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Najpełniejszy w Polsce kompleks młodoplejstoceński (eem i vistulian) na dolnym Powiślu i Wzniesieniu Elbląskim

Makowska A.

Przegląd Geologiczny

2004

Vol. 52, nr 9

887--894

The Upper Pleistocene sedimentary complex of the Lower Vistula Region (Lower Powiśle) and the Elbląg Elevation was deposited from the beginning of the Eemian Interglacial to the late Vistulian. The sediments fill an elongated depression formed due to pre-Quarternary processes. The maximum thickness of strata reaches 200 m. They consist of six basic units including three major levels of tills: Toruń (BII), Świecie (BIII) and Leszno-Poznań (BIV) and three levels with intramoraine deposits: the lowest - Lower Powiśle (DP), middle one - Gniew (Gn) and the upper- Grudziądz (Gr). The Lower Powioele Formation consists of marine and terrestrial deposits. In the south, these are tripartite (EI, EII, EIII) valley sediments filling a well-developed network of ancient river valleys. In the north, besides the fluvial sediments, there are also two marine strata: Sztum (Sz) and Tychnowy (Ty). The middle river valley series and the Tychnovy marine layer were formed during the Eeemian. They are the main stratigraphic index zone in the area. The overlying strata were formed during the Vistulian. The latter has been subdivided into two glaciations (Toruń and Vistula) separated with Krastudy Interglacial, because of analysis of major lithostratigraphic zones and multiple layers of marine sediments within the middle intramoraine formation (Gniew Fm.). The exact dating of the strata is still debatable and prone to verification.