Normal faults occur in areas undergoing extension stretching.
Hanging wall normal fault.
In a normal fault the side that slides downward has a shape that makes it look like it is reaching or hanging out over the side so we call it the hanging wall.
The other side is shaped a little.
The term footwall is derived from miners finding mineral deposits where inactive faults have been filled in with mineral deposits at their feet.
A normal fault will have a hanging wall and a footwall.
The hanging wall slides down relative to the footwall.
Normal dip slip faults are produced by vertical compression as earth s crust lengthens.
In models without a plastic sheet numerous secondary normal faults form in the hanging wall of the master normal fault.
If you imagine undoing the motion of a normal fault you will undo the stretching and thus shorten the horizontal distance between two points on either side of the fault.
Normal fault a type of fault in which the hanging wall moves down relative to the footwall and the fault surface dips steeply commonly from 50 o to 90 o.
Normal fault s are common.
They bound many of the mountain ranges of the world and many of the rift valleys found along spreading margins.