Geology

Abstract

THE third volume of the “Textbook of Geology”, by Prof. Schaffer, Director of the Geological and Palseontological Department of the Vienna Museum, is devoted to regional geology. The first part includes the general introduction, illustrated by a map of the world showing the author's conclusions as to the distribution and character of the main earth-forms. He divides them into three main groups; the Epeirogens are the continental areas; the Orogens are the mountain bands, in which he includes all the North Atlantic, the western part of the Southern Ocean, and the south-western part of the Pacific. His third group includes the Pelagogens, or the areas of the Pacific, South Atlantic, and Indian Ocean which he regards as having been permanent. All the eastern Pacific, he considers, has been an ocean since the pre-Cambrian, and he supports this view by the opinion of Holdhaus that the insect faunas of the Polynesian islands are oceanic—a conclusion rejected by other authorities on the entomology of that region.

Lehrbuch der Geologie.

Teil 3: Geologische Länder-kunde. (Regionale Geologie). Von Prof. Dr. F. X. Schaffer. Lieferung Pp. vii + 96. (Leipzig und Wien: Franz Deuticke, 1930.) 6 gold marks.