Sedimentology of Wartanian outwash near Bełchatów, central Poland |
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| Authors: | DARIUSZ KRZYSZKOWSKI |
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| Institution: | Geographical Institute, University of Wroclaw, pl. Uniwersytecki 1, 50–137 Wroclaw, Poland;14th November 1991 |
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| Abstract: | The braided outwash of Wartanian age near Be?chatów, central Poland, was formed synchronously by two river systems: glacier streams flowing from the northwest and west and periglacial rivers flowing from the south and southwest. An extensive alluvial fan was formed which later developed into a highly aggrading fan due to a rising water level in the proglacial lake to the north. Braided streams were represented by relatively low-energy systems with shallow-channel and/or transverse bar deposition. Sporadically, rapid inflows of meltwater caused more energetic conditions and formation of large scours. The latter were found only in the glacier streams and this was confirmed by palaeocurrent measurements and analyses of quartz roundness. |
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