Soft-sediment deformation structures in seismically affected deep-sea Miocene turbidites (Cilento Basin, southern Italy)
Journal Title: Geologos - Year 2014, Vol 20, Issue 2
Abstract
Soft-sediment deformation structures (SSDS) are widespread in the upper part of the S. Mauro Formation (Cilento Group, Middle-Late Miocene). In the sediments form a marine turbidite succession that outcrops along the sea shore. The succession is represented mainly by thick and very thick, massive, coarse-grained sandstones, deposited by rapid sedimentation of high-density turbidity currents. The most common SSDS are short pillars, dishes, sedimentary sills and convolutions. They occur mostly in the upper parts of sandstone beds. Vertical tubes of 4-5 cm in diameter and up to 50 cm long constitute the most striking structures. They begin in the middle part of sandstone beds, which are basically massive or contain faint dish structures. These tubes can bifurcate upwards and/or pass into bedding-parallel veins or dikes. The vertical tubes sometimes form sand volcanoes on the then sedimentary surface. The SSDS are interpreted as the result of earthquake-triggered liquefaction and/or fluidisation of the turbidites that were affected by the seismic shocks. This implies that the deformed layers should be considered as seismites.
Authors and Affiliations
Alessio Valente, Andrzej Ślączka, Giuseppe Cavuoto
Keywords
Related Articles
- EP ID EP165692
- DOI 10.2478/logos-2014-0009
- Views 201
- Downloads 0
Peat decomposition - shaping factors, significance in environmental studies and methods of determination; a literature review
A review of literature data on the degree of peat decomposition – an important parameter that yields data on environmental conditions during the peat-forming process, i.e., humidity of the mire surface, is presented. A d...
Analyses of permeability and porosity of sedimentary rocks in terms of unconventional geothermal resource explorations in Poland
Petrophysical investigations are fundamental to natural resource exploration. In order to recognise the geothermal potential of sedimentary rocks in central Poland, 259 samples were collected from prospective deep-lying...
Seismic and non-seismic soft-sediment deformation structures in the Proterozoic Bhander Limestone, central India
Numerous soft-sediment deformation structures occur within the Proterozoic Bhander Limestone of an intracratonic sag basin in a 750 m long section along the Thomas River, near Maihar, central India. Part of these deforma...
Analysis of lithofacies cyclicity in the Miocene Coal Complex of the Bełchatów lignite deposit, southcentral Poland
Markov chain analysis was applied to studies of cyclic sedimentation in the Coal Complex of the Bełchatów mining field (part of the Bełchatów lignite deposit). The majority of ambiguous results of statistical testing tha...
Assessment of metal concentrations in tap-water – from source to the tap: a case study from Szczecin, Poland
The concentrations of Al, As, Cd, Cu, Pb, Zn, Ni, Fe and Mn were determined in June 2010 for 100 tap-water samples, collected directly at consumers in the older part of the city of Szczecin (Poland). Increased concentrat...