Quaternary geology and development of the alluvial plain of the Natural Park "Alluvial plain of the Dyje River" between Břeclav and Lednice

Geoscience Research Reports 40, 2007 (GRR for 2006), pages 58–59

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Abstract

The investigated part of the River Dyje floodplain belongs to the intermontane depression of the Vienna Basin in which the Miocene and Quaternary sediments occur. The basal gravel at the valley floor is the oldest Quaternary sediment in the area and is dated to 16,170 ± 480 B.P. ( Hv-9728, Poštorná). The redeposition of the gravel continued untill the Lower and Upper Holocene respectively as evidenced by sample Hv-9729, Poštorná - Charvátská Nová Ves dated to 7,990 ± 95 B.P., Pohansko near Nejdek. The gravel is overlain by Late Glacial to Early Holocene sand dunes called locally "hrúdy". In the dune sand a buried soil of the pseudochernozem type is developed in places ("Barvínkův hrúd" - Břeclav, Pohansko), evidencing short break in the sand deposition. The youngest are the overbank flood loams overlying the gravel and partly overlying the sand dunes. Frequent oxbow lakes and abondoned channels bearing organic clay, loam and bog earth are typical of this region.