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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.
- Auteur
- Animals of the Past
By Frederic A. Lucas
Published in 1901
Available from gutenberg.org - Ajoutée le
- Mercredi 25 Novembre 2020
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