Cabeza_Blanca

Sarmiento Formation

Sarmiento Formation

Geologic formation in Chubut Province, Argentina

The Sarmiento Formation (Spanish: Formación Sarmiento), in older literature described as the Casamayor Formation, is a geological formation in Chubut Province, Argentina, in central Patagonia, which spans around 30 million years from the mid-Eocene to the early Miocene. It predominantly consists of pyroclastic deposits,[1] which were deposited in a semi-arid environment.[2] It is divided up into a number of members.[1] The diverse fauna of the Sarmiento Formation, including a variety of birds, crocodilians, turtles and snakes, also includes many mammals such as South American native ungulates (notoungulates, litopterns, astrapotheres) as well as armadillos, and caviomorph rodents.[3]

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Paleofauna

Amphibians

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Birds

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Reptiles

Crocodylomorphs

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Lepidosaurs

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Testudines

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Mammals

Meridiolestidans

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Meridiungulates

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Xenarthrans

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Metatherians

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Rodents

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Primates

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Bats

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References

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