Mountain Formation. 1. Mountain Formation. The process of tectonic mountain building is called orogenesis . Mountains are formed by tectonic forces called stress. 2. Types of stress. Tensional – pulling apart Compressional – pushing together
b. Fold Belt Mountains - caused by compressional stresses
c. Upwarped Mountains – caused by a broad arching of the crust. Usually caused by a magmatic intrusion lifting the crust.
d. Volcanic Mountains – formed by repeated volcanic eruptions