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Page 6876, results 171876 - 171900

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Not all publications have extents, not all extents are completely accurate
Development of photogrammetry in the U.S. Geological Survey
Morris M. Thompson
1958, Circular 218
Photogrammetry, the science or art of obtaining reliable measurements by means of photography, is now used extensively in topographic mapping. Precise photogrammetric plotting instruments now enable the map maker to extract from aerial photographs much.of the detailed information required for drawing the map that formerly was acquired by laborious ground...
Borate deposits of the Mojave Region, California
Ward C. Smith
1958, Open-File Report 440
Output of the United States borate producers reached approximately 1,000,000 tons in 1957, nearly four times the average annual production of 1941-45. Increasing consumption for long-established uses and several new ones accounts for the rise; further rise, for new uses such as high energy fuels, lies ahead. Among known borate deposits, the largest are at...
Metamorphosed middle Paleozoic fossils from Central Massachusetts, eastern Vermont, and western New Hampshire
A. J. Boucot, G.J.F. Macdonald, C. Milton, James B. Thompson Jr.
1958, Geological Society of America Bulletin (69) 855-870
Study of thin and polished sections and spectrographic analyses indicate that the brachiopod most recently used to date the Bernardston Formation in Massachusetts probably came from Lower Devonian beds (chlorite zone) in Nova Scotia, and not from Bernardston, Massachusetts. Restudy of the faunule from the calcareous quartzite (garnet zone) of...
Stratigraphy of ocoee series, Great Smoky Mountains, Tennessee and North Carolina
P.B. King, J. B. Hadley, R. B. Neuman, W. Hamilton
1958, Geological Society of America Bulletin (69) 947-966
Much of the Great Smoky Mountains, which span the boundary between Tennessee and North Carolina, is formed of the Ocoee series, of later Precambrian age. This is a body of terrigenous clastic sedimentary rocks, which has minor intercalations of limestone and dolomite but no volcanic components or known fossils. The...
The environmental control of sedimentary iron minerals
N.K. Huber
1958, Economic Geology (53) 123-140
An Eh-pH stability diagram is developed for hematite, magnetite, siderite, pyrite, and iron sulfide that indicates the relative position of their stability fields in a normal sea water system. With the exception of the magnetite-siderite relationship, Eh is much more critical than pH. In general terms, hematite is stable under...
The isolation and identification of Trypanosoma cruzi from raccoons in Maryland
B. C. Walton, P. M. Bauman, L. S. Diamond, Carlton M. Herman
1958, American Journal of Tropical Medicine and Hygiene (7) 603-610
Five raccoons trapped at Patuxent Research Refuge, Laurel, Maryland, were found to have trypanosomes in the blood which were morphologically indistinguishable from Trypanosoma cruzi on stained smears. The organism grew well in culture. It developed and reproduced in Triatoma protracta, T. infestans, T. phyllosoma, and Rhodnius prolixus. Experimental infections were produced in raccoons, opossums,...