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  • Nature Publishing Group  (6)
  • Chapmann & Hall  (1)
  • Geological Society of America (GSA)  (1)
  • 1
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    Elasticity, Fracture and Flow (1983)
    Chapmann & Hall
    In:  London, Chapmann & Hall, vol. 558, no. XVI:, pp. 1-14, (ISBN 3-9808493-1-7)
    Details
    Publication Date: 1983
    Keywords: Textbook of geophysics ; Rock mechanics ; Fracture ; Elasticity ; Rheology
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
    Electronic Resource
    Electronic Resource
    Sub-surface Temperatures on the Moon (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 1316-1317 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Information about the thermal conductivity near the surface is obtained from optical and radio microwave observations of the variation of the surface temperature during an eclipse or throughout a lunation. These yield a value of (Kpc)~112, where K, p and c are the thermal conductivity, density and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1831316a0
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Nature of the Surface of the Moon (1950)
    [s.l.] : Nature Publishing Group
    Nature 166 (1950), S. 1026-1026 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We made similar calculations in connexion with the microwave observations of Piddington and Minnett3, but have taken the matter a good deal further. In the accompanying graph, the dots show Pettit s4 observations of the 1939 eclipse, while curve I is calculated for a solid with (Kc)-1/2 = 1,030 : ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1661026a0
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Production of Electron Pairs (1941)
    [s.l.] : Nature Publishing Group
    Nature 148 (1941), S. 86-86 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SOME time ago we described a method1 for calculating rigorously (neglecting screening) the cross-section for production of electron-positron pairs in the field of a nucleus by a beam of γ-rays. This method also gave the energy distribution of the electrons or positrons. Results ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/148086b0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    On Bremsstrahlung (1937)
    [s.l.] : Nature Publishing Group
    Nature 140 (1937), S. 108-109 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE method previously used1 to calculate the cross-section for pair production by a beam of y-rays has been extended to deal with transitions of a Dirac electron between two states of positive energy in a Coulomb field. It is thus theoretically possible to obtain an exact ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/140108b0
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Production of Electron Pairs (1936)
    [s.l.] : Nature Publishing Group
    Nature 137 (1936), S. 781-782 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN a recent paper1 we discussed the creation of positive-negative electron pairs by a beam of γ-rays traversing lead, with atomic number Z = 82. Results have since been obtained with Z = 50 and Z = 65 for γ-rays of energy hv = 3mc2. It is of interest to compare these with ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/137781b0
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  • 7
    Electronic Resource
    Electronic Resource
    Angular Distribution of Electron Pairs (1938)
    [s.l.] : Nature Publishing Group
    Nature 142 (1938), S. 573-573 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A NUMBER of experiments have been made on the angular distribution of electron-positron pairs liberated by a beam of γ-rays, but the results, where it is possible to compare, them, do not seem to be in agreement. It is therefore of interest to see what the theory predicts, and in the following ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/142573a0
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  • 8
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    Chronology of the Eocene continental deposits of Africa: Magnetostratigraphy and biostratigraphy of the El Kohol and Glib Zegdou Formations, Algeria (2012)
    Geological Society of America (GSA)
    Details
    Publication Date: 2012-09-01
    Description: Despite numerous discoveries that have considerably enriched the African-Arabian Tertiary fossil record over the last decades, our knowledge of the evolutionary history of many continental African vertebrate groups during the Paleogene period remains inadequate, particularly when it is compared with the fossil records of Europe or North America. The Eocene Epoch in Africa is especially poorly documented, being restricted to few fossiliferous localities. Our understanding of the early Tertiary emergence, diversification, and paleobiogeographic history of African-Arabian mammals has been further hindered by the lack of a precise temporal framework for these sites. We conducted magnetostratigraphic analyses, associated with biostratigraphic studies, in the fossiliferous sequences exposed in the northwestern Hammadas of the Saharan Platform in the Glib Zegdou area and in the Saharan Atlas at the El Kohol locality (Algeria) to further define the age of these Eocene continental deposits. Based on biostratigraphic constraints, the six polarity zones identified in the El Kohol section can be correlated with chrons C24n to C22r, providing the first direct age estimates for the El Kohol fossiliferous strata between 52 and 51 Ma. Correlation to the geomagnetic polarity time scale, using previously published biostratigraphic data for the Glib Zegdou fauna, suggests an age ranging between 49 and 45 Ma for this section. The high-resolution magnetostratigraphic study of the poorly known continental Eocene Epoch of Algeria provides new insights into the early Tertiary stratigraphy of northwest Africa. The placement of the Algerian localities into a consistent chronological framework constitutes considerable advancement to achieve biostratigraphic correlation of the Paleogene African-Arabian mammal localities.
    Print ISSN: 0016-7606
    Electronic ISSN: 1943-2674
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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    PAPER CURRENT
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