Fault-block landforms are formed when large areas of bedrock are widely broken up by faults creating large vertical displacements of continental crust.

Vertical motion of the resulting blocks, sometimes accompanied by tilting, can then lead to high escarpment

Escarpment

An escarpment is a steep slope or long cliff that occurs from erosion or faulting and separates two relatively level areas of differing elevations.-Description and variants:...

s. These mountains are formed by the Earth's crust being stretched and extended by tensional forces. Fault block mountains commonly accompany rift

Rift

In geology, a rift or chasm is a place where the Earth's crust and lithosphere are being pulled apart and is an example of extensional tectonics....

ing, another indicator of tensional tectonic forces.

The uplifted blocks are called block mountains or horsts.