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Geology of Brazil

Archean (3,8 - 2,5 Ga)

Mountain Bike Tours / Brazil – During the Archean Eon, molten material from the Earth's mantle was erupted by volcanoes and the first (micro) continents are supposed to have emerged out of a Hadean primeval ocean.

3 Ga Ur might have been the first assembly of these proto - continents followed by Arctica (2,5 Ga), Atlantica and Nena (1,8 Ga) during the Proterozoic.

Fragments of Archean continents can nowadays be found all over the world, among others in Brazil, for instance in form of the Amazon or São Francisco craton – Geotravel & tours / Brazil.

See also: Tour Porto Seguro - Salvador