Formy rzeźby, wiek TL osadów i rozwój lodowców ostatniego zlodowacenia w Dolinie Małej Łąki (Tatry Zachodnie)
Abstract
LANDFORMS, TL AGE OF DEPOSITS AND DEVELOPMENT OF GLACIERS IN MAŁA ŁĄKA VALLEY DURING LAST GLACIATION (WESTERN TATRA MTS)
Summary
During the detailed geologic and geomorphologic studies over the Quaternary of Mała Łąka Valley in Western Tatra Mts (19), 13 samples of clay-sandy deposits were collected from all ramparts of terminal and lateral moraines (Fig. 1–7) and patches of ground moraine (Fig. 1, 2 and 7) formed during the Last Glaciation (Vistulian, Wurm). Samples were dated using thermoluminescence (TL) method in the Thermoluminescence Laboratory, Institute of the Earth Sciences of the Maria Curie-Skłodowska University of Lublin. Obtained data were classed within 2 periods, 30–20 ka and 19–16 ka (Fig. 1 and 7). The older dates seem to be connected with deposits of the I Mała Łąka Phase – the maximum extent of glaciers during the Last Glaciation. The younger dates show the age of deposits from the next to maximum stage of glaciers development in the Western Tatra Mts - the II Mała Łąka Phase. These phases are separated from each other by the I Wielka Polana Interphase. Warming after the II Mała Łąka Phase is defined as a II Wielka Polana Interphase. The youngest development of glaciers was during the Stawki – Na Wyżnej Phase, corresponding with the Late Glacial/Early Holocene Pięć Stawów Polskich Phase in the High Tatra Mts. TL dates of glacial deposits preserved in the Mała Ląka Valley show that maximum development of glaciers in the Tatra Mts during the Last Glaciation (30–25 ka) was a prelude to the maximum development of Scandinavian ice-cap in the Polish Lowland (20 ka) during this glaciation.
Summary
During the detailed geologic and geomorphologic studies over the Quaternary of Mała Łąka Valley in Western Tatra Mts (19), 13 samples of clay-sandy deposits were collected from all ramparts of terminal and lateral moraines (Fig. 1–7) and patches of ground moraine (Fig. 1, 2 and 7) formed during the Last Glaciation (Vistulian, Wurm). Samples were dated using thermoluminescence (TL) method in the Thermoluminescence Laboratory, Institute of the Earth Sciences of the Maria Curie-Skłodowska University of Lublin. Obtained data were classed within 2 periods, 30–20 ka and 19–16 ka (Fig. 1 and 7). The older dates seem to be connected with deposits of the I Mała Łąka Phase – the maximum extent of glaciers during the Last Glaciation. The younger dates show the age of deposits from the next to maximum stage of glaciers development in the Western Tatra Mts - the II Mała Łąka Phase. These phases are separated from each other by the I Wielka Polana Interphase. Warming after the II Mała Łąka Phase is defined as a II Wielka Polana Interphase. The youngest development of glaciers was during the Stawki – Na Wyżnej Phase, corresponding with the Late Glacial/Early Holocene Pięć Stawów Polskich Phase in the High Tatra Mts. TL dates of glacial deposits preserved in the Mała Ląka Valley show that maximum development of glaciers in the Tatra Mts during the Last Glaciation (30–25 ka) was a prelude to the maximum development of Scandinavian ice-cap in the Polish Lowland (20 ka) during this glaciation.