Brazil Tours / Geology - Gondwana (600 - 500 Ma) was a
Neoproterozoic
supercontinent, which was formed by the fusion of fragments of
Rodinia / Pannotia,
the prior supercontinent
(see also Proterozoic).
When you travel through SoutheastBrazil, you will easily
recognize remnants of Gondwana in form of countless gneiss - granitic intrusive rocks which outcrop
all along the coastal Serra do Mar mountain chain.