 The strata are disposed in North-South and northwest-southeast aligned layers, producing asymmetric valleys and ridges.Among the latter are the steep edge of the Bârlad Plateau (), known as the Iași Ridge (), the edge of the Central Moldavian Plateau (), known as the Cornești Hills, and the edge of the Dniester Hills, known as the Dniester Ridge.The relief in the valleys of the rivers and creeks is quite conspicuous, so that the valleys have large terraces and hillocks.