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1 Polish Geological Institute Special Papers

1 2008

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Lagoon sediments in the central part of the Vistula spit: geochronology, sedimentary environment and peculiarities of geological settings

Bitinas A., Boldyrev V., Damušyte A., Grigiene A., Vaikutiene A., Žaromskis R.

Polish Geological Institute Special Papers

2008

Vol. 23

9-20

Lagoon gyttja layers occurring in anomalously high position (up to 2.5 m above the present-day sea level) are known from the central part of the Vistula Spit (Kaliningrad region of the Russian Federation). Complex investigations of lagoon sediments (gyttja, sand), including radiocarbon (14C) dating as well as mollusc, pollen and diatom analyses, have been carried out in 2004–2005. The results of these investigations indicate that the lagoon sediments were deposited in the Late Subboreal–Early Subatlantic period in a shallow freshwater, overgrown basin periodically influenced by brackish water. The anomalously high level of the lagoon gyttja is determined by neotectonic activity of Earth’s crust blocks.