Bajo Barreal Formation, Geological formation in Chubut Province, Argentina.
The Bajo Barreal Formation is a geological layer in Chubut Province made of sandstone, claystone, and mudstone deposits that reveal ancient river environments. These layers date from the Late Cretaceous period and spread across remote areas of the province.
Scientists first documented this formation in 1963, establishing its importance as a key structure in the Golfo San Jorge Basin. The layers were deposited roughly 90 to 70 million years ago and have shaped understanding of Cretaceous South America since then.
Research teams have worked here to study ancient river and lake environments from millions of years ago, revealing how the land and life looked in prehistoric South America. The discoveries made by these scientists shape our understanding of the region's distant past.
This formation is located in remote areas of the province and is accessible for fossil work only with specialized vehicles. Visitors should prepare for harsh conditions and seek professional guidance when exploring the site.
Paleontologists have found dinosaur remains here, including two species found nowhere else in the world. These discoveries show that the Southern Hemisphere was home to its own distinct world of extinct animals.
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