Question

describe the formation Block mountains and rift valleys ​

Answer 1

Answer:

Rift valleys are thought to have been developed either from the action of tensional forces in the crust or from the action of compressional forces. ... Many feel that the rift valley (graben) is the part that moves, due to the force of gravity. The block mountain (horst) is left standing higher above the sunken graben.

Answer 2

Answer:

Block Mountains are formed when two tectonic plates move away from each other causing cracks on the surface of the Earth. When parallel cracks or faults occur, the strip of land or the block of land between them may be raised resulting in the formation of block mountains.