DSC07903 (2)

DSC07903 (2)



262

- Slope seąuences, mostly deposited under rock cliffs display changes in    °c

rock serce size, humus and carbonate content. The enhanced dynamics of serce formation is conveyed by coarse sedimentation, often without matrix. On the    2‘

other hand the standstill phase can be determined on the basis of soil horizons    11

evolution. Some special cases Iike Early-Holocene cemented screes (9-12 ka    h

BP) are product of morę humid episodes (Żak et al. 2001), while coarse grained    2

screes of Subboreal (700-1250 BC) containing dark, humic materiał corre-    '

spond to a major continentality shift (Lożek 1988).    r

-    Fine grained wash-down sediments deposited in dellens display the alike depositional pattem in dependence on anthropogenic deforestration, tillage or pasture. They may represent the products of flash-floods and other hydro-logical events (Lożek 1976).

—    Karst and pseudokarst infillings of cave and rockshelter entrances represent continuation of slope sedimentation but other aspects such as flowstone (humid phase) and breakdown horizons (usually Continental or oscillating climate) are present. The soil sediments washed down into dark cave environ-ment are not influenced by pedogenesis and thus conserved for further re-search. The human settlement is common and the correlation between natu-ral conditions and human cultures is being possible in such aspects as hunting activities, Mesolithic hazelnut gathering, deforestration and many other ones (Kukla, Lożek 1958; Svoboda et al. 1998).

't. - Floodplain deposits represent key transitional members between aąuatic and terrestrial seąuences. They reflect erosional and depositional processes of individual catchments. Gravel and sand correspond to the high flood ac-tivities, while Fluvisol formation is dependent on stand-still phases. The buried archaeological finds provide evidence for morphological development of floodplains in different time slices. The sediments of oxbow lakes and aban-doned meanders are in some areas of Bohemian Creataceous Basin calcare-ous and thus they may enable correlation between faunal and floral evidence.

- Tufa deposits have the exceptional and often dominant position among other Holocene seąuences because their architecture reflects several impor-tant structures; intensity of carbonate metabolism, hydrological changes, rock scree formation episodes and most significantly prolonged drought episodes. There exists an almost uniform pattem of tufa sedimentation in Mid-European context in a rangę starting in Thuringia (Germany), covering the whole area of Czech Republic and reaching as far as to Southern Moravia and South-Eastern Slovakia. Tufa bodies often contain intercalations of several (2-4) humic fossil soils of Epiatlantic to Subboreal age corresponding to dry peri-


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