History of Brazil's Geography

Back in Time 

Brazil is entirely on the South American Platform- a portion of the South American plate that is continental. Evidence suggests the South American Plate broke from Pangea- the super-continent formed approximately 300 million years ago. The Nazca plate has been converging with the South American plate for the past 70 million years. This convergence partially led to the formation of the Andes- a massive mountain range in Brazil. Brazil became solid on the South American plate sometime in the Paleozoic period- the oldest era of the Proterozoic period.

The dark red section is Brazil which rests on the South American Plate 

Sources

http://www.brcactaceae.org/geology.html

https://www.britannica.com/science/Proterozoic-Eon

http://americastectonics.weebly.com/south-american-plate.html