Eroded valleys are landforms created by the erosion of water and wind over time. They are typically characterized by steep sides and a flat bottom, and can be found in many different types of terrain. RAVINES and GULLIES are two common types of eroded valleys. RAVINES are deep, narrow valleys with steep sides, while GULLIES are shallow, wide valleys with less steep sides. Both RAVINES and GULLIES are formed by the same process of erosion, but the shape and size of the valley depends on the type of terrain and the amount of erosion that has occurred.