Plejstocen na obszarze południowo-zachodniej części Gór Świętokrzyskich

Piotr Filonowicz


Pleistocene deposits in the SW part of the Holy Cross Mts

The oldest preglacial fluvial deposits, up to 30 m. thick, fill an ice-marginal valley stretching from the environs of Słopiec to Morawica along the actual valleys of Belnianka and Czarna Nida rivers (fig. 1,2). These deposits are overlain toy fluvioglacial sediments of the South Polish Glaciation (Mindel) up to 20 m. thick. The next younger sediments are glacio-lacustriine days, from 0,5 to 2 an. thick, and boulder Clays locally containing clay and mud intercalations, up to 15 m. thick. The latter deposits together with the fluvioglacial ones represent one cycle of glacial sedimentation of the South Polish Glaciation. During the Mindeil/Riss interglacial stage, rivers eroded the older deposits up to the depth of 20 m. below the surface of the present alluvial sediments. In the environs of Słopiec, Suków and Nowiny they deposited dark coloured sands and peat muds, up to 3 m. thick, containing plant debris. The younger cycle of fluvial sedimentation is contemporaneous with the Middle Pollish Glaciation (Risis). It is represented by a sequence of muds, sands and gravels. The total thickness of this series amounts to about 30 m. The icensheeit during the Middle Polish Glaciation did not cover the SW part of the Holy Cross Mts area. Tre present day morphology of this region was formed since the Eemian interglacial stage up to our days, when development of fluvioglacial, glacial and fluvial sediments was modified by deluvial phenomena and deposition of loesses.

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