Thrust Faults Chief Mountain a thrust (or overthrust)fault is a low-angle reverse fault again resulting from compressive forces Thrust faults are very common in highly folded mountain belts(the example is from Glacier National Park) Older rocks Fault plane Younger rocks a thrust fault may look a bit like an unconformity in that completely different rocks are separated by a plar surface. With a thrust fault, however, the older rocks have been pushed up on top9 Thrust Faults A thrust (or overthrust) fault is a low-angle reverse fault, again resulting from compressive forces. Thrust faults are very common in highly folded mountain belts (the example is from Glacier National Park). Chief Mountain A thrust fault may look a bit like an unconformity in that completely different rocks are separated by a plane surface. With a thrust fault, however, the older rocks have been pushed up on top! Fault plane Older rocks Younger rocks