Dakar Slide Offshore Senegal, NW-Africa: Interaction of Stacked Giant Mass Wasting Events and Canyon Evolution
Acoustic data reveal giant submarine slides offshore Senegal. The most prominent slide, named Dakar Slide, shows a headwall with a length of at least 100 km in water depths of 2,000–3,100 m. The slide is situated between two canyons, the Dakar Canyon in the north and the Diola Canyon in the south. Seismic data indicate a complex interaction of mass wasting and canyon evolution during the formation of this part of the continental margin. The northern sidewall of the Dakar Slide crosses the distal part of the Dakar Canyon, which was repeatedly destroyed and filled by slide deposits. The area above the headwall does not show major mass-wasting events though the slope gradient there is significantly steeper. The Dakar Slide is underlain by multiple giant mass transport deposits reaching back to Oligocene times.
KeywordsSubmarine landslide Mass failure Canyon Seismic reflection
We thank all scientists and crew who supported data collection. The authors are thankful to Aggeliki Georgiopoulou and Jan Sverre Laberg for their reviews and constructive comments. Financial support was provided by the DFG.
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