Plottier Formation, Geological formation in Neuquén Province, Argentina.
The Plottier Formation is a sedimentary sequence in Neuquén Province composed of claystone and sandstone deposits. These layers spread across the Patagonian landscape and reveal different phases of deposition from river environments.
This formation developed during the Late Cretaceous through gradual sediment accumulation in a river system. That time span documents major environmental changes and shifting river patterns in ancient South America.
Scientists study the formation's fossil records, which include remains of titanosaurs, pterosaurs, and crocodiles, expanding knowledge of prehistoric life in South America.
The formation can be studied through an exposure near Neuquén City airport, north of Plottier town. This area displays the various rock layers and is accessible with basic preparation.
The formation contains eleven different rock types that reflect three separate river systems, showing how river patterns and climate shifted over time. This variety makes it valuable for understanding climate changes during the Cretaceous.
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