Itaboraian
The Itaboraian age is a period within the Early Eocene geologic time epoch of the Paleogene, used more specifically with South American land mammal ages. It follows the Riochican and precedes the Casamayoran age.
Etymology
This age is named after the Itaboraí Formation in the Itaboraí Basin in Itaboraí, a Greater Rio municipality in the state of Rio de Janeiro in Brazil not very far away from Niterói.Formations
| Formation bold is type | Country | Basin | Notes |
| Itaboraí Formation | Itaboraí Basin | ||
| Bogotá Formation | Altiplano Cundiboyacense | ||
| Cerrejón Formation | Cesar-Ranchería Basin | ||
| Chota Formation | Bagua Basin | ||
| Koluel Kaike Formation | Golfo San Jorge Basin | ||
| Las Flores Formation | Golfo San Jorge Basin | ||
| Maíz Gordo Formation | Salta Basin | ||
| Mealla Formation | Salta Basin | ||
| Mogollón Formation | Talara & Tumbes Basins | ||
| Muñani Formation | Altiplano Basin | ||
| Peñas Coloradas Formation | Golfo San Jorge Basin | ||
| Río Loro Formation | Sierras Pampeanas |