Ulrich Grubenmann

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Grubenmann, Ulrich


Born Apr. 15, 1850, in Trogen; died Mar. 16, 1924, in Zürich. Swiss mineralogist and pe-trologist. Professor at the University of Zürich.

Grubenmann advanced the hypothesis of the threefold division of the earth’s crust into depth zones distinguished by the nature of the metamorphic processes: the kata, meso, and epi zones. These terms have been retained to the present but are used to designate not so much the depths of rock occurrence as the grades of metamorphism.


Die kristallinen Schiefer, 2nd ed., parts 1–2. Berne, 1910.
In Russian translation:
Metamorfizm gornykh porod: Obshchaia chast’. Leningrad-Moscow, 1933. (With P. Niggli.)
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.