Caleta Herradura Formation (Spanish: Formación Caleta Herradura) is a geologic formation of Late Miocene (Montehermosan) 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.

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.

• Cerro Ballena
• Coquimbo Formation
• Navidad Formation
• Pisco Formation

• S. D. Emslie and C. G. Correa. 2003. A new species of penguin (Spheniscidae: Spheniscus) and other birds from the late Pliocene of Chile. Proceedings of the Biological Society of Washington 116(2):308-316