Browsing by Author "Rzepecki, Seweryn"

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    Factors influencing temporal changes in chemical composition of biogenic deposits in the middle Tążyna River Valley (Kuyavian Lakeland, central Poland)
    (Instytut Geologii UAM, 2016-08) Okupny, Daniel; Rzepecki, Seweryn; Borówka, Ryszard Krzysztof; Forysiak, Jacek; Twardy, Juliusz; Fortuniak, Anna; Tomkowiak, Julita
    The present paper discusses the influence of geochemical properties on biogenic deposits in the Wilkostowo mire near Toruń, central Poland. The analysed core has allowed the documentation of environmental changes between the older part of the Atlantic Period and the present day (probably interrupted at the turn of the Meso- and Neoholocene). In order to reconstruct the main stages in the sedimentation of biogenic deposits, we have used stratigraphic variability of selected litho-geochemical elements (organic matter, calcium carbonate, biogenic and terrigenous silica, macro- and micro-elements: Na, K, Mg, Ca, Fe, Mn, Cu, Zn, Pb, Cr and Ni). The main litho-geochemical component is CaCO 3 ; its content ranges from 4.1 per cent to 92 per cent. The variability of CaCO 3 content reflects mainly changes in hydrolog- ical and geomorphological conditions within the catchment area. The effects of prehistoric anthropogenic activities in the catchment of the River Tążyna, e.g., the use of saline water for economic purposes, are recorded in a change from calcareous gyttja into detritus-calcareous gyttja sedimentation and an increased content of lithophilous elements (Na, K, Mg and Ni) in the sediments. Principal component analysis (PCA) has enabled the distinction the most important factors that affected the chemical composition of sediments at the Wilkostowo site, i.e., mechanical and chemical den- udation processes in the catchment, changes in redox conditions, bioaccumulation of selected elements and human activity. Sediments of the Wilkostowo mire are located in the direct vicinity of an archaeological site, where traces of intensive settlement dating back to the Neolithic have been documented. The settlement phase is recorded both in li- thology and geochemical properties of biogenic deposits which fill the reservoir formed at the bottom of the Parchania Canal Valley.
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    Mining of lithic erratic raw material in the Polish Lowland in prehistory - a precedent or common practice?
    (Instytut Archeologii UŁ, Łódzka Fundacja Badań Naukowych, Stowarzyszenie Naukowe Archeologów Polskich, 2017) Chachlikowski, Piotr; Marciniak-Kajzer, Anna; Andrzejewski, Aleksander; Golański, Adam; Rzepecki, Seweryn; Wąs, Marcin
    Stone raw materials were actively procured by the inhabitants of the Polish Lowland in prehistory by way of intense exploitation of the local resources of Fennoscandian erratic boulders and pebbles and – on a very small scale – by gaining “imports” from the areas rich in stone resources. A particularly abundant source of stone for these communities were boulders and pebbles deposited in the form of rock block assemblages that constituted the so-called Pleistocene pavements deposited by the continental glacier in forms of numerous formations of the early glacial landscape. These local assemblages of erratic stones formed a rich and, at the same time varied in terms of their available assortment, reservoirs of raw material useful in the prehistoric stone production, and also finding their application as building material. The more and more source-documented examples prove that the societies that inhabited the Polish Lowland in the past exploited rock material largely by way of mining exploitation of appropriate (in terms of lithological and size-related features) rock concretions from among the pool of erratic stones that formed the local glacial pavements. The relics linked with prehistoric mining of stone pavements in the Lowland do not belong to the category of unprecedented objects on the archaeological map of the polish Lowland any more. On the contrary, the assumption may be that this method of raw material procurement was relatively common among the societies that inhabited in the past the areas covered by the last Pleistocene glaciation.
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    Środkowoneolityczne znaleziska talerzy z Niżu Polski
    (Wydawnictwo Naukowe UAM, 2003) Rzepecki, Seweryn
    In this paper the author concentrates on the problem of the occurrence of clay plates within the region of the Polish Lowland. The sources are findings known from the literature as well as those excavated recently. Comparative analyses related territorially to Europe and chronologically to the period 4400-3800 BC.