Geofísica

Previous compilation of crustal structure in South America had large unsampled areas in the middle part of the continent, as the long belt of thin crust in the Sub-Andean lowlands that was mainly estimated indirectly by gravity data and the Amazon Craton that was sparsely sampled by seismic stations. A temporary deployment of 35 seismic stations in southwest Brazil and parts of Bolivia, Paraguay, Argentina and Uruguay filled a significant gap in crustal information in the stable platform.

Despite representing one of the largest cratons on Earth, the early geological evolution of the Amazonia Craton remains poorly known due to relatively poor exposure and because younger metamorphic and tectonic events