The Azmak settlement mound has T a very favourable position: it is situated in the midst of a fertile plain, surrounded on three sides by marsh land, from which it takes its name, Azmak being the Bulgarian for marsh. It is 7.94 m. high, with a diameter at its base of 80 m.; it covers an area of 5,500 sq. m.
The excavations between 1960 and 1963 yielded no less than 10,000 finds, mainly from the Neolithic and Eneolithic periods. The thickness of the accumulated cultural levels was 7-5 m., of which 3 m. belonged to the Neolithic period and 4-5 m. to the Eneolithic and Bronze Ages. The 3 m. belonging to the Neolithic period consisted of six building levels, five of which can be attributed to the culture known as Karanovo I, and the sixth, much destroyed, to the culture known as Karanovo 111, especially as known from the Jassa Tepe I level at Plovdiv.