Caleta Herradura Formation
Caleta Herradura Formation is a geologic formation of Late Miocene age, cropping out on the Mejillones Peninsula in northern Chile. The erosion at the Coastal Cliff of northern Chile have created particularly good exposures of Caleta Herradura Formation. The formation deposited in a half graben within Mejillones Peninsula. The formation rests nonconformably on the Jorgino Formation.
Fossil content
The following fossils have been found in the formation:| Group | Fossils | Notes |
| Mammals | Balaenopteridae indet., Odontoceti indet., Otariidae indet. | |
| Birds | Spheniscus chilensis, Milvago sp., Phalacrocorax sp. | |
| Fish | Carcharodon carcharias, Carcharias sp., Carcharhinus sp., Chondrichthyes indet., Myliobatidae indet. |