimoriite, Y2(SiO4)(CO3), has been found in a thorite- and uraninite-bearing quartz and albite vein from Bokan Mountain on Prince of Wales Island, Alaska. It occurs as buff-tan subhedral and anhedral grains, 0.01-0.5 mm in diameter, with vitreous lustre, white streak, and H....
Regional variations in the fluvial Upper Devonian and Lower Mississippian(?) Kanayut Conglomerate, Brooks Range, Alaska
Thomas E. Moore, T. H. Nilsen
1984, Sedimentary Geology (38) 465-497
The wholly allochthonous Upper Devonian and Lower Mississippian(?) Kanayut Conglomerate is one of the most extensive fluvial deposits in North America. It crops out for 950 km along the crest of the Brooks Range in a series of thrust plates and is as thick as 2615 m. The Kanayut forms...
Mass movement of fine-grained sediment to the basin floor, bering sea, Alaska
P.R. Carlson, Herman A. Karl
1984, Geo-Marine Letters (4) 221-225
Large volumes of fine-grained sediment have been transported to the deepbasin floor in the Bering Sea, especially during glacial low stands of sea level. Turbidity currents and several types of mass movement have been the chief transporting agents. ?? 1985 Springer-Verlag New York Inc....
Magmatic epidote and its petrologic significance
E-An Zen, J. M. Hammarstrom
1984, Geology (12) 515-518
Epidote is a major magmatic mineral in tonalite and granodiorite in a belt coextensive with the Mesozoic accreted terranes between northern California and southeastern Alaska. Textural and chemical evidence indicates that epidote crystallized as a relatively late but magmatic mineral that formed through...
Mineral resources of the Tracy Arm-Fords Terror Wilderness Study Area and vicinity, Alaska
Water Resources Division, U.S. Geological Survey
1984, Bulletin 1525
No abstract available....
Breeding biology of Pacific white-fronted geese
Craig R. Ely, Dennis G. Raveling
1984, Journal of Wildlife Management (48) 823-837
Nesting ecology of Pacific white-fronted geese (Anser albifrons frontalis) was studied on a 9.9-km2 area on the Yukon-Kuskokwim (Y-K) Delta, Alaska, during 1977-79. Availability of nesting habitat varied considerably among years because of differences in time of snow- and icemelt. Mean clutch size was 3.7 eggs in the late spring...
Bedding types in Holocene tidal channel sequences, Knik Arm, Upper Cook Inlet, Alaska
S. Bartsch-Winkler, H. R. Schmoll
1984, Journal of Sedimentary Petrology (54) 1239-1250
Uplifted convoluted and horizontal to subhorizontal beds of varying thickness in intertidal silt as old as 3,280 + or - 90 yr B.P. are exposed in the banks of tidal channels of unknown depth in the intertidal zone in Knik Arm of Upper...
Gold in natural water: A method of determination by solvent extraction and electrothermal atomization
J. B. McHugh
1984, Journal of Geochemical Exploration (20) 303-310
A method has been developed using electrothermal atomization to effectively determine the amount of gold in natural water within the nanogram range. The method has four basic steps: (1) evaporating a 1-L sample; (2) putting it in hydrobromic acid-bromine solution; (3) extracting the sample with methyl-isobutyl-ketone; and (4) determining the...
Earthquakes, July-August 1983
W. J. Person
1984, Earthquake Information Bulletin (USGS) (16) 34-39
There were three major earthquakes (7.0-7.9) during this reporting period, but all were in sparsely populated areas. The first occurred on July 11 in the South Shetland Islands, the second in the Aegean Sea on August 6, and the third on August 17 in Kamchatka. Earthquake-related deaths from other quakes...
Nestling diet and feeding rates of rhinoceros auklets in Alaska
Scott A. Hatch
David N. Nettleship, Gerald A. Sanger, Paul F. Springer, editor(s)
1984, Conference Paper, Marine birds: Their feeding ecology and commercial fisheries relationships
Food brought to nestling Rhinoceros Auklets (Cerorhinca monocerata) was sampled by applying tape or cloth muzzles to the chicks and collecting the uningested food from the burrow daily. Limited data were also gathered for Tufted and Horned puffins (Fratercula cirrhata and F. corniculata). Auklet chicks received an average of 34.1...
Offset of Tertiary arcs on the Alaska Peninsula: A section in Geological Survey research, fiscal year 1981
U.S. Geological Survey
1984, Professional Paper 1375
Geologic mapping and potassium-argon dating by R. L. Detterman, F. H. Wilson, J. E. Case, and Nora Shew in the Ugashik and western part of the Karluk quadrangles have shown that the Eocene and Oligocene volcanic arc continues into these quadrangles from the south in the Chignik and Sutwik Island...
Guide to the Bedrock Geology of a traverse of the Chugach Mountains from Anchorage to Cape Resurrection
Gary R. Winkler, Marti L. Miller, R.B. Hoekzema, Julie A. Dumoulin
1984, Book
No abstract available....
The Jeanie Point complex revisited
Julie A. Dumoulin, Marti L. Miller
1984, Circular 868
The so-called Jeanie Point complex is a distinctive package of rocks within the Orca Group, a Tertiary turbidite sequence. The rocks crop out on the southeast coast of Montague Island, Prince William Sound, approximately 3 km northeast of Jeanie Point (loc. 7, fig. 44). These rocks consist dominantly of fine-grained...
U. S. GEOLOGICAL SURVEY ALASKAN GOLD PROJECT.
John C. Antweiler, John Cathrall, Richard Tripp
1984, Conference Paper, University of Alaska, Mineral Industry Research Laboratory, MIRL Report
The United States Geological Survey has begun a state-wide study of Alaskan gold deposits. The immediate goals are to determine the relationship of gold in placer deposits to possible primary sources, to determine how nuggets form, to contribute to existing knowledge of principles for prospecting for placer deposits, and determine...
BOWIEITE: A NEW RHODIUM-IRIDIUM-PLATINUM SULFIDE IN PLATINUM-ALLOY NUGGETS, GOODNEWS BAY, ALASKA.
George A. Desborough, Alan J. Criddle
1984, Canadian Mineralogist (22) 543-552
Bowieite (Rh,Ir,Pt)//2S//3, a new mineral species, is found in three nuggets of platinum from Goodnews Bay, Alaska. In linearly polarized reflected light, and compared to the host, higher reflecting white platinum-iridium alloy, bowieite is pale gray to pale gray-brown; neither bireflectance nor reflectance pleochroism is apparent. With polars crossed, its...
VERTICAL MOVEMENT OF GROUND WATER UNDER A LANDFILL, ANCHORAGE, ALASKA.
Gordon L. Nelson
1984, Conference Paper
A thorough review of existing ground-water information may, in some cases, be adequate to estimate rates of migration of pollutants. Analysis of data from well-performance tests and from hydrologic-data stations near a landfill in Anchorage, Alaska, indicates that pollutants migrating downward toward a confined aquifer that supplies water to three...
Composition and energy contents of mature inshore spawning capelin (Mallotus villosus): Implications for seabird predators
W.A. Montevecchi, John F. Piatt
1984, Comparative Biochemistry and Physiology, Part A: Molecular & Integrative Physiology (78) 15-20
1. Lipid levels of capelin are highest in late fall and lowest during the summer spawning season; protein levels are constant at 13–14% body wt throughout the year.2. Ovid females contained significantly more lipid and protein and less water and had higher energy densities than males and spent...
Alaska seismic studies
J. Rogers
1984, Earthquake Information Bulletin (USGS) (16) 28-33
Seismic monitoring in Alaska by the U.S Geological Survey consists of a network of 46 stations focused on the following four areas: Yakatut Bay to Prince William Sound, centered on the Yakatage seismic gap. Anchorage, and the surrounding region of rapid growth and development. The active Cook Inlet volcanoes-Iliamna,Redoubt and Spurr. (Two of...
Macrotidal subarctic environment of Turnagain and Knik Arms, Upper Cook Inlet, Alaska: sedimentology of the intertidal zone
S. Bartsch-Winkler, A.T. Ovenshine
1984, Journal of Sedimentary Petrology (54) 1221-1238
An extensive sheet of silty sand crossed by tidal channels is exposed at low tide in Turnagain and Knik Arms, Alaska. Transportation and deposition of sediment composing this sheet is the result of strong tidal currents due to the maximum spring tidal range...
Notes on sedimentation activities calendar year 1983
U.S. Interagency Advisory Committee on Water Data- Subcommittee on Sedimentation
1984, Report
This report is a digest of information furnished by those Federal agencies conducting sedimentation investigations. It includes descriptions of work in progress or planned, important findings, new methods, new publications, laboratory and other research activities, and other pertinent information. The material has been organized by major drainage regions in the...
