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

165657 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 5389, results 134701 - 134725

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Copper Deposits in Sedimentary and Volcanogenic Rocks
Elizabeth B. Tourtelot, James David Vine
1976, Professional Paper 907-C
Copper deposits occur in sedimentary and volcanogenic rocks within a wide variety of geologic environments where there may be little or no evidence of hydrothermal alteration. Some deposits may be hypogene and have a deep-seated source for the ore fluids, but because of rapid cooling and dilution during syngenetic deposition...
Interpretation of Landsat imagery of the Tanacross quadrangle, Alaska
Nairn R. Albert, William Clinton Steele
1976, Open-File Report 76-850
In this study of Landsat imagery for the Tanacross quadrangle, Alaska, two fundamentally different types of images were used: (1) a black and white, single band, Landsat mosaic of Alaska, constructed with images that are not computer-enhanced; and (2) various types of computer-enhanced Landsat images....
ERTS-1, a new window on our planet
Richard S. Williams Jr., William Douglas Carter
1976, Professional Paper 929
The launch, on July 23, 1972, of the first Earth Resources Technology Satellite (ERTS-1) by the National Aeronautics and Space Administration was a major step forward in extending man 's ability to inventory the Earth 's resources and to evaluate objectively his impact upon the environment. ERTS spacecraft represent the...
Platinum deposits of the Goodnews Bay district, Alaska
John Beaver Mertie Jr.
1976, Professional Paper 938
Platinum placers were discovered in 1926 in a small area south of Goodnews Bay, in southwestern Alaska. Beginning in 1927, the placers were worked for 7 years by small-scale mining methods; in later years dragline excavators and a dredge were utilized. These deposits are important, not only because they are...
Numerical simulation analysis of the interaction of lakes and ground water
Thomas C. Winter
1976, Professional Paper 1001
Because the interrelationship of lakes and ground water is perhaps the least understood aspect of lake hydrology, vertical-section, steadystate, numerical-model simulations were run to evaluate the factors that control the interaction of lakes and ground water. The study is concerned only with lakes encircled by water-table mounds that are at...
Computer-enhanced LANDSAT imagery as a tool for mineral exploration in Alaska
Nairn Albert, Pat S. Chavez
1976, Open-File Report 76-65
Recent work in the Nabesna and McCarthy quadrangles, Alaska, indicates that computer-enhanced LANDSAT imagery shows many of the known mineral deposits and can help in the prediction of potential mineral occurrences. False color, "simulated natural color" and color ratio techniques, were used successfully in conjunction with a black and white,...
Lithium in sediments and rocks in Nevada
Robert G. Bohannon, Allen L. Meier
1976, Open-File Report 76-567
Reconnaissance geochemical sampling has been conducted by the Lithium Resource Program of the United States Geological Survey for much of the Western U.S. Sediment, rock, and brine samples have been collected in many states, but this report describes just those solid samples collected in Nevada. Further reports by other members...
Deep Ocean Mining Environmental Study, Northeast Pacific nodule province; geology and geochemistry of Site C
James L. Bischoff
1976, Open-File Report 76-548
Probably the single most obvious and important environmental effect during deep-sea mining operations will be the resuspension and discharge of large amounts of sea floor sediment into the water column.  The objectives of the geological program, therefore, were two-fold.  The first was to provide baseline information on the sediment system...