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

165359 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 6156, results 153876 - 153900

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Airborne radioactivity surveys in geologic exploration
R.M. Moxham
1958, Trace Elements Investigations 662
The value of airborne radioactivity surveys in guiding uranium exploration has been well established. Recent improvements in circuitry and development of semiquantitative analytical techniques permit a more comprehensive evaluation of the geologic distribution of radioactive materials that may prove useful in exploration for other minerals and in regional geologic studies....
Suggestions to authors of the reports of the United States Geological Survey
U.S. Geological Survey
1958, Report
Knowledge acquired by the Geological Survey through programs of research and investigations has no value to the public if it remains in office files or in the minds of the scientists and engineers who did the work. The full discharge of the Survey's responsibilities is attained only by making its...
Relationship between Secchi disc readings and light penetration in Lake Huron
Alfred M. Beeton
1958, Transactions of the American Fisheries Society (87) 73-79
Fifty-seven paired photometer and Secchi disc measurements made at 18 stations in Saginaw Bay and Lake Huron support the view that a counter-clockwise current usually occurs in the Bay with more transparent Lake Huron water flowing in along the northwest shore and less transparent Bay water flowing out along the...
Role of clay minerals in the transportation of iron
D. Carroll
1958, Geochimica et Cosmochimica Acta (14) 1-28
The clay minerals have iron associated with them in several ways:1.(1) as an essential constituent2.(2) as a minor constituent within the crystal lattice where it is in isomorphous substitution and3.(3) as iron oxide on the surface of the mineral platelets. Nontronite, “hydromica,” some...
Biogeochemistry of the rare-earth elements with particular reference to hickory trees
W. O. Robinson, H. Bastron, K. J. Murata
1958, Geochimica et Cosmochimica Acta (14) 55-67
Hickory trees concentrate the rare-earth elements in their leaves to a phenomenal degree and may contain as much as 2300 p.p.m. of total rare earths based on the dry weight of the leaves. The average proportions of the individual elements (atomic percent of the total rare-earth elements) in the leaves...
The water, deuterium, gas and uranium content of tektites
I. Friedman
1958, Geochimica et Cosmochimica Acta (14) 316-324
The water content, deuterium concentration of the water, total gas and uranium contents were determined on tektite samples and other glass samples from Texas, Australia, Philippine Islands, Java, French Indo-China, Czechoslovakia, Libyan Desert, Billiton Island, Thailand, French West Africa, Peru, and New Mexico. The water content ranges from 0.24 per...
Determination of the oxidation state of uranium in apatite and phosphorite deposits
R. S. Clarke Jr., Z. S. Altschuler
1958, Geochimica et Cosmochimica Acta (13) 127-142
Geological and mineralogical evidence indicate that the uranium present in apatite may proxy for calcium in the mineral structure as U(IV). An experimental investigation was conducted and chemical evidence was obtained that establishes the presence of U(IV) in apatite.The following analytical procedure was developed for the determination of U(IV). Carbonatefluorapatite...
The next decade in geochemistry
E. Ingerson
1958, Geochimica et Cosmochimica Acta (14) 185-203
The purpose, associations, functions; and activities of the Geochmical Society are reviewed briefly. Work on the Colorado Plateau uranium deposits is described as an example of what geochemical research, in conjunction with detailed field work, mineralogical studies, and related techniques can contribute to the understanding of a type of deposit....