Among these, Yeşilyurt plain, as well as Çamköy and Ula plains, ceased to be fully hermetical in time, and with a smaller depression opening a passage in its north, Yeşilyurt plain acquired the characteristics of fluvio-karst formations, becoming the starting point of the Çineçay (Marsyas) that joins the Menderes river 100 kilometers farther north near Aydın.