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

165626 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 6278, results 156926 - 156950

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
The gold pan: A neglected geological tool
J.B. Mertie Jr.
1954, Economic Geology (49) 639-651
The gold pan is ordinarily regarded as a tool for sampling placer deposits. Another and very important application is shown to be the sampling and study of decomposed bedrock, in regions where outcrops of hardrock are scarce or lacking. This technique was proposed and used by Derby, an American geologist...
A variable, circular‐arc rule; An aid in constructing stereographic projections
Robert E. Wallace, B. Fried, John Guptil
1954, Eos, Transactions, American Geophysical Union (35) 645-646
A drafting instrument which provides a ruling edge for drawing arcs of circles the radii of which are unusually long is described. A complete range of arcs of different curvature, within the limits prescribed by the construction of the instrument, are obtainable. This instrument was developed originally to allow accurate construction of circular arcs of very low...
Aeromagnetic surveys in the Aleutian, Marshall, and Bermuda Islands
Fred Keller Jr., J. L. Meuschke, L.R. Alldredge
1954, Eos, Transactions, American Geophysical Union (35) 558-572
Total‐intensity aeromagnetic surveys of the Aleutian Marshall, and Bermuda Islands were completed in 1948. The anomalies associated with the Aleutian volcanoes are attributed mainly to topographic relief and are not an indication of the degree of volcanic activity. Eniwetok presents a magnetic pattern that would be produced by an irregular‐shaped rimmed depression in the basement, modified by the two adjoining seamounts, and differs from...
Studies on avian malaria in vectors and hosts of encephalitis in Kern County, California. I. Infections in avian hosts
C. M. Herman, W. C. Reeves, H. E. McClure, E. M. French, W. M. Hammon
1954, American Journal of Tropical Medicine and Hygiene (3) 676-695
An epizoological study of Plasmodium infections in wild birds of Kern County, California, in the years 1946 through 1951 greatly extended knowledge of the occurrence of these parasites and their behavior in nature. Examination of 10,459 blood smears from 8,674 birds representing 73 species resulted in the observation of Plasmodium...
The geological approach to dating archaeological sites
Troy L. Pewe
1954, American Antiquity (20) 51-61
Abasic Question that must be answered for any archaeological site is, how old is it? Although some archaeological sites can be dated on the basis of archaeological correlations alone and although dendrochronological (Giddings, 1952, pp. 105-110) and radiocarbon methods give absolute ages for other sites, many sites can be dated only by methods based on the geologists' knowledge of geographic and...
Geologic interpretation of seismic data along the proposed relocation of Route 138; stations 59+00 to 83+00 in Brockton, Mass.
Robert M. Hazelwood, Robert O. Castle
1954, Open-File Report 54-119
This investigation was made to determine the surface and subsurface geological conditions along the proposed relocation of Route 138 in the vicinity of the Torrey Street crossing in Brockton, Mass. The field work was done in April 1952 as part of cooperative program of the Commonwealth of Massachusetts, Department of...
Copper cities copper deposit, Globe-Miami district, Arizona
N. P. Peterson
1954, Economic Geology (49) 362-377
The Copper Cities copper deposit in the Globe-Miami district, Arizona, is now in process of development. It is of the "porphyry" type and occurs in a body of quartz monzonite that has been intruded by smaller masses of granite porphyry. The hypogene sulfides are pyrite, chalcopyrite, and a very little molybdenite. Pyritic mineralization extends over a large area...