The ~ 200 km-wide Labrador continental shelf consists of a series of shallow banks and intervening cross-shelf troughs (Fig. 1b). Glacial reconstructions suggest that the banks were occupied by slow-flowing ice and the troughs by ice-streams during several Quaternary glaciations (Dyke et al. 2002; Josenhans et al. 1986; Margold et al. 2015). On the continental slope offshore of the Makkovik Bank - southern Hopedale Saddle region, several submarine canyons and interfluves with numerous sediment destabilisation features are visible in multibeam data (Fig. 1a).