Question

With the aid of labeled diagram, describe how fold mountains are formed.

Answer 1

1. Extensive shallow depression called geosynline develop on the earth’s surface.
2. Prolong and extensive erosion occurs in the surrounding higher grounds.
3. Sediments are deposited in the geosynclines forming thick layers.
4. The weight of the sediments cause subsidence of the geosyncline leading o accumulation of more sediments to greater thickness.
5. Further subsidence of the geosynclines triggers off compressional forces which cause the sediments to fold.
6. The folded layers of sediments in the geosynclines are thrust upwards to form fold mountains along the edges of the geosynclines due to closeness of the source of the forces.