Question

At what boundary do Rift valleys form

Answer 1

Rift valleys form at divergent plate boundaries — where tectonic plates are moving apart. Stretching and tensional forces cause the crust to fracture along normal faults and the central block drops down, creating a linear valley. Examples: the East African Rift (continental rifting) and rift valleys along mid‑ocean ridges like the Mid‑Atlantic Ridge. If rifting continues, it can evolve into a new ocean basin.