Why might the type of rock in the hanging wall of the Lewis thrust be different from the type of rock in the footwall?

Respuesta :

footwall, and displaces the Belt-Purcell rocks for at least 60 km to the .... episodes of deformation in the hanging wall of the Lewis thrust. ... duplexes in the Lewis thrust sheet is also different from the Boyer and Elliott model in that the .... An apparent Rich-type fault-bend fold (Rich, 1934) can also be the result of fault-.