Výplň týlní deprese sesuvu mezi Židlochovicemi a Blučinou na severozápadním okraji Výhonu


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Title in English Quaternary depression behind lanslide front between Židlochovice and Blučina on northwestern margin of the Výhon hillock


Year of publication 2020
Type Article in Periodical
Magazine / Source Geologické výzkumy na Moravě a ve Slezsku
MU Faculty or unit

Faculty of Science

Web https://doi.org/10.5817/GVMS2020-13480
Doi http://dx.doi.org/10.5817/GVMS2020-13480
Keywords Radiocarbon dating; ERT survey; lake and wetland deposits; slope deposits; landslides; Cézavy site; Bronze Age
Description The studied area is located in a small saddle between Strže (Cézavy) ridge and Výhon hill. Morphology of explored area originated during large landslide. The landslide front formed the Strže (Cézavy) ridge. Landslide scarp gave shape to the slope of Výhon hill. Studied saddle lies between the lanslide front and the scarp. The saddle actually forms a small depression suitable for accumulation of Quaternary (Holocene) sediments. The „Cézavy“ site is an important Bronze Age settlement. Geological setting was examined in situ by evaluation of the bore hole cores and electric resistivity tomography. Selected horizons were dated by C14 method. Holocene infill of the depression is composed of two sedimentary units: central facies of dark coloured lacustrine-swamp clayey-silty sediments and marginal facies of clayey-silty-sandy sediments. Depression of assymetrical shape is deepest near SE foothill of the Cezávy ridge (directly behind the landslide front), where started infilling as soon as ~3 600 BP or earlier. The Quaternary infill of the depression is underlain by bodies of Miocene (Badenian) rocks. Geochronological model shows existence of swamps-lacustrine basins in a time span since 17th century BC till 18th century AD. Local morphology in depression is caused by minor landslides which originated from primary scarp (Výhon hill slope). Last significant events were probably extensive, historically recorded landslides in 70‘s of 18th century. Recent morphology was formed as late as in 19th century.

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