Anisian Stage

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 It might be outdated or ideologically biased.

Anisian Stage

 

(from Anisus, Latin name of the Ens River in the Dinarian Alps), the lowest stratum of the middle formation of the Triassic system. It was classified by the Austrian geologists W. Waagen and C. Diener in 1895. The Anisian stage is typically composed of limestone with ceratites and ammonites (Ceratites trinodosus, Sturia, Ptychites). Deposits of the Anisian stage are widely distributed in the Alps, the Himalayas, the Caucasus, the northeastern USSR, and North America.

B. M. KELLER

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
This major hiatus is attributed to part of the early Anisian stage by Lopez-Gomez and Arche (1994).