Normal Fault Hanging Wall Moves

Reverse faults form when the hanging wall moves up.

Normal fault hanging wall moves.

The hanging wall moves up relative to the foot wall. 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. In a reverse fault the hanging wall block moves up relative to the footwall block. The hanging wall moves down relative to the foot wall.

A n fault forms when the hanging wall moves down relative to the footwall a. They bound many of the mountain ranges of the world and many of the rift valleys found along spreading margins. An upthrown block between two normal faults dipping away from each other is a horst. Formed by compressional stress rocks are pushed towards each other thrust fault.

Normal faults form in response to horizontal tensional stresses that stretch or elongate the rocks. In a strike slip fault a the hanging wall moves down relative to the footwall b the hanging wall moves up relative to the footwall at the angle of 30 degrees or less c the hanging wall moves up relative to the footwall at an angle of 45 degrees or more d the fault blocks move horizontally in opposite directions. Together normal and reverse faults are called dip slip faults because the movement on them occurs along the dip direction either down or up respectively. Special type of reverse fault that is nearly horizontal angle has less than 45 degrees strike slip fault.

Normal fault s are common. In a normal fault the hanging wall moves downward relative to the footwall. The forces creating reverse faults are compressional pushing the sides together. Normal fault geology a type of fault in which the hanging wall moves down relative to the footwall and the fault surface dips steeply commonly from 50o to 90o.

Low angle normal faults with regional tectonic significance may be designated detachment faults. Normal fractures in rock with no offset where there has been no motion are called. A downthrown block between two normal faults dipping towards each other is a graben. The hanging wall slides down relative to the footwall.