02410nas a2200421   4500000000100000008004100001260002500042653003600067100002200103700001700125700002700142700001800169700002100187700001800208700002000226700002000246700002200266700001600288700001700304700001800321700001700339700001800356700002100374700002000395700002200415700001600437700001700453700001800470700001700488700001800505700002100523245014800544856005100692300001200743490000700755520120400762020002201966       2012                            d  bSpringer Netherlands10aEarth and Environmental Science1 aSebastian Krastel1 aRussell Wynn1 aAggeliki Georgiopoulou1 aJacob Geersen1 aRüdiger Henrich1 aMathias Meyer1 aTilmann Schwenk1 aYasuhiro Yamada1 aKiichiro Kawamura1 aKen Ikehara1 aYujiro Ogawa1 aRoger Urgeles1 aDavid Mosher1 aJason Chaytor1 aMichael Strasser1 aYasuhiro Yamada1 aKiichiro Kawamura1 aKen Ikehara1 aYujiro Ogawa1 aRoger Urgeles1 aDavid Mosher1 aJason Chaytor1 aMichael Strasser00aLarge-Scale Mass Wasting on the Northwest African Continental Margin: Some General Implications for Mass Wasting on Passive Continental Margins  uhttp://dx.doi.org/10.1007/978-94-007-2162-3_17  a189-1990 v313 aThe continental margin off Northwest Africa is shaped by a complex interplay of sediment transport processes, directed both downslope and alongslope. During several recent cruises, sediment transport processes between 12\textdegreeN and 29\textdegreeN off Senegal, Mauritania, and Western Sahara were investigated by means of geophysical and sedimentological methods. Sediment transport on the Northwest African continental margin operates with different rates and styles: some sections of the margin show a large concentration of upper slope canyons but no indication for significant mass wasting, whereas other sections are characterized by large-scale mass wasting with no canyons or gullies. Four mega-slides, each affecting over 20,000 km 2 of seafloor, have been identified along the continental slope off Northwest Africa. All slides are complex in morphology and show a stepped headwall pattern typical for retrogressive failure. Several buried mass transport deposits are seismically imaged beneath all near-surface slides indicating a long history of mass wasting for some sections of the margin. Two of the mega-slides show headwalls at atypically large water depths, deeper than 3,000 m.  a978-94-007-2162-3