La Colonia Formation

La Colonia Formation is a geological layer in Chubut Province composed of sandstone, shale, and mudstone that reaches up to 240 meters thick in some areas. The rock strata spread across the region and contain abundant fossil remains from the Late Cretaceous period.

Geologists first documented this formation during surveys in the 1950s and discovered numerous Late Cretaceous fossil remains. Since then, it has become a recognized site for paleontological research and scientific discoveries.

Paleontologists from around the world come here to study Late Cretaceous fossils, including dinosaurs, turtles, and ancient plants. The location has become an important meeting point for international research teams working together to understand prehistoric Patagonia.

The site requires official permits and coordination with local authorities for scientific research and excavation work. Visitors should inquire ahead and follow the necessary procedures with the responsible agencies.

More than 300 mammal skeletons have been preserved here alongside remains of the meat-eater Carnotaurus sastrei. This unusual combination offers insights into species distribution and the ecosystem of that era.