Chasicoan
The Chasicoan age is a period of geologic time from 10–9 Ma within the Late Miocene epoch of the Neogene, used more specifically within the SALMA classification in South America. It follows the Mayoan and precedes the Huayquerian age.
Etymology
The Chasicoan is named after the Arroyo Chasicó Formation of the Colorado Basin in northeastern Argentina.Formations
| Formation bold is type | Country | Basin | Notes |
| Arroyo Chasicó Formation | Colorado Basin | ||
| Bahía Inglesa Formation | Caldera Basin | ||
| Caujarao Formation | Falcón Basin | ||
| Cerro Azul Formation | Colorado Basin | ||
| Coquimbo Formation | Tongoy Bay | ||
| Loma de Las Tapias Formation | Tulum Valley | ||
| Madre de Dios Formation | Madre de Dios Basin | ||
| Mauri Formation | Altiplano Basin | ||
| Navidad Formation | Chilean Coast Range | ||
| Puerto Madryn Formation | Valdés Basin | ||
| Paraná Formation | Paraná Basin | ||
| Pebas Formation | Amazon Basin | ||
| Pisco Formation | Pisco Basin | ||
| Urumaco Formation | Falcón Basin |