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

184757 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 7104, results 177576 - 177600

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Summary of Kinoshita's kuroko deposits of Japan
John J. Collins
1950, Economic Geology (45) 363-376
Summarized translation of a report by Kameki Kinoshita, published in Japanese in 1943, on kuroko deposits (black ore deposits) of Japan. "Kuroko means two things. One is the common mixture of sphalerite, galena, and barite which is ordinarily black to grayish white, depending on the proportion of barite. The other...
Effects of earthquakes, trains tides, winds, and atmospheric pressure changes on water in the geologic formations of southern Florida
Garald G. Parker, Victor Timothy Stringfield
1950, Economic Geology (45) 441-460
Determination of such fundamental hydrologic factors as the coefficients of permeability, transmissibility, and storage; areas of recharge and discharge; direction of ground-water movement; the safe yield; and other pertinent, related factors are based in part upon water-level measurements in wells. But these water-level readings, if not properly understood or weighted,...
Value of domestic production of minerals from various classes of rocks
Vincent E. McKelvey, J.E. Crawford, D.F. Davidson, Robert Leland Boardman
1950, Economic Geology (45) 470-479
Fluids and sedimentary rocks accounted for 48 and 36 percent, respectively, of the total value of the 1946 domestic mineral production. The epigenetic (vein and replacement) and metamorphic deposits each contributed 6 percent of the total, and residual and igneous deposits accounted for 3 and 1 percent, respectively. Fuels were...
Dispersion of copper from the San Manuel copper deposit, Pinal County, Arizona
T. S. Lovering, Lyman C. Huff, H. Almond
1950, Economic Geology (45) 493-514
At San Manuel, near Tucson, Arizona, recent churn drilling has blocked out large reserves of low-grade "porphyry copper" ore. This virgin deposit has a small outcrop and seems ideally suited for a geochemical study of the dispersion pattern produced by weathering in a desert climate. Samples of soils, alluvium, ground...
The appraisal of ore reserves at a Japanese copper mine
John J. Collins
1950, Economic Geology (45) 568-573
Estimates of ore reserves at major Japanese metal mines seem, at first glance, to be readily understandable to American engineers and geologists. Close scrutiny, however, generally reveals unexpected features at each mine. For example, the Hitachi copper mine formerly segregated its developed ore reserve into positive and probable on the...
"Lockhartia" cushmani Applin and Jordan and notes on two previously described foraminifera from tertiary rocks in Florida
Esther R. Applin, Louise Jordan
1950, Journal of Paleontology (24) 474-478
This paper discusses changes made in the names of three foraminiferal species originally described by the writers, with particular emphasis on "Lockhartia" cushmani Applin and Jordan. The internal characters of this form are fully described and compared with the diagnostic characteristics of the genus Lockhartia Davies and with the geno-lectotype...