Campos Basin is one of 12 coastal sedimentary basins of Brazil. It spans both on-shore and off-shore parts and is located near Rio de Janeiro. The basin originated in Neocomian stage of the Cretaceous period 145–130 million years ago during the breakup of Gondwana. It has a total area of about 115,000 square kilometers whereas the on-shore portion is small at only 500 square kilometers.
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