Major ancient faults like that can remain as weak zones in the Earth’s crust and then focus ongoing tectonic strain,” noted ...

Reverse faults, in contrast, form in regions where the crust is being compressed. These compressional forces cause the hanging wall to move upward relative to the footwall.

Extension and contraction each have an associated type of fault. Normal faults describe where two plates are pulling apart, allowing the side resting above to slide down on an angle. Reverse ...