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Chapter 10
Submerged Holocene Wave-Cut Cliffs
in the South-eastern Part of the Baltic Sea:
Reinterpretation Based on Recent
Bathymetrical Data
Vadim Sivkov, Dimitry Dorokhov, and Marina Ulyanova
Abstract As the existing data on the location, number, and age of submerged
Holocene wave-cut cliffs (submerged coastlines) in the Gulf of Gdansk (SE Baltic
Sea) are rather conflicting, earlier data were reanalysed and compared with recent
information. Digital bathymetric and slope angle maps were developed from the
modern 1:25,000, 1:50,000, and 1:100,000 nautical charts. The maximum slope
lines were assumed to correspond to wave-cut cliff axes. A total of five axial lines of
post-glacial wave-cut cliffs were identified: two dated to the Yoldia Sea (58-45 and
52-40 m), one assigned to the Ancylus Lake (38 m), and two dated to the Littorina
Sea (29 and 21 m).
Keywords Holocene
·
Submerged wave-cut cliffs
·
Baltic sea
·
Gulf of
Gdansk
·
Axial lines
·
GIS
10.1 Introduction
Primarily as a result of interplay between glacio-isostatic movements and eustatic
sea-level changes, evolution of the southern Baltic coast in the Late Pleistocene and
Holocene was closely related to the presence of thresholds off Sweden and Denmark
and to changes in the relative sea level. To some extent, the coast's evolution was
also associated with the geological setting, sediment erosion and accumulation, and
climatic oscillations.
Despite ample research on the history of the Baltic Sea (Björck 1995 , Eronen
1988 , Gudelis 1979 , Gudelis and Königsson 1979 , Harff et al. 2001 , Harff and
Meyer 2008 , Ignatius et al. 1981 , Kvasov 1975 , Mörner 1980 , Uscinowicz 2003 ) ,
many questions related to the Late Quaternary events in the area still remain
unanswered. The unresolved questions include some key palaeogeographic issues,
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