In 1951, archeologist Osman Habibulla began excavation in the settlement, clarifying the stratigraphy and cultural strata of the area. The
tell was much disturbed in the past. As excavators had found, the town features a cultural layer with the total depth of 22 m. The earliest 9 m of this belongs to the
Neolithic. Some
Halaf culture artifacts have been found. In the
Eneolithic layer the excavators discovered remains of buildings, as well as burial places. These buildings were round as well as rectangular-shaped, and were made of mudbrick. The diameter of the round constructions was around 6–8 meters. The rectangular ones are about 15 sq. m in size. These structures were typically connected with agriculture. 85 burial places were investigated in the Eneolithic layer. In 31 of those excavators found pottery dishes, items made of bones and stone, and beads. On top of that are the remains of the
Bronze Age, and then the
Early Iron Age. At each of these layers a variety of artifacts were found: pottery dishes, cattle-breeding and agricultural implements, adornments, weapons etc. According to recent research (2019), the data from Kültepe I and the nearby
Kültepe II indicate that "the adoption of a productive economy in the South Caucasus probably results from several events, including the migrations of peoples from Iran and Mesopotamia". In regard to
Kura–Araxes culture in the last quarter of the 4th millennium, it seems that the peoples that settled at Kültepe I were culturally distinct from those that settled at Kültepe II. ==Copper–arsenic==