Abstract
Giant submarine landslide triggered by Paleocene mantle plume activity in the North Atlantic
Highlights
Submarine landslides are the largest mass movements known on Earth and are important seascape modifiers, creating some of the largest single-event deposits known (e.g., Calvès et al, 2015)
The Halibut Slide is the largest epicontinen- region is located adjacent to these faults, lying tal submarine landslide known on Earth, and ~50 km east of the Great Glen Fault Zone and its emplacement is one of the most significant 100 km north of the Highland Boundary Fault stratigraphic events within the geological his- Zone (Figs. 1, 3, and 4)
Paleocene plume- fault displacement would be required to accurelated uplift affecting the Scottish mainland mulate 1 km of slip between 64 Ma to 62 Ma and the Moray Firth (Nadin and Kusznir, 1996)
Summary
Submarine landslides are the largest mass movements known on Earth and are important seascape modifiers, creating some of the largest single-event deposits known (e.g., Calvès et al, 2015). Cenozoic fault reactivation within the Moray Firth has been linked to North Atlantic tectonism (e.g., Underhill, 1991). Paleocene sand-rich intervals within the Maureen, Lista, and Sele Formations of the central North Sea Basin have been related to episodic hinterland uplift caused by plume activity in the North Atlantic (White and Lovell, 1997; Mudge and Jones, 2004). The oldest of these intervals, the ‘Maureen Reworked Unit’ (MRU), overlies the Intra-Danian unconformity at 62.7 Ma (Mudge, 2015). The MRU is concurrent with some of the earliest volcanism in the North Atlantic, such as the British-Irish Paleogene Igneous Province at 63.2 ± 0.6 Ma (Wilkinson et al, 2016)
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