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Dakar Slide Offshore Senegal, NW-Africa: Interaction of Stacked Giant Mass Wasting Events and Canyon Evolution

  • Mathias MeyerEmail author
  • Jacob Geersen
  • Sebastian Krastel
  • Tilmann Schwenk
  • Daniel Winkelmann
Conference paper
Part of the Advances in Natural and Technological Hazards Research book series (NTHR, volume 31)

Abstract

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.

Keywords

Submarine landslide Mass failure Canyon Seismic reflection 

Notes

Acknowledgments

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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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Mathias Meyer
    • 1
    Email author
  • Jacob Geersen
    • 1
  • Sebastian Krastel
    • 1
  • Tilmann Schwenk
    • 2
  • Daniel Winkelmann
    • 1
  1. 1.Leibniz Institute of Marine Sciences (IFM-GEOMAR)KielGermany
  2. 2.Marum and Faculty of GeosciencesBremen UniversityBremenGermany

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