Die Entstehung der Kontinente, der Vulkane und Gebirge Die geologischen Grundlagen der Abstammungslehre

Abstract

THESE two books have little in common except that they are both German speculative discussions of geological principles. Herr P. O. Köhler's pamphlet on the origin of continents, volcanoes, and mountains is a contribution to dynamical geology, in which he rejects some of the most generally accepted facts in geological morphology, and opposes especially some of the main conclusions of Prof. Suess. The author denies the existence of “Senkungsfelder,” or foundered blocks of the earth's crust, and he declares that raised earth blocks—the Schollen of Suess—are statically impossible. Herr Köhler regards plutonic and volcanic intrusions as closely allied, and attaches great weight to the extent of plutonic activity; he describes the views of those whom he calls the “passive plutonists” as erroneous in all important respects, and he traces their errors to two chief fallacies—the secular cooling of the earth and its higher internal temperature.

Die Entstehung der Kontinente, der Vulkane und Gebirge.

By P. O. Köhler. Pp. vi+58; 2 figures. (Leipzig: W. Engelmann, 1908.) Price 1.60 marks.

Die geologischen Grundlagen der Abstammungslehre.

By G. Steinmann. Pp. ix+284; 172 figures. (Leipzig: W. Engelmann, 1908.) Price 7 marks.