Iceberg ploughmarks are produced when the keels of drifting icebergs impinge upon and cut into seafloor sediments. They are common landforms of high-latitude shelves and fjords, especially in water shallower than about 500 m, where they are easily detected using modern multibeam echo-sounding and earlier side-scan sonar systems (e.g. Lien 1983; Dowdeswell et al. 1993). In addition, similar buried morphological features have been identified within Quaternary sediments on palaeo-shelves, imaged using 3-dimensional seismic methods (e.g. Andreassen et al. 2007; Dowdeswell & Ottesen 2013).