leaves the crust undeformed
Explanation:
An epeirogenic change leaves the crust undeformed. It is significantly different from an orogenic change which makes the crust deformed.
This change produced by epeirogenesis is notable in stable continental regions called a craton. Long wavelength folds leaving the landform rolling and undulating are typical signatures of this deformational patterns. In an orogenic deformation, there is a noticeable change in the landform.