I heard that there have been rift zones that have become inactive, and then became active again in geological past. I heard that there have been rift zones that have become inactive, and then became active again in geological past. Laura Rhoton Dear Laura, Good question.
Rifts are weak areas in the crust and plates.
At some later time, if the tectonics change again, the old rift may become reactivated since it is weaker than other areas on the plate. No good examples come to mind.