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STRUCTURE AND AGE OF TERRACES AND FLOOD PLAINS: CASE STUDY FROM THE CZARNA KONECKA (HOLY CROSS MOUNTAINS - POLISH UPLANDS)

The study of alluvia and morphology of the upper Czarna Konecka river valley downstream of Stąporków (Polish Uplands) was carried out. The interdisciplinary approach used a wide range of methods: geological, sedimentological, geomorphological, geoarchaeological, cartographic and historical. The valley developed since Middle Polish Glaciations. The valley can be divided into some morphological levels of different age and structure. Terraces composed of sandy channel sediments of braided river. Alluvia of flood plains show a clear facial differentiation typical for meandering river. Distinct variation of sedimentation types on valley bottom indicate changes in the frequency of floods in the Holocene related to climate fluctuations and human impact.