Lena Stage

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 It might be outdated or ideologically biased.

Lena Stage

 

second lowest stage of the Cambrian system. It was identified by the Soviet geologists N. P. Suvorova and G. F. Gurari in 1954. The Lena stage is characterized by a complex of trilobites of the Protolenidae family, Archaeocyatha, chiolites, and brachiopods. It is found in Eastern Siberia, where it is chiefly represented by carbonaceous marine sediments (Lena limestone). Formations similar to the Lena stage are found abroad in Asia, Europe, Australia, North Africa, and North America.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.