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Temporal Coverage
- Quaternary23
- From 2 million years ago16
- Devonian7
- Paleozoic6
- Cretaceous5
- From 65 to 140 million years ago5
- Precambrian5
- Tertiary5
- From 230 to 570 million years ago4
- Ordovician4
- From 2 to 65 million years ago3
- From 345 to 405 million years ago3
- Jurassic3
- Mississippian3
- Cambrian2
- Carboniferous2
- Cenozoic2
- From 10 to 25 million years ago2
- From 65 million years ago2
- Holocene2
