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Page 6484, results 162076 - 162100

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Publication Extents

Not all publications have extents, not all extents are completely accurate
An Eocene flora from trans-Pecos Texas
Edward Wilber Berry
1920, Professional Paper 125-A
During the fall of 1916 I received a small collection of fossil plants which had been obtained during a geologic reconnaissance of the trans-Pecos region of Texas, by Charles Lawrence Baker. A preliminary report was sent to Mr. Baker in November of that year and was quoted in his...
The American species of Orthophragmina and Lepidocyclina
J.A. Cushman
1920, Professional Paper 125-D
Orbitoid Foraminifera, on account of their short stratigraphic range, have proved to be excellent horizon markers, and, because of their wide geographic distribution, they are valuable in correlation. The genus Orbitoides, as now restricted, is found exclusively in deposits of Cretaceous age, Orthophragmina appears to be confined to the...
Forty-first annual report of the Director of the United States Geological Survey
George Otis Smith
1920, Annual Report 41
The appropriations for the public work under the United States Geological Survey for the fiscal year 1919-20 comprised items amounting to $1,586,353.50.   In general the results of the varied activities of the Geological Survey may be regarded as meeting with a constantly increasing measure of public approval, as shown by the...
The use of the two-circle contact goniometer in teaching crystallography
Florence Bascom
1920, American Mineralogist (5) 45-50
The two-circle contact goniometer was devised to supplement the two-circle reflecting goniometer, by furnishing a means for the measurement of medium-sized crystals not provided with sufficiently good reflecting faces for the successful use of the latter instrument. The contact goniometer has however proved itself adapted, in a greater degree even...
Hawaiian Volcano Observatory bulletins - 1920
1920, Report
The Hawaiian Volcano Observatory (HVO) Bulletin series was an informal publication issued between the years 1913 to 1929. Individual issues contain information on volcanic and earthquake activity, volcano research, and volcano monitoring in Hawaii, and issues often included photographs, sketches, and data plots. Information on volcanic activity at other locations...