The Arkona Basin, situated in the westernmost part of the Baltic Sea, underwent a specific Late Glacial and post-glacial evolution reflected in the layers of bottom sediments. The lithostratigraphy of the representative section PSh-5441 of this basin (at a depth of 46 m) was established based on the results of the sedimentological analysis and radiocarbon (¹⁴C) dating. Spores–pollen spectra were used for biostratigraphy, while diatom analysis was carried out to evaluate the sedimentary environment.
The sediment section from the northern part of the Arkona Basin consists of the Late Glacial and post-glacial clays and silts which accumulated after territory deglaciation. Layers of brown and grey clays separated from each other by sedimentation hiatus had been developing under very changeable sedimentation conditions which could exist in the shallow basin at the end of the Baltic Ice Lake stage and in the later period. This time of development is marked by active processes of re-deposition. During the Litorina Sea stage two phases of sedimentation are distinguished. In the first phase, the water salinity was rather high and sedimentation took place under sub-littoral environmental conditions. In the second phase, it was possible to observe a slight raise of water level, and water salinity slightly increased as well. Sedimentation took place in the shallow sea.

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