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How are valleys formed by plate tectonics?

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Tectonic forces create valleys. Tectonic forces create rift valleys on the continents when a crustal plate is pulled from two different directions and the crust thins. Parallel faults are created as the crusts is pulled apart and a central section drops downward forming a graben. read more

African rift valleys were formed by the separation of tectonic plates. Water flows down to the valley floors, creating rivers and lakes. read more

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