Gordo megabed: a possible seismite in a tortonian submarine fan, tabernas basin, province almeria, southeast spain

Submarine slide blocks and associated soft-sediment deformation in deep-water basins: A review

“…Kvalstad et al (2005) recognised in Norway that a two-layered structure is associated with the build-up of pore pressure near the seafloor, thus predisposing slope strata to fail. If near-seafloor lithology is more homogeneous, submarine slides will be devoid of blocks, more recurrent, and alternating with turbidite successions such as those of SE Japan and SE Spain (Kleverlaan, 1987;Dabrio, 1990;Haughton, 1994Haughton, , 2000Strasser et al, 2011;Alves et al, 2014b). A second pre-conditioning factor of importance is the presence of sandy material at the base of large blocks (Alves and Lourenço, 2010).…”

Hybrid sediment gravity flow deposits – Classification, origin and significance

“…The first bed type comprises debrite-turbidite couplets that tend to occur as isolated, unusually large-volume event beds, often on the floors of confined basins or fjords (Kleverlaan, 1987;Seguret et al, 1984). Some have been related to seismic triggering (and referred to as seismoturbidites although they are not wholly produced by turbidity currents; Mutti et al, 1984;Bouma, 1987;Syvitski and Schafer, 1996).…”

“…The stacking of turbidite sand on debrite can be related to surface transformation due to reverse shear whereby mixing at the front of a debris flow produces a trailing turbulent wake as illustrated experimentally by Hampton (1972). Alternatively, an initial cohesive failure may trigger a subsequent sand failure by breaching or setting up seiches in confined basins (Kleverlaan, 1987). Debrite-turbidite 'megabeds' tend to record rare large magnitude events against a background of 'normal' gravity current deposition (Mutti et al, 1984;Haughton, 2000).…”

The life cycle of seismite research

“…The original and early researchers (Seilacher, 1969(Seilacher, , 1984Spalletta & Vai, 1984;Kleverlaan, 1987) did not really provide clues that would nowadays be considered as acceptable or convincing.…”