Research activities As erosion in many parts of the oceans is limited compared with runoff-driven erosion on continents, the ocean floor's topography retains useful information on the geological processes that have shaped it. My work has therefore largely focused on topographic and other data collected with various kinds of sonars. After a start studying oceanic triple junctions for my doctorate, my research has expanded to include aspects of faulting, volcanism, sedimentary and palaeoceanographic processes in a range of geological and geographical environments, as well as technical aspects of sonar. Erosion can be locally significant in some areas too, illustrated by large-scale landsliding of volcanic islands and the development of canyons in continental slopes. Research approaches taken include both interpreting new field data and numerical/analytical modelling.