👉 Rifts are gaps or depressions in a mountain range, usually defined by their elevation and shape. They occur when two mountains rise from each other at different elevations, creating a gap between them. The process of forming a rift is called subduction, where one oceanic plate subducts beneath another, causing the oceanic crust to shift and deepen. Rifts are often associated with earthquakes and volcanic activity as they can trigger landslides and tsunamis.