Brazil Eco Adventure Tours
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During the Paleozoic, Gondwana merged with Laurasia, forming supercontinent Pangea. In this era, when the sea level was about 300 to 400 m higher than today, the syneclises (intercratonic sedimentary basins) of the Neoproterozoic South American Platform were flooded by the sea (marine transgressions).

Evidences of these floodings are for example the Devonian (400 Ma) layers of the Ponta Grossa formation (Paraná supersequence) at Chapada dos Guimarães National Park ( (Paraná Basin / Mato Grosso).

During Permian (300 - 251 Ma), Somun Cura and Deseado, two mayor landmasses that nowadays constitute the mayor part of the Patagonian Platform were added to the South American Platform.