The Mata Amarilla Formation is a fossiliferous formation of the Austral Basin in southern Patagonia, Argentina.
The formation consists of sediments deposited during the Middle Cenomanian, dated to 96.94 to 95.52 Ma.
The middle section of the formation was previously considered to be the Pari Aike Formation.

The Mata Amarilla Formation has provided many fossil vertebrates, among which dinosaurs, fish and turtles, as well as fossil insects, flora and molluscs.
The Mata Amarilla Formation is a fossiliferous formation of the Austral Basin in southern Patagonia, Argentina. The formation consists of sediments deposited during the Middle Cenomanian, dated to 96.94 to 95.52 Ma. The middle section of the formation was previously considered to be the Pari Aike Formation.
The Mata Amarilla Formation has provided many fossil vertebrates, among which dinosaurs, fish and turtles, as well as fossil insects, flora and molluscs.
Mata Amarilla Formation