Geochemical tools for the stratigraphic correlation of floodplain deposits of the Morava River in Strážnické Pomoraví, Czech Republic from the last millennium.
|Year of publication||2009|
|Type||Article in Periodical|
|Magazine / Source||Catena|
|MU Faculty or unit|
|Field||Geology and mineralogy|
|Keywords||fluvial archives; environmental change; chemostratigraphy; proxy analyses|
|Description||The floodplain of the Morava River in Strážnické Pomoraví, south east Moravia, Czech Republic contains a very valuable record of regional environmental change. We studied 8 outcrops of floodplain deposits from 4 localities along a 6 km long part of the current meander belt of the Morava using geochemical proxy analyses, magnetic susceptibility measurements, 14C dating of wood remnants, and sediment micromorphology. The proxy methods are based on elemental analysis (EDXRF) and analysis of the cation exchange capacity of clay minerals; granulometric analyses provided the basis for lithological and facies assignment of the sediments. The mean depositional rate over the period from about 1000 to about 1900 AD ranged from 0.2 to 0.6 mmy depending on the sedimentary facies. The coeval lithological change in the majority of the studied sections indicated a change of the meander belt structure at between ~1200 AD and ~1600 AD probably as a consequence of changes of channel structure.|