Presidente Prudente Formation, Geological formation in São Paulo, Brazil.
Presidente Prudente Formation is a geological layer in São Paulo made of sandstone and mudstone from the Cretaceous period, part of the larger Bauru Group in the Paraná Basin. These sediments preserve the remains of animals that lived in this region millions of years ago.
This layer formed roughly 80 to 70 million years ago when shallow lakes and river landscapes covered this part of South America. The deposits record a critical time in how dinosaurs and other animals evolved on the continent.
Scientists worldwide study this formation to understand how dinosaurs, crocodiles, and turtles evolved in South America during ancient times. The fossils found here help researchers piece together what life looked like in this prehistoric ecosystem.
Access to the formation occurs through specialized excavation sites where researchers work under specific conditions. Visitors should know that this is an active research area and accessibility may vary depending on ongoing scientific work.
The formation was home to Austroposeidon magnificus, one of the largest dinosaurs ever found in Brazil. This giant creature got its name from a sea god and shows just how massive the animals living here once were.
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