Computer Science
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007e%26psl.258..605h&link_type=abstract
Earth and Planetary Science Letters, Volume 258, Issue 3-4, p. 605-618.
Computer Science
8
Scientific paper
Submarine slides have been instrumental in shaping the Late Neogene NE Atlantic continental margin. We document a margin setting north of 70°N capable of generating recurrent huge Pleistocene mass-movements. The 1.0 0.2 Ma old Bjørnøya Fan Slide Complex includes three buried mega-slides, which have left scars containing up to 500 m-thick debris units. The two largest slides may have had a retrogressive development, cover areas of the order of ˜ 120 × 103 km2, and involved ˜ 25 × 103 km3 of sediments. Thus, the failures involved an order of magnitude more sediment than the Storegga Slide, the world's largest exposed slide. The mega-slides occurred during the Northern Hemisphere Glaciations, characterized by greatly enhanced deposition rates leading to the construction of the 3-km-thick Bjørnøya Trough Mouth Fan that progressively loaded a softer Miocene Oligocene substratum. This setting induced excess pore pressure and sediment instability, conditions favorable for sliding. External trigger mechanisms, such as earthquakes, may have facilitated the mass-wasting process.
Eldholm Olav
Faleide Jan Inge
Oline Hjelstuen Berit
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