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Page 7121, results 178001 - 178025

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Sheet structure, a major factor in the occurrence of ground water in the granites of Georgia
Harry E. LeGrand
1949, Economic Geology (44) 110-118
Increasing demand for supplies of ground water in the Piedmont of Georgia has necessarily focused attention on granitic rocks, which have a considerable areal extent in this part of the state. These rocks have the property generally known as sheet structure. Major parting planes resulting from sheeting are usually sub-parallel...
Vestigial zinc in surface residuum associated with primary zinc ore in East Tennessee
Herbert Edwin Hawkes, Herbert Williams Lakin
1949, Economic Geology (44) 286-295
A series of samples of residual clay at the Friends Station zinc deposit, Tenn., was collected and analyzed for zinc. Results indicate that residuum containing 0.05 percent Zn and more is the product of weathering of limestone and dolomite containing zinc mineralization. Chemical analysis of residual clays for zinc shows...
Field method for the determination of zinc in soils
Rollin Elbert Stevens, Hy Almond
1949, Economic Geology (44) 296-306
A method is described for the field estimation of total zinc in soils. A small sample of soil is fused with potassium bisulfate, the fused mass dissolved in water, buffered at pH 4 to 5.5 with acetate buffer, and sodium thiosulfate added to form complex ions with metals that might...
Research in coal paleobotany since 1943
James M. Schopf
1949, Economic Geology (44) 492-513
The varied applications of paleobotany to coal resource studies, coal technology, and to fundamental physical and chemical research on coal are briefly indicated. The usual conception of paleobotany is not as broad as this, and many of the studies of fossil plants have been conducted without reference to the part...
Origin of the Bendigo saddle reefs with comments on the formation of ribbon quartz
Frederick Mason Chace
1949, Economic Geology (44) 561-597
"Several textural varieties of quartz, together with ore textures and structural relations, indicate that (1) open-space filling, (2) replacement, and (3) growth by accretion were active processes in the formation of saddle reefs and related quartz bodies of the Bendigo goldfield, Australia. The relative importance of each process varied with...
Summary of microfossil investigations, April 1948 to April 1949 with special reference to the south Barrow and Simpson areas
Helen N. Loeblich
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 26
This report summarizes the results of microfossil investigations for he past year. It includes the microfossil data from the two South Barrow Test Wells and studies of samples from outcrop material an from seismograph shot holes. In addition, new information bearing on the special study of microfossils from the Cape...
Heavy mineral zonation of Cretaceous and Tertiary rocks of the central area of northern Alaska
Ernest H. Lathram
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 29
This report presents the general conclusions pertaining to the correlation of Cretaceous and Tertiary rocks in test wells and outcrops in the central area of northern Alaska (fig. 1) by means of heavy minerals. Approximately 1.000 drill and outcrop samples have been studied. In order to relate the materiel here...
Study of radioactive equilibrium in Carnotite ores of the Colorado Plateau
L. R. Stieff, M.N. Girhard, T. W. Stern
1949, Trace Elements Investigations 106
The purpose of this study was to determine the age of Colorado Plateau carnotite. In addition to quantitative analyses of uranium and lead, the radium-uranium equilibrium of each sample was studied. Of the 12 samples studied, 10 are deficient in radium. If a minimum age of 130 million years is...
Submarine geology and topography in the Northern Marshalls
K.O. Emery, J. I. Tracey Jr., H. S. Ladd
1949, Eos, Transactions, American Geophysical Union (30) 55-58
The atomic bomb tests at Bikini in 1946 provided an opportunity to study the characteristics of atolls using modern surveying techniques. The work has shown that many of the important features, both above and below sea level, are definitely related to the direction of the prevailing winds, waves, and currents....
Calculated gravity anomaly produced by possible fault under line 27-48
Stephen W. Dana
1949, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 4
The seismograph data from Line 27-48 of Party 47 indicates the possibility of a high angle fault win a displacement of roughly 1,000 feet under South Barrow Test Well No. 2. This fault vas discussed in E. Wiancko's report for United Geophysical Company entitled "Report of Reflection Seismograph Survey in...