Geomorfologický vývoj jihomoravských niv
| Title in English | Geomorphological development of Southern-Moravian alluvial plains |
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| Authors | |
| Year of publication | 2004 |
| Type | Chapter of a book |
| MU Faculty or unit | |
| Citation | |
| Description | The development of alluvial plains on the Dyje River below Nové Mlýny Reservoirs and the plain of Morava River below Hodonín started in Low Pleistocene. Two main tributaries entered Dolnomoravský úval Lowland – part of Neogene sedimentary Vienna Basin: Ancient-Dyje River with its tributary Morava coming form NW from the Vyškov Gate and Ancient-Dřevnice from Moravian-Slovakian Carpathians from NE. Coarse Lower Pleistocene gravels and sands filled up the basin bottom up to the thickness of 55 m. The Ancient-Dyje River transported cobblestones made by crystalline rocks of Bohemian Massiff while the Ancient-Dřevnice River transported flysh rock gravel only. The Gate of Napajedla across Western Carpathians was opened in Middle Pleistocene in Riss Ice Age 250 000 BP and New-Morava River started to bring rocks from Jeseniky Mts. into the Dolnomoravský úval Lowland. Cold periods are typical with changing processes of erosion and sedimentation. Holocene is a period of relative stable sedimentation quietude. Typical sandy-loamy deposits started to be accumulated since app. 3500 BP. The thickness of such deposits is about 6-8 m close to Dolní Věstonice and app. 8-10 m in the Lower Morava River valley. Residuals of wind blown sands form local elevations in alluvium called „hroud“ (pl. „hroudi“). |