Friasian
The Friasian age is a period of geologic time within the Early Miocene epoch of the Neogene, used more specifically within the SALMA classification of South America. It follows the Santacrucian and precedes the Colloncuran age.
Etymology
The age is named after the Río Frías Formation in the Aysén Basin, Patagonia, Chile.Formations
| Formation bold is type | Country | Basin | Notes |
| Río Frías Formation | Aysén Basin | ||
| Castilletes Formation | Cocinetas Basin | ||
| Chilcatay Formation | Pisco Basin | ||
| Cura-Mallín Group | Cura-Mallín Basin | ||
| Gran Bajo del Gualicho Formation | Colorado Basin | ||
| Parángula Formation | Barinas-Apure Basin | ||
| Pebas Formation | Amazon Basin | ||
| Río Foyel Formation | Patagonian Andes | ||
| Río Yuca Formation | Barinas-Apure Basin |