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The very rocks themselves may consist largely of fossils; chalk, for example, is mainly made up of the disintegrated shells of simple marine animals called foraminifers, and the beautiful flint-like "skeletons" of other small creatures termed radiolarians, minute as they are, have contributed extensively to the formation of some strata.

Author

Animals of the Past
By Frederic A. Lucas
Published in 1901
Available from gutenberg.org

Posted on

Wednesday 25 November 2020

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• Prehistoric

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