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302 R. Catalano et al./ Tectonophysics 260 (1996) 291-323
NW SE
l
.w
~
.w
Ul
2
Fig. Il. Kabylian-Calabrian belt. The seismic section shows, from the top, some thin layered (basinal) thrust wedges forming a multiduplex
structure (Th) with its roof complex (CT). 1t overlies thick crystalline thrust sheets (KT) overthrusting in tum platform imbricates (Tp)
formed later. Key: PP - Plio-Pleistocene deposits; Cf- terrigenous deposits; Tb - top of the basinal carbonates; Tp - top of the platform
carbonates; KT - crystalline units.
Western Bank southeastwards to the Egadi Islands (2al) The Sicilide TS is composed of decollement
and eastwards to the northwestern Sicily offshore nappes generally known as Sicilide Units (Ogniben,
(Figs. 2 and 9); 1960). The sedimentary successions characterized by
Upper Jurassic-Oligocene basinal carbonates and
- an outer element outcropping in southern Sicily sandy mudstones (Monte Soro Unit and Variegated
and occurring on the Adventure Plateau and south- Clays Auct., Fig. 5) also include Upper Oligocene-
western Sicily offshore (Figs. 2 and 9). Lower Miocene terrigenous turbiditic successions de-
tached from their substrate. The originai substrate
Each element contains a number of genetically (oceanic crust?) is not known; the Sicilide TS are
related thrust systems (sensu Boyer and Elliot, 1982, believed to have been emplaced, during early
here called TS). These tectonic elements appear to be Miocene, on top of the more external carbonate units
continuous and correlatable from land to sea; the (Wezel, 1974; Giunta, 1985). The Sicilide TS reaches
Neogene thrust fronts (partly buried on land) can be its greatest thickness in eastern Sicily where it has
traced to the offshore structures, together assuming a been preserved in a wide depression of the chain
generai arcuate and festoon-like trend (Figs. l and (Bianchi et al., 1989). In western Sicily, the Sicilide
9). terrains (mainly marly limestones and resedimented
volcanoclastics) generally overthrust the Numidian
(2a) The inner tectonic element. This element Flysch slices and are unconformably covered by
(Fig. 9) includes tectonic units emplaced essentially upper Tortonian deposits (Fig. 8). Along the south-
during the Miocene. The following major thrust sys-
tems can be recognized on land:
