Paleotypal Rock

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 It might be outdated or ideologically biased.

Paleotypal Rock

 

an igneous rock that because of extreme decomposition appears ancient, regardless of age. Paleo-typal rocks are opposed to cenotypal rocks, which appear fresh.

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