Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Sedimentary sequence of the Late Glacial and Holocene age in the centre of Lysá nad Labem
Abstract
During documentation of geological sections in townsquare and an access road to the castle in Lysá nad Labem a complex sequence of Quaternary sediments was observed. Loess on the base of the section is probably from the closing period of the Last Glacial maximum. In superposition a fan like body of sandy runoff sediments formed by erosion from the area of today's castle hill from the north-north-west has been observed. This sediment has been probably formed in the warmer oscillations (Bolling, Allerad) at the end of the Last Glacial. On the slopes of runoff fan flat layers of fine grained aeolian sand deposited probably during the Younger Dryas were found. Depresion on the side of runoff fan was filled during Younger Holocene by fine grained sandy runoff from the surrounding area. Increased erosion and accumulation processes related to human activity in the immediate vicinity of the studied section. Depresion was fully filled up during the Middle Ages and modern times due to increased anthropogenic activities in the Medieval and modern city.
