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Page 6146, results 153626 - 153650

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Eastern and central Montana as a possible source area of uranium
Frank Clarkson Armstrong
1957, Economic Geology (52) 211-224
Geologic settings in central and eastern Montana and in a few places in southwestern Montana are similar to the settings in areas favorable for the occurrence of uranium deposits. Several areas in Montana seem especially favorable for the occurrence of uranium.The alkalic igneous rock province of central Montana is similar...
A truckmounted spectrographic laboratory for use in geochemical exploration
Frank C. Canney, A.T. Myers, F. N. Ward
1957, Economic Geology (52) 289-306
A truck-mounted spectrographic laboratory has been designed and built by the U. S. Geological Survey to investigate the feasibility of using and transporting such equipment in the field as an aid in supplying rapid on-the-spot analytical data to geochemical exploration field parties.The laboratory is housed inside a 7- X 12-foot...
Some limitations on the possible composition of the ore-forming fluid
Paul B. Barton
1957, Economic Geology (52) 333-353
The activity ratios of various important anions (S (super =) , CO 3 (super =) , SO 4 (super =) , OH (super -) , F (super -) , and Cl (super -) ) in hydrothermal solutions at the time of deposition are evaluated using a simple thermodynamic technique. The ratios are interpreted in...
Effects of radon in drill holes on gamma-ray logs
Lowell Sinclair Hilpert, Carl Maurice Bunker
1957, Economic Geology (52) 438-455
Drill holes in uranium deposits in the Todilto limestone of Late Jurassic age near Grants, New Mexico, do not yield duplicate gamma-ray logs when probed at different times; some logs show equivalent uranium greatly in excess, in thickness and grade, of the chemical and laboratory radiometric analyses. Radon and its...
Occurrence of selenium in sulfides from some sedimentary rocks of the western United States
R. G. Coleman, Maryse Helen Delevaux
1957, Economic Geology (52) 499-527
Investigations of the minor- and trace-element content of sulfides associated with uranium ore deposits from sandstone-type deposits have shown that selenium commonly substitutes for sulfur. The Morrison formation and Entrada sandstone of Jurassic age and the Wind River formation of Eocene age seem to be...
Discussion of “Application of the modified einstein procedure for computation of total sediment load”
K. B. Schroeder, C. H. Hembree
1957, Eos, Transactions, American Geophysical Union (38) 768-773
Basically, any theory consists of a set of assumptions and various conclusions which are logically derived therefrom. An assumption, as the term is to be used here, may be based on an observed fact or relationship, a definition, an undefined (but generally accepted and understood) concept; or it may be...
Thermal waters of volcanic origin
Donald E. White
1957, GSA Bulletin (68) 1637-1658
Waters of widely differing chemical compositions have been considered at least in part volcanic in origin, and are commonly associated with each other in the same area. Do any or all of these types contain volcanic components, and if so, how are the different types derived?To determine the probable characteristics...
Magmatic, connate, and metamorphic waters
Donald E. White
1957, GSA Bulletin (68) 1659-1682
Some major types of water of “deep” origin are believed to be recognizable from their chemical and isotopic compositions. Oil-field brines dominated by sodium and calcium chlorides differ markedly from average ocean water. In general, the brines are believed to be connate in origin (“fossil” sea water) with a negligible...
Thermal effects of the ocean on permafrost
Arthur H. Lachenbruch
1957, GSA Bulletin (68) 1515-1530
In high latitudes the large difference between the mean annual temperature at the ground surface and in the unfrozen sediments beneath bodies of water can affect ground temperatures to depths of several hundred feet. The effect is of particular interest near the edge of the ocean where it depends upon...
Refuge bird lists
U.S. Bureau of Sport Fisheries and Wildlife
1957, Wildlife Leaflet 384
No abstract available....
Radiocarbon age of the damariscotta shell heaps
W.H. Bradley
1957, American Antiquity (22) 296-296
The large oyster shell heaps on both sides of the Damariscotta River, just north of the towns of Damariscotta and Newcastle, Maine, have been known for many years and both geologists and archaeologists have speculated about their age. During the summer of 1955 I made 2 collections of Mya shells from...