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Thick marine sedimentary and volcanic sequences accumulated in northern Venezuela and Trinidad during ?Late Jurassic and Cretaceous time. By latest Cretaceous time, the northern part of this sequence had been regionally metamorphosed and rapidly uplifted. Flysch troughs developed to the south which received exotic masses and turbidite sands until early Eocene time. These events are interpreted as resulting from southward movement of the Caribbean crust and its subduction into a south-dipping Benioff zone located north of Venezuela. This postulated Benioff zone is believed to have become inactive in latest Cretaceous time, and the resulting isostatic rebound apparently caused overthrusting which...

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