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

164882 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 6015, results 150351 - 150375

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
The Belt series in Montana, with a geologic map and a section on paleontologic criteria
Clyde Polhemus Ross, B.A.L. Skipp, Richard Rezak
1963, Professional Paper 346
Problems related to the Belt series have been discussed for nearly a hundred years, but the amount of detailed mapping and other quantitative data available, even now, is not commensurate with the importance of the problem.  The present paper is an attempt to summarize existing data in the light of...
Astrogeologic studies, annual progress report, August 25, 1961 - August 24, 1962
U.S. Geological Survey
1963, Open-File Report 63-123
This report, which covers the period August 25, 1961 to August 24, 1962, is the third of a series describing the program of research conducted by the U.S. Geological Survey on behalf of the National Aeronautics and Space Administration.The major long-range objectives of the program are to determine and map...
Investigations of the principal fluorspar districts of Mexico
Ralph Erskine Van Alstine, Samuel Estrada, Ernesto de la Garza
1963, Open-File Report 63-124
As a result of the increasing need for fluorspar, especially in North America, the Mexican fluorspar industry expanded greatly is the 8-year period, 1952-1960. Since 1956, Mexico has been the world's largest producer and exporter of this commodity. From 1956 through 1959 Maltice imported about 90 percent of the fluorspar...
Refraction seismic studies in the Miami River, Whitewater River, and Mill Creek valleys, Hamilton and Butler Counties, Ohio
Joel S. Watkins
1963, Open-File Report 63-133
Between September 17 and November 9, 1962, the U.S. Geological Survey, in cooperation with Ohio Division of Water, Miami Conservancy District, and c,ty of Cincinnati, Ohio, co.,:ducted a refraction seismic study in Hamilton and Butler Counties, southwest Ohio. The area lies between Hamilton, Ohio, and the Ohio River and includes...
An exploration possibility at the Arizona mine, Pershing County, Nevada
R. E. Wallace, Donald Bruce Tatlock
1963, Open-File Report 63-130
At the Arizona mine in Pershing County, Nevada, a block of ground that may contain significant bodies of silver ore at a shallow depth .appears to have been very inadequately explored during early mining activity. The block approximates in arcal extent...
Principal lakes of the United States
Conrad D. Bue
1963, Circular 476
The United States has about 250 fresh-water lakes that are known to have surface areas of 10 square miles or more. Nearly 100 of these are in Alaska, and 100 in Minnesota, Wisconsin, Michigan, New York,, and Maine. Thirty-four fresh-water lakes, exclusive of the Great Lakes, are known to have maximum...
Preparation of water samples for carbon-14 dating
H.R. Feltz, Bruce B. Hanshaw
1963, Circular 480
For most natural water, a large sample is required to provide the 3 grams of carbon needed for a carbon-14 determination. A field procedure for isolating total dissolved-carbonate species is described. Carbon dioxide gas is evolved by adding sulfuric acid to the water sample; the gas is then collected in...
Development of a hand portable rainfall-simulator infiltrometer
I.S. McQueen
1963, Circular 482
Comparisons of relative infiltration of summer thundershowers into undisturbed and treated western dry lands are necessary for guidance of future treatment practices. A system designed for measuring infiltration of simulated rainfall into small plots of undisturbed soil that can be hand-carried to sites inaccessible to vehicles has been developed. Disturbance...
A field method for measurement of infiltration
A.I. Johnson
1963, Water Supply Paper 1544-F
The determination of infiltration--the downward entry of water into a soil (or sediment)--is receiving increasing attention in hydrologic studies because of the need for more quantitative data on all phases of the hydrologic cycle. A measure of infiltration, the infiltration rate, is usually determined in the field by flooding basins...
Methods of collecting and interpreting ground-water data
1963, Water Supply Paper 1544-H
Because ground water is hidden from view, ancient man could only theorize as to its sources of replenishment and its behavior. His theories held sway until the latter part of the 17th century, which marked the first experimental work to determine the source and movement of ground water. Thus founded,...