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n. - From 425 million to 405 million years ago.

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Usage examples (31)
  • The term Silurian was employed by Barrande, after Murchison, in a more comprehensive sense than was justified by subsequent knowledge.
  • They're also in a fairway for a deeper zone called the Silurian, where a number of other companies have had huge success.
  • On the Cambrian rocks rest the formations known as Silurian, from the fact that they were first thoroughly examined in South Wales
  • You have in that first stage what the geologists call the Silurian Age, the age of fishes, when the great divine manifestation was of all these forms of life.
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