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Geomorphological record and equilibrium line altitude of glaciers during the last glacial maximum in the Rodna Mountains (eastern Carpathians)

Published online by Cambridge University Press:  13 November 2020

Piotr Kłapyta*
Affiliation:
Jagiellonian University, Faculty of Geography and Geology, Institute of Geography and Spatial Management, 30-387 Krakow, Poland
Marcel Mîndrescu
Affiliation:
Geography Department, University of Suceava, 13, Universitatii st, Suceava, 720229, Romania
Jerzy Zasadni
Affiliation:
Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, 30-059 Krakow, Poland
*
*Corresponding author at: E-mail address: piotr.klapyta@uj.edu.pl (Piotr Kłapyta).

Abstract

In the eastern Carpathians the legacy of glaciation is preserved in several isolated mountain massifs. This paper presents new mapping results of glaciated valley land systems in the Rodna Mountains, the highest part of the eastern Carpathians (2303 m above seal level). In most of the glacial valleys, the maximal Pleistocene extent is marked by freshly shaped moraines, which are referred in this study as the Pietroasa glacial stage and regarded as the last glacial maximum (LGM) advance. Only in three valleys do older Şesura glacial stage moraines (pre-LGM, likely Marine Oxygen Isotope Stage 6) occur. On the basis of the geomorphological record, we reconstruct the extent, surface geometry, and equilibrium line altitude (ELA) of Pietroasa-stage glaciers. The local ELA pattern of north-exposed glaciers in the Rodna Mountains shows a rising trend towards the southeast, which suggests dominant snow-bearing winds and orographically induced precipitation from the west. This finding fits well with the dominant palaeo-wind direction inferred from other Carpathian proxies and confirms the dominance of zonal circulation pattern during the global LGM in central eastern Europe.

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Type
Research Article
Copyright
Copyright © University of Washington. Published by Cambridge University Press, 2020

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