Faults on which the dominant forces are extensional are recognized by the separation of the pulled-apart rock layers in a zone of omission; these are .

Normal Faults

Explanation:

A normal fault is usually identified as the fault in which the hanging wall (HW) block goes down with respect to the footwall (FW) block. Both the blocks are displaced by a certain displacement, due to the extensional force (or tensional force) acting on them. The layers of rocks here are pulled apart, in the zone of omission.

These faults, including the reverse, strike-slip faults are all planar, contrasting geological features that are found in the region where the rocks experience compressional or tensional forces.

the fossil record provides evidence of a common ancestor to many species.