Chilcatay Formation
| Chilcatay Formation | |
|---|---|
| Stratigraphic range: Early Miocene (Burdigalian) ~ | |
| Type | Geological formation |
| Unit of | Pisco Basin |
| Underlies | Pisco Formation |
| Overlies | Otuma Formation |
| Lithology | |
| Primary | Sandstone, siltstone |
| Location | |
| Country | Peru |
The Chilcatay Formation is a geologic formation located in Peru. The formation was deposited in the Pisco Basin, during the Early Miocene, roughly from 19.2 to 18.0 Ma. Fossil remains of baleen whales, sharks, and rays have been found in the formation.