Aridal Formation
| Aridal Formation | |
|---|---|
| Stratigraphic range: Middle Eocene, Lutetian–Priabonian | |
| Type | Geological formation |
| Lithology | |
| Other | sandstone, marl |
| Location | |
| Country | Morocco |
The Aridal Formation in the Sahara Desert of southwestern Morocco is a fossil formation with rocks dating to the Lutetian - Priabonian (47.8 - 33.9 million years ago), preserving a middle Eocene shallow coastal environment.
The formation represents the world's richest Bartonian archaic whale assemblage, including protocetids and basilosaurids.