Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

11370 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 375, results 9351 - 9375

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Map showing distribution of copper, lead, zinc, mercury, and arsenic in the sediments off the coast of northern Alaska
Peter Barnes, Kam Leong, Charles Gustafson
1974, Miscellaneous Field Studies Map 614
A developing interest in the normal distributions of potentially harmful substances in the natural environment has prompted a baseline study of a virtually pristine region along the northern coast of Alaska. The information reported here outlines the background values of copper, lead, zinc, cadmium, mercury, and arsenic in the nearshore...
Ultramafic rocks of the Eagle quadrangle, east-central Alaska
Helen L. Foster, Terry E.C. Keith
1974, Journal of Research of the U.S. Geological Survey (2) 657-669
More than 97 separate occurrences of ultramafic rocks, some of which are included in a north west-trending zone of alpine-type ultramafic rocks, have been mapped in the Eagle quadrangle, east-central Alaska. They are divided into three groups primarily on the basis of degree of serpentinization. Group I consists of lens-shaped bodies...
Sea otters: Their role in structuring nearshore communities
J. A. Estes, J. F. Palmisano
1974, Science (185) 1058-1060
A comparison of western Aleutian Islands with and without sea otter populations shows that this species is important in determining littoral and sublittoral community structure. Sea otters control herbivorous invertebrate populations. Removal of sea otters causes increased herbivory and ultimately results in the destruction of macrophyte associations. The observations suggest...
Chemical variations across the Alaska-Aleutian Range batholith
Bruce L. Reed, Marvin A. Lanphere
1974, Journal of Research of the U.S. Geological Survey (2) 343-352
A study of 79 chemical analyses of plutonic rocks in the northern part of the Alaska-Aleutian Range batholith shows that K2O and SiO2 in Late Cretaceous and Tertiary rocks decrease toward the Pacific margin and that Al2O3 and CaO increase. Plots for Fe2O3, FeO, MgO, and TiO2 suggest a...
The Border Ranges Fault in south-central Alaska
E. M. MacKevett, George Plafker
1974, Journal of Research of the U.S. Geological Survey (2) 323-329
The Border Ranges fault, a major fault of southern Alaska, can be traced for more than 1,000 km arcuately eastward from Kodiak Island to the St. Elias Mountains. Throughout its extent, the fault juxtaposes upper Paleozoic and lower Mesozoic rocks on the north against upper Mesozoic and Tertiary rocks. This...
Alaska
E. H. Lathram, Arthur Grantz, D.F. Barnes, David A. Brew, A. Thomas Ovenshine, George Plafker, R. L. Detterman, H.L. Foster, M. Churkin Jr., W. W. Patton Jr., J. M. Hoare, I.L. Tailleur, W. P. Brosge, T. P. Miller, C.L. Sainsbury
1974, Geological Society Special Publication (4) 563-589
No abstract available....
A prototype global volcano surveillance system monitoring seismic activity and tilt
E.T. Endo, P.L. Ward, D.H. Harlow, R. V. Allen, J. P. Eaton
1974, Bulletin Volcanologique (38) 315-344
The Earth Resources Technology Satellite makes it feasible for the first time to monitor the level of activity at widely separated volcanoes and to relay these data almost instantancously to one central office. This capability opens a new era in volcanology where the hundreds of normally...
Garnet-clinopyroxenite from the Red Mountain pluton, Alaska
R. B. Forbes, R. C. Swainbank
1974, GSA Bulletin (85) 285-292
Several lens-shaped and irregular masses of garnet-clinopyroxenite occur along the north margin of the Red Mountain pluton, near Seldovia, Alaska. The pluton is composed of intercalated dunite, clinopyroxenite, and banded chromite layers. The chromite layers appear to dip toward the center of the mass, but they have been deformed, and...
Hydraulic tests in hole UAe-2, Amchitka Island, Alaska
Wilbur C. Ballance
1973, Report
Inflatable straddle packers were used to isolate and test 19 intervals ranging from 56 to 747 meters (183 to 2,450 feet) each in hole UAe-2, Amchitka Island, Alaska. Packer seats were poor in part of the hole because of unstable wall conditions. Thus, some zones had to be tested several...
Revised age and structural interpretations of Nuka Formation at Nuka Ridge, northwestern Alaska: Geologic notes
I.L. Tailleur, B. L. Mamet, J.T. Dutro Jr.
1973, American Association of Petroleum Geologists Bulletin (57) 1348-1352
New collections of foraminifers and macrofossils from Nuka Ridge, the type area of the enigmatic Nuka Formation, demonstrate that the type Nuka Formation is not a continuous stratigraphic sequence as originally described. Paleontologic evidence indicates the presence of a structurally repeated sequence at Nuka Ridge consisting of Upper Mississippian (Meramec...
Probable rift origin of Canada Basin, Arctic Ocean
Irvin L. Tailleur
1973, Book chapter, Arctic geology: proceedings of the Second International Symposium on Arctic Geology (AAPG Memoir 19)
Formation of the Canada basin by post-Triassic rifting seems the most workable and logical hypothesis on the basis of available information. Speculated counterclockwise rotation of the Alaska-Chukchi continental edge best rationalizes the complex geology of northern Alaska, whereas the assumption that a single continental block was present before the Jurassic...
Sea level history in Beringia during the past 250,000 years
D.M. Hopkins
1973, Quaternary Research (3) 520-540
This paper attempts to relate current knowledge of sea-level history in Beringia to the Broecker-van Donk “Termination” concept of climatic and sea-level history. The Einahnuhtan transgression is thought to represent Termination III, which according to Broecker and van Donk, took place about 225,000...