GEOLOGY

Detailed explanation-1: -Normal faults are fractures caused by horizontal tension. Movement along a normal fault is partly horizontal and partly vertical. The horizontal movement along a normal fault occurs in such a way as to extend the crust.

Detailed explanation-2: -Normal Faults-are faults that result from horizontal tensional stresses in brittle rocks and where the hanging-wall block has moved down relative to the footwall block.

Detailed explanation-3: -An en echelon or stepped array represents a set of tensile fractures that form within a fault zone parallel to each other.

Detailed explanation-4: -Normal faults result from tensional forces when rocks are displaced away from each other. Reverse faults results of compressional forces when rocks are displaced towards each other. Strike-slip or transform faults results from either compressional or extensional forces when rocks slip parallell to each other.