The Lower Ishim Basin in the Sociocultural Space of the Trans-Ural Neolithic (based on data from the Mergen archaeological microregion)

The Neolithic period in the Lower Ishim Basin (Western Siberia) is represented by several cultures and pottery groups (Boborykino, Koshkino, the group of the cordoned ware, Kozlovo, Mahanjar, comb ceramics with the features of the Sosnovoostrovskaya Culture, Kokuy, and Ekaterininsk). The reference territory for the study of the period comprises the north-eastern shore of Lake Mergen. Basen on the study of the settlements of Mergen 3, 5, 6, 7, and 8 the vectors and nature of the relations between the Lower Ishim Basin population and that of the adjoining territories have been identified. The aim was set by the need for tracking their dynamics in retrospective — from Neolithisation of the region to the final stage of the period, and in the context of the extant V.S. Mosin’s hypothesis of the sociocultural space of the Trans-Urals. As the basic markers of these processes, the following have been considered: raw material preferences within the lithic industries; morphological, ornamental, and technological specifics of the featured ceramic complexes; and specifics of economic adaptation. The data analysis has revealed that in the early and middle Neolithic (7th — mid to the third quarter of the 5th mil. BC) the dominant direction of contacts was south-south-western, western, and, proba-bly, north-western (the Upper Ishim River and the Turgay Depression, the Tobol-Iset and Upper Miass River regions, the Lower Tobol River Basin, left bank of the Irtysh River, and, probably, the Konda lowland). The population of the Ishim River valley during this period constituted an integral part of the sociocultural space of the Trans-Urals. At the end of the Neolithic (the third quarter of the 5th — first quarter of the 4th mil. BC), the principal vector of the relations of the population of the Lower Ishim Basin shifts to the east, which resulted in the formation of the syncretic Kokuy complexes (on the basis of the Artyn Culture of the right-bank Irtysh Basin and Baraba and in the penetration into the river valley of the bearers of the comb-pit (Ekaterininsk) tradition of the Middle Irtysh River Basin.