Geographia Polonica Vol. 97 No. 3 (2024)

The enigma of the outflow from the Warsaw ice-dammed lake in Central Poland through the Warsaw-Berlin ice-marginal spillway during the Vistulian (Weichselian) Glaciation is discussed. Many years’ research and published concepts expressed in numerous publications since the beginning of the 20th century are presented. A runoff in the Warsaw-Berlin ice-marginal spillway was treated as impossible during the LGM, because of a high watershed zone close to Łęczyca. The floor of this ice-marginal spillway is filled by silt and sands series correlated with Upper Weichselian and sand with peat complex Late Weichselian and Holocene Age. However, a relation of the glaciolacustrine sediments and the spillway floor indicates that the latter is masked by a deposits postdate the outflow episode. Proglacial and extraglacial waters were collected in the Warsaw ice-dammed lake and was drained westwards through the Warsaw-Berlin ice-marginal spillway.

24 cm