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Page 6998, results 174926 - 174950

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Some notes on the relation of ground‐water levels to pond levels in limestone sinks of southwestern Georgia
E. L. Hendricks
1954, Eos, Transactions, American Geophysical Union (35) 796-804
Records of water levels in limesink ponds in southwestern Georgia and of water‐table levels in the vicinity of these ponds are used to demonstrate: (1) some ponds with highly impermeable beds are virtually unaffected by water‐table levels, except when water‐table levels are above the rim of the impervious materials; (2) interchange of water between pond and water table occurs when beds are relatively permeable. Three phases in the relation between pond level and water‐table level are recognized: (1) water‐table level higher than pond level causing ground‐water flow into the pond; (2) ground‐water level below pond level but in direct contact...
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...