What are the differences between fold mountains and block mountains?
Fold mountain Fold mountains are mountains formed due mainly to the effects of folding on layers within the upper part of the Earth’s crust. In the time before either Plate tectonic theory developed, or the internal architecture of thrust belts became well understood, the term was used for most mountain belts, such as the Himalayas. The term is still prevalent in physical geography literature but has otherwise generally fallen out of use except as described below.The forces responsible for formation of the fold mountains are called Orogenic movements.The term “orogenic” is derived from a greek word meaning mountain building. These forces act at tangent to the surface of the earth and are primarily involved in plate tectonics.Fold mountains are generally formed in the less-deformed areas peripheral to areas strongly affected by thrust tectonics. Typically they are found in the foreland region where a major mechanically weak decollement horizon is present. The frontal thrust (or thrusts)
