Geology of the Baltic Sea
The geology of the Baltic Sea is characterized by having areas located both at the Baltic Shield of the East European Craton and in the Danish-North German-Polish Caledonides. Historical geologists make a distinction between the current Baltic Sea depression, formed in the Cenozoic era, and the much older sedimentary basins whose sediments are preserved in the zone. Although glacial erosion has contributed to shape the present depression, the Baltic trough is largely a depression of tectonic origin that existed long before the Quaternary glaciation.
| Evolution of the Baltic Sea |
|---|
| Pleistocene |
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Eemian Sea (130,000–115,000 BC) Ice sheets and seas (115,000–12,600 BC) |
| Holocene |
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Baltic Ice Lake (12,600–10,300 BC) Yoldia Sea (10,300–9,500 BC) Ancylus Lake (9,500–8,000 BC) Mastogloia Sea (8,000–7,500 BC) Littorina Sea (7,500–4,000 BC) Modern Baltic Sea (4,000 BC–present) |
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