Tectonic triggering of slump sheets in the Upper Cretaceous carbonate succession of the Porto Selvaggio area (Salento peninsula, southern Italy): Synsedimentary tectonics in the Apulian Carbonate Platform

Seismites from a well core of palustrine deposits as a tool for reconstructing the palaeoseismic history of a fault

“…Slides are less frequent in palustrine-lacustrine environments with very low-angle slopes, and their occurrence in these settings is usually related with an exogenic trigger (like a seismic shock). This interpretation is common to many works on seismic-induced slumps and slides in lacustrine successions Marco, 2011, 2013) and other low-angle slope environments (Field et al, 1982;Bhattacharya and Bandyopadhyay, 1998;Mastrogiacomo et al, 2012;Rossetti and Santos, 2003;Spalluto et al, 2007). Nevertheless, in some cases, loss of shear strength can be also induced by high sedimentation rates, overloading, unequal loading processes (as a deltaic setting), the slumping process occurring without any trigger mechanism external to the sedimentary environment.…”

Deformed cross-stratified deposits in the Early Pleistocene tidally-dominated Catanzaro strait-fill succession, Calabrian Arc (Southern Italy): Triggering mechanisms and environmental significance

“…Furthermore, external trigger agents such as seismic shocks are not able to induce liquefaction during the migration of foreset laminae or involving the upper part of foreset lamina, since this mechanism is not reliable in terms of time of recurrence. However the synsedimentary character of the observed SSDSs allows us to exclude the occurrences of collapses (slides and slumps) induced by tectonic tilting or earthquakes (Mastrogiacomo et al, 2012). Other collapses can be related to the karstic processes in the substrate (see examples of submarine synsedimentary collapses in Moretti et al, 2011) but we do not observe the typical localized and mainly circular morphologies that denote this kind of SSDSs.…”

Did Adria rotate relative to Africa?

“…It mostly consists of upper Campanian chalky limestones (∼ 78-72 Ma), slightly dipping to the SE, overlying subhorizontal shallow marine limestones and dolomites (Reina and Luperto-Sinni, 1994a). According to Mastrogiacomo et al (2012) chalky limestones sampled in this study formed in an intraplatform basin and record the evidence of a synsedimentary tectonic activity, as shown by the occurrence of two horizons of soft-sediment deformation structures (slumps). Out of the 52 demagnetized specimens, 48 yielded interpretable diagrams for the calculation of the ChRMs (Fig.…”