A reverse force results from the compression of two plates. The compressional stresses leads to the collision or pushing of two rock plates or slabs into each other. so the collapsing rock slabs are almost vertical but slightly tilted towards the left at the middle length. The foot wall and hanging wall move opposite to each other. Generally it takes place at tectonic plate boundaries.
Mountains isolated many groups that migrated to the region. Dense forest served as a barrier to migration across the region. Vast plains facilitated the migration of people across the region.
