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A rift valley can form by tectonic plates moving apart. They are formed between mountions and a a geologic rift.
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A rift valley can form by tectonic plates moving apart. They are formed between mountions and a a geologic rift.
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A rift valley can form when a chunk of the earths crust is moved downward between two parallel faults. In other words, when the crust is expanded or spreads.