Interdisciplinary research of ash heap sediment near Stepnoye settlement (Chelyabinsk Oblast)
Dados Bibliográficos
An ash heap is defined as a specific object at an archaeological site, usually in the form of a separate hillock containing a layer of finely-dispersed greyish-yellow or ash-coloured soil. The existing assumptions about the formation and functional pur-pose of ash heaps, as special archaeological objects found near the Bronze Age pastoral settlements, have so far been poorly supported by scientific data. At the ash heap near the Sintashta fortified settlement of Stepnoye, Chelyabinsk Oblast, for the first time, large-scale and comprehensive studies were carried out on the structure of these deposits, their granulometric and geo-chemical composition, in combination with the analysis of plant macroremains, paleoparasites, microbiomorphic and palynologi-cal complexes, indicative bacterial groups, and keratinophilic fungi. Judging by the archaeological materials, it is patently obvi-ous that this was a multifunctional object that developed over many centuries and played different roles at different stages. The results of the conducted analyses showed that the 45 cm thick "ash" horizon in the Stepnoye ash heap contains a significant proportion of a fine sand fraction, and not a silty fraction. An increase in the biophilic elements (predominantly calcium, as well as phosphorus and sulphur), accumulated mainly in the organic matter of faunal origin, was noted in the upper bench of the ash layer. However, the high concentration of phytoliths in the "ashy" deposits indicates that the layer was formed mainly as a result of the accumulation of a large amount of plant organic matter. The absence of charcoal and the scarcity of charred macro-remains indicate that the deposited organic material was not burnt but decomposed naturally. The increased content of sapro-trophic bacteria in the "ashy" layer also supports the natural decomposition of an organic matter. The composition of the phyto-lithic and pollen spectrum of the "ashy" horizon is not typical for the steppe of the south of Western Siberia, since it is dominated by a group of mixed herbs with elements of a ruderal flora, and not by cereals. All the data supports the hypothesis that the ash heap is the result of regular practice of cleaning of the floor and interiors of the buildings of the fortified settlement of Stepnoye. This is evidenced by the increase in the number of keratinophilic fungi, which decompose wool and hair and therefore accumu-late in the occupational layer of the structures. Based on the results of the study, the hypotheses that the Stepnoye ash heap is a place of consolidated ash removal or composting of stable manure were rejected
Archaeology · Geography · Mineralogy · Organic matter · Archaeology and ancient environmental studies · Chemistry · Environmental Science · Geology and Paleoclimatology Research · Soil and Environmental Studies · Geology
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