Jama Formation
The Jama Formation is a Pliocene to Early Pleistocene geological formation in Ecuador. The claystones and sandstones were deposited in a coastal environment. The age of the Jama Formation is constrained by 40Ar/39Ar dating of tephra beds. The formation is correlated to the Charco Azul Formation of western Panama and southeastern Costa Rica.
Subdivision
The formation is subdivided in, from top to base:- El Matal Member
- Punta Ballena Member
- Punta Pasa Borracho Member
Fossil content