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nounfrom 544 million to about 230 million years ago
Similar:
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Parts of paleozoic
- "cambrian period"
- "carboniferous"
- "carboniferous period"
- "devonian"
- "devonian period"
- "ordovician"
- "ordovician period"
- "permian"
- "permian period"
- "silurian"
- "age of fishes"
- "silurian period"
- "cambrian"