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The Crotone Megalandslide, southern Italy: Architecture, timing and tectonic control

2018; Nature Portfolio; Volume: 8; Issue: 1 Linguagem: Inglês

10.1038/s41598-018-26266-y

2045-2322

Massimo Zecchin, F. Accaino, Silvia Ceramicola, Dario Civile, Salvatore Critelli, Cristina Da Lio, Giacomo Mangano, Giacomo Prosser, Pietro Teatini, Luigi Tosi,

Landslides and related hazards

Abstract Large-scale submarine gravitational land movements involving even more than 1,000 m thick sedimentary successions are known as megalandslides. We prove the existence of large-scale gravitational phenomena off the Crotone Basin, a forearc basin located on the Ionian side of Calabria (southern Italy), by seismic, morpho-bathymetric and well data. Our study reveals that the Crotone Megalandslide started moving between Late Zanclean and Early Piacenzian and was triggered by a contractional tectonic event leading to the basin inversion. Seaward gliding of the megalandslide continued until roughly Late Gelasian, and then resumed since Middle Pleistocene with a modest rate. Interestingly, the onshore part of the basin does not show a gravity-driven deformation comparable to that observed in the marine area, and this peculiar evidence allows some speculations on the origin of the megalandslide.