Block mountains represent the upstanding parts of the ground between two faults or on either side of a rift valley or a graben. Block Mountains are formed as a result of faulting caused by tensile and compressive forces motored by endogenetic forces.
The uplifted blocks are termed as horsts, and the lowered blocks are called graben.
The Great African Rift Valley (valley floor is graben), The Rhine Valley (graben) and the Vosges mountain (horst) in Europe are examples.
