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Faulting occurs when there are two tectonic plates that meet at a divergent boundary. This means that they move away from each other. The general reason of why plates move is because of a gently rolling mantle. The rock in the mantle is just liquid to flow like taffy. This extremely slow movement, also slowly moves the tectonic plates. Once again, at divergent plate boundaries the plates move away from each other. Without a sudden movement of the plates (such as an earthquake) this process will only enlarge the fault cm a year.

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7y ago

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