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Copyright of Acta Geographica Lodziensia is the property of Lodz Scientific Society / Lodzkie Towarzystwo Naukowe and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The chemical composition of organic deposits from the site Koźmin Las are the basis of reconstruction of environment conditions of the Warta River valley at the end of the Alleröd and in the Younger Dryas. Environmental archives presented in this study, comprise organic matter content, mineral matter content, calcium carbonate content, reaction and macro- (Na, K, Mg, Ca, Fe, Mn) and microelements (Cu, Zn and Pb). The sorption of metals by organic matter and hydrated iron oxides, clay minerals accumulation variability in depositional environment, water relations of the ecosystem and bioaccumulation of some elements are the factors determining the chemical composition of organic sediments in the Warta river valley. [ABSTRACT FROM AUTHOR]