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Ordovician

3:15

Welcome to the Ordovician

1:36

The Evolution of Life part 3 : Ordovician

2:09

Ordovician Period Game Environment update

2:51

The Great Ordovician Biodiversification Event

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Ordovician Reef Ecosystems

The Ordovician is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.2 million years from the end of the Cambrian Period 485.4 million years ago (Mya) to the start of the Silurian Period 443.8 Mya.
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