A form of underwater mass movement. ‘Earthquakes are among the most frequently suggested triggering mechanisms for submarine slides…sliding in various forms is a major agent in the evolution of passive continental margin morphology’ (Bugge et al. (1987) Geo-Marine Letts 7). See Yamamoto et al. (2007) Island Arc 16, 4; and Dawson and Stewart (2007) PPG 31, 6 on tsunamis generated by submarine slides.