Chacarilla Formation
| Chacarilla Formation | |
|---|---|
| Stratigraphic range: Oxfordian-Aptian ~ | |
| Type | Geological formation |
| Underlies | Cerro Empexa Formation |
| Overlies | not exposed |
| Thickness | min. 1,100 m (3,600 ft) |
| Lithology | |
| Primary | Sandstone, shale |
| Location | |
| Coordinates | 20°36′S 69°06′W / 20.6°S 69.1°W |
| Approximate paleocoordinates | 21°30′S 36°06′W / 21.5°S 36.1°W |
| Region | Tarapacá Region |
| Country | Chile |
| Extent | Tarapacá Basin |
| Type section | |
| Named for | Quebrada de Chacarilla |
The Chacarilla Formation (Spanish: Formación Chacarilla) is an Oxfordian to Early Cretaceous geologic formation of the Tarapacá Basin in northern Chile, close to the border with Bolivia. The marine and fluvial formation preserves several dinosaur trackways and has been declared a Natural Sanctuary (Spanish: Santuario de la Naturaleza) in 2004.