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Ordovician |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.07 sec. |
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Ordovician of, denoting, or formed in the second period of the Palaeozoic era, between the Cambrian and Silurian periods, which lasted for 45 000 000 years during which marine invertebrates flourished How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| This fauna occurs with brachiopods and other elements, which have been described by a number of distinguished palaeontologists: the Ordovician and Silurian of Anticosti Island is famous for its fossils and quality of preservation--a good thing that it is a protected area as otherwise naturally weathered slabs would soon vanish. 65 Mesozoic Createous Jurassic Triassic 248 Paleozoic Permian Carboniferous Devonian Silurian Ordovician Cambrian 543 Late Ediacaran NEWCOMER: Proterozoic Cryogenian The new period stretches from 600 to 544 million years ago. Published to accompany a television series of the same title that will be aired this month on The Discovery Channel, this lively, visual book recreates life in the ancient oceans from the Ordovician to the Pliocene. |
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