Early Ordovician (1 gen 486850000 anni a. C. – 1 gen 471300000 anni a. C.)

Descrizione:

The Early Ordovician is the first epoch of the Ordovician period, corresponding to the Lower Ordovician series of the Ordovician system. It began after the Age 10 of the Furongian epoch of the Cambrian and lasted from 486.85 to 471.3 million years ago, until the Dapingian age of the Middle Ordovician. It includes Tremadocian and Floian ages.

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