a fault

Leonard D Harris has written:

'Fracture system in the Eastern overthrust belt' -- subject(s): Rock deformation

an overhtrust is formed when pressure becomes very great and a fractur occus and the recumbent fold is pushed over the other fomring an over thrust fold

Crustal deformation. That is, when pieces of the Earth's crust change shape due to tectonic forces.

H.A Pohn has written:

'Lateral ramps in the folded Appalachians and in overthrust belts worldwide : a fundamental element of thrust-belt architecture / by Howard A. Pohn' -- subject(s): Thrust faults (Geology) - Appalachian Mountains