Generally, valleys are larger than basins, which are narrower, and what encompasses a valley can be determined by how it is formed. Rift valleys, for example, are created because of plate tectonics. The actual shape of the valley is dependent upon the stream from which it flows. For instance, a valley formed from glaciers is usually V-shaped.
Basins, on the other hand, are typically circular. Creeks and streams are characteristics of a basin, and they assist in draining the water that falls on the surface into a river and then conducted to the ocean. By definition, a basin is a depression on the earth’s surface, which is surrounded by land that is elevated. A valley is also depression or cavity between the hills, uplands, and mountains.