Latest pleistocene glacier advances and post-younger dryas rock glacier stabilization in the Mt. Kriváň group, High Tatra Mountains, Slovakia

Zasadni, Jerzy Latest pleistocene glacier advances and post-younger dryas rock glacier stabilization in the Mt. Kriváň group, High Tatra Mountains, Slovakia / Jerzy Zasadni, Piotr Klapyta ... [et al.]. -- © 2020 Elsevier B.V. The timing of glacier disappearance and rock glacier stabilization in the highest massifs of the Carpathians is still poorly documented. In this paper, we establish the extent and chronology of the final stages of glaciation and timing of stabilization of the uppermost rock glaciers in the Tatra Mountains, which are the highest (2654 m a.s.l.), northernmost (N 49°12′), and coldest range in the Carpathians. On the base of morphostratigraphic principles, Schmidt Hammer tests and glacier equilibrium line altitude (ELA) estimation, we assigned moraines and rock glaciers in the Mt. Kriváň massif (SW part of High Tatras) to a threefold stratigraphic sequence with glacial stages/advances from older to younger: Popradské pleso (Pp), Suchá važecká I (Sv I) and Suchá važecká II (Sv II). Landforms attributed to two younger advances, Sv I and Sv II, were sampled for the purpose of cosmogenic 10Be surface exposure dating. Our data show that Pp and Sv I glacial advances occurred during the Oldest Dryas climatic downturn. The younger advance (Sv I) occurred just before the Bølling-Allerød (B/A) warming at 14.9 ± 0.4 ka, at this time small glaciers occupied lower glacial cirques in the study area. The youngest Sv II advance was characterized by rock glaciers and small debris-covered glaciers confined to the highest cirques. The mean exposure age of four relict rock glaciers of this stage is 11.1 ± 0.9 ka but individual rock glacier mean ages spanned between 11.8 and 10.4 ka. Our research results show that the youngest moraines and rock glaciers in the Tatra Mountains were formed during the Younger Dryas (YD), but the final permafrost melting and rock glacier stabilization period was delayed until the early Holocene, but no later than 10.4 ka. In high elevation cirque bottoms (up to 2120 m a.s.l.), the YD glaciers and rock glaciers readvanced across land which was ice-free as early as 14.8–14.2 ka. Thus, it is likely that during the B/A interphase, glaciers comp

In Geomorphology. -- Amsterdam : Elsevier B.V., 2020. -- ISSN 0169-555X. -- ISSN 1872-695X. -- Vol. 358 (2020), art. no. 107093 pp. [1-19]

1. skalné ľadovce 2. proces stabilizácie 3. Karpaty (pohorie) 4. Kriváň 5. články

I. Kłapyta, Piotr
II. Broś, Ewelina
III. Ivy-Ochs, Susan
IV. Świąder, Andrzej
V. Christl, Marcus
VI. Balážovičová, Lenka, Anstead, 1982-
VII. Geomorphology. -- Vol. 358 (2020), art. no. 107093 pp. [1-19]
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