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a craton, a section of stable continental crust by the end of the Trans-amazonian orogeny 1.8 billion years ago. The Borborema Province is beneath areas in the northeast, with Paleoproterozoic craton basement rock originally assembled around even older Archean rocks. It includes three zones. The Zona Transversal is in the central sub-province between the Pernambuco Shear Zone and the São Francisco Craton, displaying 2.2 billion year old gneiss,

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