Sierra Barrosa Formation, Geological formation in Neuquén Province, Argentina.
The Sierra Barrosa Formation is a geological layering in Neuquén Province made up of fine to medium sandstone about 62 meters thick. Within these layers are thin sections of mudstone arranged throughout the deposit, creating a varied sequence of rock types.
It originated during the Cretaceous period, specifically in the middle to late Coniacian age, when sediments were deposited in an ancient sea or river setting. These layers preserved extensive fossil remains of dinosaurs and other prehistoric animals from that time.
Scientists from around the world come here to study the rich fossil deposits found in the layers. It has become an international research hub where researchers work together to understand prehistoric South American life better.
The site can be reached from the nearby town of Plaza Huincul situated to the southwest, making it accessible for research visits and geological study. Visitors should prepare for outdoor conditions and check local information about which areas are open to explore.
This location has yielded previously unknown dinosaur species including Murusraptor barrosaensis, Kaijutitan maui, and Mendozasaurus neguyelap. These discoveries have greatly expanded scientific knowledge about the diversity of life in the Cretaceous period.
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