Low-sea-level emplacement of a very large Late Pleistocene ‘megaturbidite’ in the western Mediterranean Sea

Control of sedimentation by active tectonics, glaciation and contourite-depositing currents in Endurance Basin, South Georgia

“…Canyon and on the Porcupine slope (Øvrebø et al, 2006;Voigt et al, 2013). We propose that this process may pre-condition the down-current slope to failure via increased sedimentation of fine material and possible undercutting of the deposited material by the adjacent current stream, in a manner similar to that suggested for the Rockall Bank Mass et al, 1995; Øvrebø et al, 2006); changes sediment provenance (Rothwell et al, 1998;Hemming, 2004); porosity and density variation (Goff et al, 2004);…”

An Exploratory Modelling Study on Late Pleistocene Mega-Tsunamis Triggered By Giant Submarine Landslides in the Mediterranean

“…The global peak energy is 8.4 × 10 14 J (0.2 Megatons). When compared with the gap of gravitational potential energy in the prescribed motion (3.4 × 10 16 J, from Eq. 7), the conversion factor (referred to the peak) is 2.8%, within the range of usual values found in literature (e.g.…”

δ13Corgchemostratigraphy of the Permian‐Triassic boundary in the Maitai Group, New Zealand: Evidence for high‐latitudinal methane release

“…Paull et al (1996), Rothwell et al (1998), and Nisbet & Piper (1998) document large-scale submarine slides and associated isotopic excursions toward 13 Cdepleted values in late Quaternary sediments, which they interpret as catastrophic methane release after slope failure. These slumps may have been triggered by lowering of hydrostatic pressure due to sea-level low-stand during glacial maxima, resulting in destabilisation of methane clathrates.…”

“…Following this scenario, several "clathrate-burps" could have provided the volume of isotopically depleted methane carbon to the atmosphere (>1 X 10 18 g carbon; Dickens et al 1995) to produce a shift in die global isotopic signature. This mechanism has been proposed for the late Pleistocene (20 000 yr ago) after emplacement of a megaturbidite and associated methane release (Rothwell et al 1998).…”