Z badań nad zasięgiem zlodowacenia środkowopolskiego w Górach Świętokrzyskich (Pasmo Jeleniowskie-Dolina Kamiennej)
Abstract
The extend of the Middle Poland Glaciation in Holy Cross Mts. (Southern Poland)
The area examined is situated on the northern slope of the mountains and in the Kamienna valley. Up to now, the end moraines lying north of the Kamienna were considered as the line of maximal range of the Middle Polish Glaciation, but the author found deposits of this glaciation also south of the Kamienna valley. The general stratigraphy of the Middle Polish Glaciation (Riss) sediments is as follows. On remnants of the South Polish Glaciation (greenish sandy boulder clay and a boulder pavement) lie two horizons of boulder clay sandwiched by a sand and gravel series and by loess-like deposits. The lower boulder clay is about 3—7 m thick; its top part is strongly weathered and cut by periglacial lice wedges. The non-stratified sand and gravel series developed by weathering processes (1,5 m thick) is covered with loess-like deposits. On (these loess-like deposits lies the upper boulder clay, characterized by a slight admixture of local rocky material and more rich in Scandinavian rocks than the lower one. In the Kamienna valley the Middle Polish Glaciation boulder clay is underlain by a thick series of fluvioglacial sediments formed during the advance of glacier. The author believes that the Middle Polish glacier reached the lower part of the mountains at the level of 320—300 m a.s.l. and penetrated mountain valleys extending in the direction of the glacial movement.
The area examined is situated on the northern slope of the mountains and in the Kamienna valley. Up to now, the end moraines lying north of the Kamienna were considered as the line of maximal range of the Middle Polish Glaciation, but the author found deposits of this glaciation also south of the Kamienna valley. The general stratigraphy of the Middle Polish Glaciation (Riss) sediments is as follows. On remnants of the South Polish Glaciation (greenish sandy boulder clay and a boulder pavement) lie two horizons of boulder clay sandwiched by a sand and gravel series and by loess-like deposits. The lower boulder clay is about 3—7 m thick; its top part is strongly weathered and cut by periglacial lice wedges. The non-stratified sand and gravel series developed by weathering processes (1,5 m thick) is covered with loess-like deposits. On (these loess-like deposits lies the upper boulder clay, characterized by a slight admixture of local rocky material and more rich in Scandinavian rocks than the lower one. In the Kamienna valley the Middle Polish Glaciation boulder clay is underlain by a thick series of fluvioglacial sediments formed during the advance of glacier. The author believes that the Middle Polish glacier reached the lower part of the mountains at the level of 320—300 m a.s.l. and penetrated mountain valleys extending in the direction of the glacial movement.