A mountain of lithosphere plate motion, either orogenic movement or epeirogenic movement. Squeezing force, isostatic uplift and invasion of igneous rock material strength, created an upward than the surrounding terrain characteristics of overburden rock. High properties make it a hill, or if the higher, more steeply, mountain. According to the characteristics of absolute height difference region called the hills of the terrain. The main ranges usually occurs in linear arc, indicating plate boundary and activities. Two types of rock formation depends on the strength of the structural response of mountains or fold mountain.
In the mainland collision force may cause compression area, thus forced up surface. Balance of the surface of the earth, most of the weight of compressed rock forced down, production “mountain deep roots” (see “to” books, news and Siever page. 413]. Mountain so form and up and down (see isostasy). However, in some part of the African continent collision is probably just in order to overthrow the others, crumpling part.