Submarine eskers preserved on Adler Grund, south-western Baltic Sea.

Feldens, Peter, Diesing, Markus, Wilken, Dennis and Schwarzer, Klaus (2013) Submarine eskers preserved on Adler Grund, south-western Baltic Sea. Baltica, 26 (2). pp. 137-144. DOI 10.5200/baltica.2013.26.14.

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Abstract

The position of offshore ice margins, especially in the Baltic Sea, is poorly known. Based on hydroacoustic surveys, we mapped a field of submarine eskers on the seafloor of the shoal Adler Grund, southwestern Baltic Sea. The eskers comprise discontinuous, branching ridge structures with zigzag-shaped crests. These features are elevated up to 7 m above the surrounding seafloor with slope angles approaching 26o. The ridges are composed of gravel and boulders. Their interpretation as glacio-tectonic features is unlikely due to branching ridge crests and a continuous reflector at the base of several ridges. Based on their morphology and distribution, the ridges are interpreted as concertina eskers formed by meltwater outbursts close to an ice margin. Their good state of preservation indicates that the eskers were most likely formed during the last advance of the Weichselian glaciation across the study region.

Document Type: Article
Additional Information: Times Cited: 0 Feldens, Peter Diesing, Markus Wilken, Dennis Schwarzer, Klaus
Keywords: Multibeam echo sounder; Submarine esker; Adler Grund; Baltic Sea
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.5200/baltica.2013.26.14
ISSN: 0067-3064
Projects: Future Ocean
Date Deposited: 08 Jul 2014 09:11
Last Modified: 16 Jul 2019 10:43
URI: http://oceanrep.geomar.de/id/eprint/24911

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