The rivers, including Aras, in the Mughan region played an important role in the formation of the prehistoric sites. The Mughan Plain has not received particular attention in terms of the archaeological investigations, as the extensive scientific activities concentrated on the Lake Urmia basin. Yataq-Tepesi is a prehistoric site in the city of Germi (Mughan Region) that became the subject of the scientific research. The main aim of this paper is to discuss the pottery traditions at the site and to determine the chronological sequence of the studied region. In view of further detailed studies on the cultural relations of Mughan population with other territories, and to establish its chronological sequence, two main questions are posed: how do we date Yataq-Tepesi on the basis of cultural information, including pottery traditions? The main hypothesis suggested here is that the site development took place during the Middle Chalcolithic and Late Chalcolithic periods, somewhere between 4500 and 3700 / 3600 BC. The second question relates to the geographical regions that Yataq-Tepesi was in contact with through cultural relations and trade with other regions of northwestern Iran, especially with the region of Qaradagh and the Lake Urmia basin, as well as with the Southern Caucasus.