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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 26 o . The ridges are composed of gravel and boulders. Their interpretation asdoi:10.5200/baltica.2013.26.14 fatcat:n6m6kfnk6reunktvfmusbe5pou