User:Magnatyrannus/Koluel Kaike Formation

The Koluel Kaike Formation is a geological formation in Chubut Province, Argentina which spans around 50 to 47.1 million years ago from the Early to Middle Eocene.It predominantly consists of pyroclastic deposits, which were deposited in a semi-arid environment. It is divided up into a number of members. The diverse fauna of the Sarmiento Formation, including a variety of freshwater fish, crocodilians, turtles and snakes, also includes many mammals such as South American native ungulates (notoungulates, litopterns, astrapotheres) as well as armadillos, and caviomorph rodents.

Stratigraphy
The Sarmiento Formation overlies the Casamayor Formation and forms the most recent sequence of the stratigraphic section. The formation is named for the town of Sarmiento