the earliest evidence for agricultural activity is from the early neolithic in the upper part of the valley. in the early bronze age the cetina culture, a geographically pervasive group with contacts throughout the adriatic basin, became dominant. extensive "mound fields" are recorded on the lower valley slopes at several locations around cetina, vrlika and bajagić. as in other parts of europe, the river appears to have been the focus of the intentional deposition of artifacts throughout prehistory. this is particularly true at the confluence of the cetina and ruda rivers at trilj.