Silurian period

  1. from 425 million to 405 million years ago; first air-breathing animals
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How To Use Silurian period In A Sentence

  • But whenever I read it it calls forth for me an image that surely was nothing at all like what Eliot had in mind: that silent sea is, for me, the paleozoic one of the Cambrian or Silurian period of four hundred million years ago, and the owner of that pair of ragged claws is the curious mud-crawling creature known as a _eurypterid, _ a vaguely lobsterish thing that reached lengths of eight feet and more. Asimov's Science Fiction
  • But as the ecosystem recovered after the freeze, it expanded, with land plants becoming common over the course of the Silurian period.
  • This was accompanied by the multistage emplacement of large intrusive bodies in the Cambrian, Ordovician, and Silurian periods.
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