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

36989 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 1132, results 28276 - 28300

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Preliminary data on some Precambrian deposits of zinc-copper-lead sulfides and zinc spinel (granite) in Colorado
Douglas M. Sheridan, William H. Raymond
1977, Open-File Report 77-607
Precambrian sulfide deposits in the Southern Rocky Mountains in Colorado are being studied and re-evaluated according to geologic concepts which were developed in recent years in other parts of the world during successful research regarding economic massive sulfide deposits. These studies, initiated in 1974 in Colorado by the U.S. Geological...
Selected Geological Survey, U.S. Bureau of Mines, and Alaska Division of Geological and Geophysical Surveys reports and maps on Alaska released during 1976, indexed by quadrangle
Edward Huntington Cobb
1977, Open-File Report 77-177
This open-file report lists all Geological Survey, U.S. Bureau of Mines, and State of Alaska Division of Geological and Geophysical Surveys reports and maps on the geology, geophysics, and mineral and water resources of Alaska published or released to open files in 1976. They are listed by the quadrangles (scale...
Factors limiting the sensitivity and dynamic range of a seismic system employing analog magnetic tape recording and a seismic amplifier with adjustable gain settings and several output levels
Jerry P. Eaton, John R. Van Schaack
1977, Open-File Report 77-224
In the course of modernizing the low-speed-tape-recorder portable seismic systems and considering the possibilities for the design of a cassette-tape-recorder seismic refraction system, the factors that limit the sensitivity and dynamic range of such systems have been reviewed. These factors will first be stated briefly, and then their influence on...
The Pierre Shale, northern Great Plains; a potential isolation medium for radioactive waste
George W. Shurr
1977, Open-File Report 77-776
The purpose of this reconnaissance is to assess the potential of the Pierre Shale, of Late Cretaceous age, as a possible isolation medium for radioactive wastes. The regional stratigraphic and structural setting of the Pierre Shale in the northern Great Plains is summarized from subsurface data. Geologic attributes mapped and...
Preferred stream discharges for salmon spawning and rearing in Washington
C.H. Swift
1977, Open-File Report 77-422
Stream discharges preferred by salmon for spawning were determined from relationships between discharge and spawnable area at 84 study reaches on 28 streams in Washington. Preferred discharges for spawning were found statistically equivalent for chinook, pink and chum salmon. Regression equations developed for estimating discharges preferred by these species for...
Summary of watershed conditions in the vicinity of Redwood National Park, California
Richard J. Janda
1977, Open-File Report 78-25
The Redwood Creek Unit of Redwood National Park is located in the downstream end of an exceptionally rapidly eroding drainage basin. Spatial distribution and types of erosional landforms, observed in the field and on time-sequential aerial photographs, measured sediment loads, and the lithologic heterogeneity of streambed materials indicated (1) that...
Program of operation for the National Water Data Exchange (NAWDEX)
Melvin D. Edwards
1977, Open-File Report 77-708
The National Water Data Exchange (NAWDEX) has been established as a nationwide program directed at improving access to water and water-related data and disseminating information about the availability of these data throughout the entire water-resources community. NAWDEX is composed of a confederation of water-oriented organizations working together to facilitate the...