Spectacular mobility of ash flows around Aniakchak and Fisher calderas, Alaska
T. P. Miller, R.L. Smith
1977, Geology (5) 173-176
Ash flows around Aniakchak and Fisher calderas in the Aleutian volcanic arc show evidence of having flowed over formidable topographic barriers at distances of tens of kilometres from their source. Ash flows swept down glaciated valleys on the south side of Aniakchak caldera, crossed a broad lowland with an altitude...
Submarine seepage of natural gas in Norton Sound, Alaska
J.D. Cline, M.L. Holmes
1977, Science (198) 1149-1153
Unusual concentrations of dissolved two- to four-carbon alkanes were observed in the waters in Norton Sound in a localized area approximately 40 kilometers south of Nome, Alaska, in 1976. The hydrocarbons were identified in the near-bottom waters downcurrent for more than 100 kilometers from a sea-floor point source. Preliminary dynamic...
Tertiary and Quaternary deposits at The Palisades, central Alaska
Warren E. Yeend
1977, Journal of Research of the U.S. Geological Survey (5) 747-752
The Palisades of the Yukon River, located near the geographic center of Alaska, has long been an attraction to people traveling along the river. Numerous scientific field parties have viewed or visited the locality and published short accounts of their observations. The river bluffs are as much as 90 meters...
Benthic invertebrates in an arctic mountain stream, Brooks Range, Alaska
K. V. Slack, J. W. Nauman, L. J. Tilley
1977, Journal of Research of the U.S. Geological Survey (5) 519-527
A 1-day, late-summer reconnaissance of the Dietrich River, Alaska, determined species composition and diversity of benthic invertebrates and examined the correlation between stream order and invertebrate distribution. Benthic invertebrates were collected by dip net, drift net, and 10-rock collections, and results were combined for each station. Forty-nine taxa were identified...
Spherulitic rhyolite dike from Goat Island, southeastern Alaska
Walter R. Vennum, G. Donald Eberlein
1977, Journal of Research of the U.S. Geological Survey (5) 445-451
Spherulites, as much as 4 mm in diameter, locally constitute almost 50 percent by volume of a dark-red rhyolite dike that intrudes porphyritic pyroxene gabbro along the northeast coast of Goat Island, 3.2 km northwest of Hydaburg, southeastern Alaska. The largest spherulites are composed mainly of o-quartz, whereas the smallest...
A reconnaissance investigation of a large meromictic lake in southeastern Alaska
George A. McCoy
1977, Journal of Research of the U.S. Geological Survey (5) 319-324
Redoubt Lake is one of the largest documented meromictic lakes in North America. The chemocline extends in depth from 80 to 100 m (meters) and the steepest gradient is between 98 and 100 m. The monimolimnion is anoxic, contains hydrogen sulflde, and has a salinity about two-thirds that of seawater....
Metamorphic rocks of the Yakutat-St. Elias area, south-central Alaska
Travis Hudson, George Plafker, Donald L. Turner
1977, Journal of Research of the U.S. Geological Survey (5) 173-184
Metamorphic rocks in the Yakutat-St. Elias area range in grade from zeolite to amphibolite facies. Radiometric age determinations on selected metamorphic rocks have helped to identify two major metamorphic events, one in Late Cretaceous time that was characterized by penetrative deformation, and one in the Miocene Epoch that resulted in...
Intrusive rocks of the Yakutat-St. Elias area, south-central Alaska
Travis Hudson, George Plafker, Marvin A. Lanphere
1977, Journal of Research of the U.S. Geological Survey (5) 155-172
Twenty-three plutons, exposed over a total area of nearly 1200 km2, have been studied in the Alaska part of the St. Elias Mountains between long 138° and 141°W. Results of potassium-argon age determinations combined with field relations, petrography, and major- and trace-element chemistry suggest six major intrusive events: (1) late...
Sheeted dikes, gabbro, and pillow basalt in flysch of coastal southern Alaska
Russell G. Tysdal, J. E. Case, G. R. Winkler, S. H. B. Clark
1977, Geology (5) 377-383
A Paleocene to Eocene(?) mafic sequence of igneous rocks on Knight Island and a Cretaceous mafic and ultramafic sequence of the Resurrection Peninsula in coastal southern Alaska are characterized by pillow basalts, sheeted dikes, and gabbro intrusions. At both localities, pillow basalts are interbedded with flysch, and the gabbros intrude...
Table describing metalliferous mineral deposits in the western part of southern Alaska
Edward M. MacKevett
1977, Open-File Report 77-169-F
No abstract available....
Effects of the February 3, 1965, earthquake on Amchitka Island, Alaska
Leonard Meade Gard
1977, Report, Memorandum of Understanding
No abstract available....
Coastal processes and morphology of the Bering Sea coast of Alaska
A. H. Sallenger Jr., R. Hunter, J.R. Dingler
1977, Book chapter, Environmental assessment of the Alaskan continental shelf; Hazards; data management
Landslides
T. H. Nilsen
1977, Earthquake Information Bulletin (USGS) (9) 27-33
Landslides are frequent in areas where there is high seismicity and steep slopes. Landslides associated with earthquakes may cause as much damage as the initial ground shaking. They may also occur long after the earthquake. Some of the major earthquakes that have occurred during the past 15 years demonstrate the hazards...
Earthquakes: August-September 1976
W. J. Person
1977, Earthquake Information Bulletin (USGS) (9) 32-33
Destructive earthquakes continued to strike in many parts of the world during this period. The sparsely populated area of the New Hebrides Islands in the southwest Pacific was struck by a major earthquake (one with a magnitude between 7.0 and 7.9). A great earthquake (magnitude 8.0 or above) struck just...
Breeding avifauna of the south San Francisco Bay estuary
Robert E. Gill Jr.
1977, Western Birds (8) 1-12
San Francisco Bay represents one of the largest estuarine areas on the Pacific Coast of North America. Its open waters, tidal flats, tidal marshes and solar evaporation ponds provide critical foraging, resting and breeding habitat for migratory and resident birds. The avifauna of San Francisco Bay has received considerable attention;...
Demographic features of a lapland longspur population near Barrow, Alaska
Thomas W. Custer, Frank A. Pitelka
1977, The Auk (94) 505-525
Breeding density, clutch size, hatching and fledging success, and survival of adult Lapland Longspurs (Calcarius lapponicus) were monitored over a 7-year period near the Naval Arctic Research Laboratory, Barrow, Alaska. Nesting begins as soon as the tundra starts to clear of snow and appears to be timed so that the...
Mineral resources of the Tracy Arm-Fords Terror Wilderness Study Area and vicinity, Alaska
David A. Brew, Donald Grybeck, Bruce R. Johnson, Robert C. Jachens, C.J. Nutt, D.F. Barnes, A.L. Kimball, J.C. Still, J.L. Rataj
1977, Open-File Report 77-649
The Wilderness Study Area consists of about 322,300 hectares (1,250 square miles or 796,400 acres) on the southwest side of the Coast Range in southeastern Alaska about 72 km (45 miles) southeast of Juneau, Alaska (fig. 1). An additional 142,800 hectares (550 square miles or 352,900 acres) lying in part...
Gravity measurements on summer sea ice in the Beaufort and Chukchi seas, 1976
Gary Boucher
1977, Open-File Report 77-705
During September, 1976, a series of gravity measurements was made in the western Beaufort Sea and the northern Chukchi Sea on ice floes and on a grounded ice island. The data were taken to evaluate the technique of measuring gravity on small ice floes in summer and to supplement and...
Unusual foraging by a fork-tailed storm-petrel
Robert E. Gill Jr.
1977, The Auk (94) 385-386
While conducting an offshore bird census from the sea beach at Nelson Lagoon, Alaska Peninsula (56°00'N, 161°10'W) at 1700 on 17 September 1976 1 saw a Fork-tailed Storm Petrel (Oceanodroma f. furcata) feeding on the beached remains of an adult gray whale (Eschrichtius robustus) that had been trapped by ice...
Scientists eye steaming Mount Wrangell, Alaska
James Caldwell, Anna M. Orellana, editor(s)
1976, Earthquake Information Bulletin (USGS) (8) 24-25
[None]...
Geophysical prospecting for ground water in Alaska
Hans D. Ackermann
Marvin A. Pistrang, Henry Spall, editor(s)
1976, Earthquake Information Bulletin (USGS) (8) 18-20
[none]...
Glaciomarine deposits of Miocene through Holocene age in the Yakataga Formation along the Gulf of Alaska margin, Alaska
George Plafker, W.O. Addicott
Thomas P. Miller, editor(s)
1976, Conference Paper, Recent and ancient sedimentary environments in Alaska: Proceedings of the Alaska Geological Society Symposium held April 2-4, 1975, at Anchorage, Alaska
Perhaps the world's longest and most complete onshore sedimentary record of late Cenozoic glaciation is preserved in the Gulf of Alaska Tertiary province that extends 800 km along the coast of southern Alaska. The Yakataga Formation, with an aggregate outcrop thickness of about 5,000 m, is characterized by variable amounts...
Tectonic framework of petroliferous rocks in Alaska: hydrocarbons
Arthur Grantz, C.E. Kirschner
1976, Book chapter, Circum-Pacific energy and mineral resources (AAPG Memoir 25)
Alaska, which contains about 28% of the land and continental shelf of the United States, is estimated by the U.S. Geological Survey to contain about one third of the nation's undiscovered oil and about one sixth of its undiscovered natural gas. The Survey estimates that fields discovered in Alaska through...
Age and tectonic significance of volcanic rocks on St. Matthew Island, Bering Sea, Alaska
William W. Patton Jr., Marvin A. Lanphere, Thomas P. Miller, Richard A. Scott
1976, Journal of Research of the U.S. Geological Survey (4) 67-73
Reconnaissance investigations of the heretofore little known volcanic assemblage on St Matthew Island provide significant information on the tectonic history of the Bering Sea shelf. St. Matthew Island is made up of approximately 500 m of subaerial calc-alkaline volcanic rocks ranging in composition from high-alumina basalt to rhyolite. Four K-Ar...
Middle Jurassic (Bajocian and Bathonian) ammonites from northern Alaska
Ralph Willard Imlay
1976, Professional Paper 854
