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Which Ordovician stages belong to the Middle Ordovician Epoch?
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Ordovician Period
The distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the Ordovician Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The Middle Ordovician Epoch, which spanned from 470 million to 458.4 million years ago, consists of two stages:12
- Dapingian Stage (Stage 3)
- Darriwilian Stage (Stage 4)12