Riochican
The Riochican age is a period of geologic time (57.0—54.0 Ma) within the Paleocene epoch of the Paleogene used more specifically with South American Land Mammal Ages.
It follows the Itaboraian and precedes the Casamayoran age.[1]
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| Preceded by Proterozoic Eon | Phanerozoic Eon | |||||||||||
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| Paleozoic Era | Mesozoic Era | Cenozoic Era | ||||||||||
| Cambrian | Ordovician | Silurian | Devonian | Carboniferous | Permian | Triassic | Jurassic | Cretaceous | Paleogene | Neogene | 4ry | |
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