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Page 395, results 9851 - 9875

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Distribution of oxygen and carbon isotopes in fossils of late cretaceous age, western interior region of North America
H. A. Tourtelot, R.O. Rye
1969, Geological Society of America Bulletin (80) 1903-1922
The oxygen isotope composition of both calcite and aragonite of the pelecypod Inoceramus is lighter than the composition of the aragonite of associated baculites and other cephalopods from the western interior region, the Gulf and Atlantic Coastal Plains, parts of Canada, and West Greenland. This difference cannot be explained by...
Progress on a gravity map of Alaska
David F. Barnes
1969, Eos Science News (50) 550-552
The U.S. Geological Survey began gravity surveys in Alaska ten years ago with local surveys in the Copper River and Tanana Basins. Shortly before the 1963 AGU gravity symposium [Barnes, 1965], the emphasis shifted from local surveys to the preparation of a reconnaissance gravity map of the whole state with...
The structure and tectonic history of the eastern Aleutian Trench
Roland E. von Huene, George G. Shor Jr.
1969, Geological Society of America Bulletin (80) 1889-1902
The tectonic character of the eastern Aleutian Trench and some major events in its geologic history can be estimated from nine continuous seismic reflection records. A section of pre-trench, deep oceanic sediments rests on the down-warped crust that forms the trench. Nearly horizontal undeformed strata that unconformably overlie this deep...
Standardization of gravimeter calibrations in the geological survey
David F. Barnes, Howard W. Oliver, Stephen L. Robbins
1969, Eos Science News (50) 526-527
The calibration of gravimeters has long been primarily the concern of geodesists involved in measuring large gravity differences, but recent developments suggest that the precision and stability of gravimeter calibrations may have greater geologic importance in the future. First, the use of high-speed computers and an increasing variety of supplemental...
Cretaceous, Tertiary, and early Pleistocene rocks from the continental margin in the Bering Sea
David M. Hopkins, David W. Scholl, Warren O. Addicott, Richard L. Pierce, Patsy Beckstead Smith, Jack A. Wolfe, David Gershanovich, Boris Kotenev, Kenneth E. Lohman, Jere H. Lipps, John D. Obradovich
1969, Geological Society of America Bulletin (80) 1471-1480
Rocks dredged from the continental margin in eastern Bering Sea in and near the Pribilof Canyon indicate that the acoustic basement represents the upper surface of thoroughly lithified turbidite beds of graywacke and siltstone of Late Cretaceous age. The stratified sequence covering the acoustic basement is gently deformed and includes...
Age and chemistry of mesozoic and tertiary plutonic rocks in south-central Alaska
Bruce L. Reed, Marvin A. Lanphere
1969, GSA Bulletin (80) 23-44
On the basis of potassium-argon mineral ages, plutonic rocks in an area of approximately 22,000 square miles in the southern Alaska Range and the Aleutian Range can be assigned to age groups that show differences in chemical characteristics and geographic distribution. The plutonic groups are Early and Middle Jurassic, Late...
Heat flow in the Arctic
Arthur H. Lachenbruch, B. Vaughan Marshall
1969, Arctic (22) 300-311
Defines heat flow as the flux at the earth's solid surface of heat conducted from the interior; the heat-flow-unit (hfu) is on the order of 1-millionth calorie through each sq cm of the surface/sec, which is enough to melt a 4-mm layer of ice over the earth's surface/yr. Earth heat...
Stenothecoida, a proposed new class of Cambrian Mollusca
Ellis L. Yochelson
1969, Lethaia (2) 49-62
Cambridium, Bagenovia, and Stenothecoides, composing the Family Cambridiidae, a monotypic superfamily and an order, were in 1960 assigned (although with a query) to the molluscan class Monoplacophora. The basic error of this assignment, according to the author, was the assumption that these specimens are univalves. One specimen from Siberia and a...
Safety and survival in an earthquake
Water Resources Division, U.S. Geological Survey
1969, Report
Many earth scientists in this country and abroad are focusing their studies on the search for means of predicting impending earthquakes, but, as yet, an accurate prediction of the time and place of such an event cannot be made. From past experience, however, one can assume that earthquakes will continue...
Geochemical maps of an area northwest of the Chulitna River, central Alaska Range
C. C. Hawley, Allen L. Clark
1969, Open-File Report 69-123
An area northwest of the Chulitna River in west-central Alaska Range locally shows local anomalous concentrations of gold, silver, arsenic, copper, zinc, and lead in stream-sediment samples. Most stream sediments showing anomalous concentrations of metals can be correlated with either known or newly discovered deposits or occurrences described in Circular...
Environmental impact of oil development in northern Alaska
Luna Bergere Leopold
1969, Report
It is reported that in the spring of 1969 a high official of one of the oil companies was flying over the area of oil development in the vicinity of Prudhoe Bay. He is quoted as saying "If the American people could see what we are doing to their land...
Home range and travels
L.F. Stickel
John A. King, editor(s)
1968, Book chapter, Biology of Peromyscus (Rodentia)
The concept of home range was expressed by Seton (1909) in the term 'home region,' which Burr (1940, 1943) clarified with a definition of home range and exemplified in a definitive study of Peromyscus in the field. Burt pointed out the ever-changing characteristics of home-range area and the consequent...
Seismic seiches from the March 1964 Alaska earthquake
Arthur McGarr, Robert C. Vorhis
1968, Professional Paper 544-E
Seismic seiches caused by the Alaska earthquake of March 27, 1964, were recorded at more than 850 surface-water gaging stations in North America and at 4 in Australia. In the United States, including Alaska and Hawaii, 763 of 6,435 gages registered seiches. Nearly all the seismic seiches were recorded at...
Effects of the earthquake of March 27, 1964, on the Alaska highway system
Reuben Kachadoorian
1968, Professional Paper 545-C
The great earthquake that struck Alaska about 5:36 p.m., Alaska standard time, Friday, March 27, 1964 (03:36:1.3.0, Greenwich mean time, March 28, 1964), severely crippled the highway system in the south-central part of the State. All the major highways and most secondary roads were impaired. Damage totaled more than $46...