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Late Miocene Marine and Non-marine Time Scale in Europe
Argon isotope dating on the island of Samos contributes to the reconciliation of continental and marine time scales in the Mediterranean basin; the...
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Foraminiferology
Manual of Planktonic Foraminifera
. By J. A. Postuma. Pp. 420. (Elsevier: Amsterdam, London and New York, 1971.) $26.50.
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Abnormal Diurnal Variation of Total Ionization
IT has long been known that magnetic storms may be associated with major changes in the F 2 region of the ionosphere. Recently interest has been...
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Nitrogen Relations of Plants
Nitrogen Metabolism in Plants
By H. S. McKee. Pp. 728. (Oxford and London: Clarendon Press: Oxford University Press, 1962.) £5 5 s .
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Geological Age of Gaudryina tailleuri in Northern Alaska
FOR several years, in publications dealing with Alaskan biostratigraphy, an Early Albian age has been attributed to the Gaudryina tailleuri faunal...