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Page 6106, results 152626 - 152650

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Water‐level fluctuations caused by Montana earthquake
Jose Alves Da Costa
1959, Eos, Transactions, American Geophysical Union (40) 346-346
The major earthquake of August 17, 1959, near the Montana‐Wyoming border had marked effects on water levels and artesian pressures in wells throughout the United States. Preliminary reports from field offices of the U. S. Geological Survey in 21 states show that water‐level fluctuations were automatically recorded in 136 observation...
Turtleback faults of Death Valley, California: A reinterpretation
Harald Drewes
1959, GSA Bulletin (70) 1497-1508
Turtlebacks are smooth, curved surfaces, which form north-northwestward-plunging elongate domes on the east side of Death Valley. These surfaces are roughly parallel to bedding or foliation of anticlines in Precambrian schist, gneiss, and marble. Late Cenozoic fan and playa deposits are faulted over these surfaces along the turtleback faults. Previously...
History of Imuruk Lake, Seward Peninsula, Alaska
David M. Hopkins
1959, GSA Bulletin (70) 1033-1046
A study of Imuruk Lake, a large, shallow lake in north-central Seward Peninsula, Alaska, illuminates the climatic history of northwestern Alaska and the tectonic history of central Seward Peninsula during Pleistocene and Recent time. Special interest attaches to the older lake sediments, because they contain evidence concerning the climate, fauna, and...
Granitization, migmatization, and fusion in the northern Entiat Mountains, Washington
D. F. Crowder
1959, GSA Bulletin (70) 827-878
A tabular quartz diorite complex extends along the Entiat Mountains, which form a southeast-trending spur of the Northern Cascade Mountains. The country rocks of the complex are biotite gneiss, probably derived from arkosic sedimentary rocks, and hornblende schist, probably derived from basic volcanic rocks. Their present mineral composition is typical of...
Primary borates in playa deposits: Minerals of high hydration
Siegfried J. Muessig
1959, Economic Geology (54) 495-501
The primary borate minerals in nonmarine bedded borate deposits - those of the playa type, and their deformed derivatives - are the high hydrates. Both field and laboratory data indicate that the high hydrates are the borate minerals that form stable phases at the lowest temperatures: under the surface conditions...
The relation between fresh and salty ground water in southern Nassau and southeastern Queens counties, Long Island, New York
Nathaniel M. Perlmutter, J. J. Geraghty, J. E. Upson
1959, Economic Geology (54) 416-435
An investigation of the geology and ground-water conditions in a part of southwestern Long Island, including the construction of 8 deep and 5 shallow test and observation wells, has been completed by the Geological Survey in cooperation with the Nassau County Department of Public Works and the New York State Water Power and Control Commission.<span...
Geology and uranium-vanadium deposits of the slick rock district, San Miguel and Dolores counties, Colorado
D. R. Shawe, Norbert L. Archbold, G. C. Simmons
1959, Economic Geology (54) 395-415
Sedimentary rocks known in the Slick Rock district in southwestern Colorado range in age from Devonian (?) to Cretaceous, and aggregate about 13,000 feet in maximum thickness. Important uranium-vanadium production has come from deposits in the Salt Wash member of the Morrison formation of Late Jurassic age.The sedimentary rocks are gently folded in...
Ground-water provinces of India
George C. Taylor
1959, Economic Geology (54) 683-697
This paper gives a general resume of ground-water utilization and development and describes the occurrence of water in eight ground-water provinces of India. The paper is based in part on observations of the writer during 1951-55 and in part on earlier work of the Geological Survey of India. Ground water...
Plastic standards for geochemical prospecting
D. B. Hawkins, F. C. Canney, F. N. Ward
1959, Economic Geology (54) 738-744
Plastic standards for use in geochemical prospecting have been prepared by impregnating a clear thermosetting resin with different amounts of a stable dye or colored metal complex. The colored plastic is molded or subsequently milled into convenient shapes to form standards that are less bulky and more stable than the...
Tritium and deuterium content of atmospheric hydrogen
F. Begemann, Irving Friedman
1959, Zeitschrift fur Naturforschung A (14) 1024-1031
The tritium and deuterium content of 24 samples of atmospheric hydrogen collected at ground level near Buffalo. N.Y. (U.S.A.). Hamburg (Germany), and Nürnberg (Germany) during 1954 to 1956 was measured.At the beginning of 1954 the T/H-ratio was found to have been 9.18 · 10-14 i.e. about a factor of 10 higher...
Spectrophotometric study of the magnesium-bissalicylidene-ethylenediamine system
Frank Cuttitta, C. E. White
1959, Analytical Chemistry (31) 2087-2090
Magnesium reacts with bissali-cylene-ethylenediamine in N,N′-dimethylformamide to yield a yellow complex. A spectrophotometric study was made on the reaction as used for the determination of trace amounts of magnesium. Maximum absorbance was obtained at 355 mμ when the solution contained 0.25 ml. of 0.5M isobutylamine per 25-ml. volume. A complex...
Fluorometric study of the magnesium—Bissalicylidene-ethylenediamine aystem
C. E. White, Frank Cuttitta
1959, Analytical Chemistry (31) 2083-2087
Magnesium ions combine with bissalicylidene-ethylenediamine in slightly alkaline N,N′-dimethylformamide to form a highly fluorescent complex which serves for the determination of trace amounts of magnesium. The yellow complex fluoresces blue when irradiated with ultraviolet light. The chelate shows maximum fluorescence excitation at 355 mμ and has a fluorescence emission maximum...
Ion exchange in clays and other minerals
Dorothy Carroll
1959, GSA Bulletin (70) 749-779
Ion exchange in clays and other minerals is dependent on the crystalline structure of the mineral and on the chemical composition of any solution in contact with the mineral. The structures of clay minerals and zeolites are briefly described to provide a background for the discussion of their ion-exchange reactions....