South Precambrian platform

Cenozoic tectonics and orogenies
Basically everything east of the Andes and south of the Caribbean
Consists of Archean and older Proterozoic nuclei surrounded by younger Proterozoic orogenic belts
Exposed in 4 places:
Guyana Shield
Guaporé Shield
Sao Francisco Craton
Rio de la Plata Craton

Guiana- and parts of Venezuela, Columbia and Brazil.
Archean: three comparatively small Archean nuclei-
The tectonically overthrust Imataca Complex in the north
The poorly defined Pakairama Craton in the centre – west
The Xingu Craton(northern segment) in the southeast
Early Proterozoic: rocks consisting of the metavolcanic Pastora Supergroup and the granitic plutonic Supamo Complex. (2.2-1.8Ga)
Mind Proterozoic: rocks consists of continental clastic sedimentary rocks. These Precambrian sediments include quartz sandstones, quartzites, and conglomerates presumed (1.7-1.4Ga).

strata of plateau-basalts and interplanetary intrusions of the main composition and other breeds of the formation of the Jurassic-Cretaceous formation were discovered. This formation is especially developed in the Paraná Basin, where the Serra-Gerral series depth to 1.8 km