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Definition

Posted by robmutch on 31 Dec 2010 at 18:56 GMT

Devonian
http://plosone.org/article/info:doi/10.1371/journal.pone.0015584#article1.front1.article-meta1.abstract1.p1

geologic period and system of the Paleozoic Era from 416 to 359.2 million years ago -- Wikipedia: http://en.wikipedia.org/wiki/Devonian

No competing interests declared.