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Silurian

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The Silurian is a geologic period and system that extends from the end of the Ordovician period, about 443.7 ± 1.5 Ma (million years ago), to the beginning of the Devonian period, about 416.0 ± 2.8 Mya. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by several million years. The base of the Silurian is set at a major extinction event when 60% of marine species were wiped out. See Ordovician-Silurian extinction events.

Silurian period
444-416
Llandovery
444-428
Wenlock
428-423
Ludlow
423-419
Pridoli
419-416
Rhuddanian
444-439
Aeronian
439-436
Telychian
436-428
Sheinwoodian
428-426
Homerian
426-423
Gorstian
423-421
Ludfordian
421-419

Mantell's Iguanodon restoration

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