Bulletin, Issue 915

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U.S. Government Printing Office, 1940 - Geology

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Page 41 - Texas, assignor to Standard Oil Development Co., a corporation of Delaware: US patent 2099837, issued November 23, 1937.
Page 69 - Temperature measurements with an electrical resistance thermometer in a deep borehole on the East Rand: Chem., Met.
Page 163 - ... parties (12 geological crews, 4 magnetometer, 9 gravity, and 14 seismographs), the Maturin Basin is one of the most promising oil areas in the world, and it is only a matter of time until several new fields will be producing on a commercial basis. — Author's summary and conclusion. 5261. Osborn, EF, Structural petrology of the Val Verde tonalite, southern California: Geol. Soc. America Bull., vol. 50, No. 6, pp. 921-950, Washington, DC, 1939. Micrometric analyses of the Val Verde tonalite were...
Page 54 - The currents owe their existence to inhomogeneities continually created by turbulent com ective motions. In order to obtain a nonvanishing resultant angular momentum of the currents around the earth's axis, the current system must exhibit a particular asymmetry. The latter is shown to originate through the preponderant influence of the C'oriolis force upon the convective motions.
Page 166 - to be awarded for distinguished attainment and outstanding contribution to the advancement of cooperative research in fundamental geophysics.
Page 40 - Union, 5241 Broad Branch Road, NW., Washington, DC, USA Price, part 1, $3.50; part 2, $1.75. 4865. Neumann, Frank, United States earthquakes, 1936: US Coast and Geodetic Survey Serial No. 610, 44 pp., 10 illus., Washington, 1938. Price, 10 cents. This publication is a summary for the calendar year 1936 of earthquake activity in the United States and the regions under its jurisdiction. Contents: (1) Introduction, (2) Instrumental results, (3) Noninstrumental results, (4) Miscellaneous activities,...
Page 91 - Electr., vol. 44, No. 2, pp. 137-156, Baltimore, Md., 1939. The forthcoming volume of results at the Watheroo and Huancayo Magnetic Observatories will contain an extensive table of about 40,000 harmonic coefficients for the diurnal variations in the horizontal magnetic intensity H at Huancayo Magnetic Observatory (Peru) for every Individual day of the years 1922 to 1936. This collection of coefficients, a new feature in observatory compilations, represents an advanced stage of reduction of the original...
Page 19 - Calif., 1941. Data were assembled for about 320 earthquakes, including nearly all those available for which determinations of epicentral location, time of occurrence, and focal depth were considered reliable. They were analyzed collectively and in selected geographical groups by the method of periodogram analysis, which appeared most suitable. Tests were made on periods of 6, 12, and 14 months and for correlation with twice the lunar- and solar-hour angles. None of the results could be interpreted...
Page 67 - Sci., vol. 35A, pp. 231-245 (1938). The radium content of various types of granites of Finland is compared with certain petrologic characteristics of the several rocks. No relation is found between radium and potash or ferrous oxide, but for granites belonging to the same type the radium content can be correlated with the amount of biotite. (981) The system, CaSO4 — H,OE Posnjak.
Page 19 - The correlation suggested an association of tidal stress with earthquake occurrence. Accordingly, computations were made on the magnitude and form of the stress variations due to earth tides. It was concluded that tidal stress variations approximate harmonic changes sufficiently well to warrant a search for lunar-hour angle correlation but are too irregular to make the statistical results of such studies valuable in furthering information concerning the mechanics and environment of deep-seated earthquakes....

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