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A comparative case study of subglacial bedforms in northern Lithuania and south-eastern Iceland

Baltrūnas, V.; Waller, R. I.; Kazakauskas, V.; Paškauskas, S.; Katinas, V.

A comparative case study of subglacial bedforms in northern Lithuania and south-eastern Iceland Thumbnail


Authors

V. Baltrūnas

V. Kazakauskas

S. Paškauskas

V. Katinas



Abstract

This paper aims to compare the dynamics of the subglacial environment as determined by an analysis of the structure and sedimentology of both Pleistocene and modern glacial deposits. Investigations focused on subglacial sediments in areas of streamlined relief in northern Lithuania (Ruopiškiai megascale subglacial lineations - MSGL) and south-eastern Iceland (drumlinised terrain exposed by the recent retreat of Skeiðarárjökull glacier). Sedimentological analyses involved granulometry, till macrofabrics, and the anisotropy of magnetic susceptibility (AMS) of micro-clasts. Comparative investigations of subglacial bedforms exposed at Ruopiškiai and Skeiðarárjökull highlighted differences in their formation and post-genetic transformation. In both cases, their initiation was associated with ice advance and subglacial sediment deformation. However, subsequent dynamics were different.

Journal Article Type Article
Acceptance Date Nov 4, 2014
Publication Date Dec 1, 2014
Publicly Available Date Mar 29, 2024
Journal Baltica
Print ISSN 0067-3064
Electronic ISSN 1648-858X
Publisher Nature Research Centre
Peer Reviewed Peer Reviewed
Pages 75 -92
DOI https://doi.org/10.5200/baltica.2014.27.18
Keywords subglacial environment, drumlin, till, magnetic susceptibility
Publisher URL https://doi.org/10.5200/baltica.2014.27.18

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