Category:Precambrian formations in Pennsylvania
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| Preceded by Proterozoic Eon | Phanerozoic Eon | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Paleozoic Era | Mesozoic Era | Cenozoic Era | ||||||||||
| Cambrian | Ordovician | Silurian | Devonian | Carboniferous | Permian | Triassic | Jurassic | Cretaceous | Paleogene | Neogene | 4ry | |
| Hadean | Archean | Proterozoic | ||||||
|---|---|---|---|---|---|---|---|---|
| Eoarchean | Paleoarchean | Mesoarchean | Neoarchean | Paleoproterozoic | Mesoproterozoic | Neoproterozoic | ||
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