Question

Describe how an overthrust fold is formed.

Answer 1

1. Layers of rocks of the earth’s crust are subjected to compressional forces.
2. Intense folding result in the formation of an overfold.
3. With increased pressure, the overfold results in the formation of recumbent fold producing a thrust plane.
4. The upper part of the recumbent fold slides forward over the lower part along the fault plane resulting to the formation of an overthrust fold.