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R. Catalano et al. /Tectonophysics 260 (1996) 291-323 301

age of continuous progressive deforrnation through- sequence thrusting that followed the earliest Miocene
out the Peloritani element and the underlying Sicilide imbrication.
Monte Soro Unit. Middle Miocene to Pliocene de-
posits (Figs. 5 and 7) seal the chain and were Recent investigations of the Cornaglia Basin-
involved together wìth their substrate in post-Mes- Western Bank sector (Figs. 2 and 9), based on
sinian out of sequence thrusting during transpres- seismostratigraphic analyses, display a structural edi-
sional movements (Ghisetti and Vezzani, 1984). fice forrned by stacked wedges of crystalline base-
ment locally calibrated by the available dredge haul
The submerged western continuation of the data, and both basin and platforrn-derived duplexes.
Peloritani belt (the so-called Kabylian-Calabrian The seismic lines show that these imbricates are
Units, Catalano et al., 1985; Torellì et al., 1985) has overlain by tightly packed terrigenous tectonic slices
already been shown to be composed of Hercynìan forrning the roof thrust (Fig. Il).
basement rock units overlain by a thick wedge of
5.1.2. The Maghrebian-Sicilian belt
deep sea arkosic turbidites of (?) Aquitanian-early The belt is forrned by severa! imbricate units
Burdigalian age (Torelli et al., 1985, 1992; Com-
pagnoni et al., 1989). The Kabylian-Calabrian Units outcropping on the Sicilian mainland and occurring
are thrust over the Sicilian-Maghrebian rocks along along its submerged northern, northwestern and
the Drepano Thrust Front (DTF, Figs. 9 and 10) southwestern extension. The following element can
where they appear to overlie Messinian forrnations. be distinguished:
We interpret the present-day setting of the Drepano
Thrust Front as the result of post-Messìnìan out-of- - an inner element developing from west to east
in north and centrai Sicily and extending from the

B ADVENTURE BANKSE

CJ-D~~·· km

li,;l - D D
l 2 3 4 56 7 8

Fig. 10. Interpretative geologica! cross sections, based on the reinterpretation of seismic profiles, from Western Bank across Egadi Islands to

Adventure Bank (modified from Catalano et al., 1993c). The figure shows from the top: l Plio-Pleistocene deposits, 2 crystalline and

sedimentary Kabylian-Calabrian equivalent units. Sicilian-Maghrebian lnner element: 3 detached and accreted flysch slices, 4 imbricates

of deep-water carbonates of internai domains, 5 platform carbonate imbricates (Panormide and Pre-Panormide Units). Sicilian-Maghrebian
Outer element: 6 platform carbonate thrusts (Trapanese and Saccense Units), overlain by the deformed Upper-Lower Miocene foreland
basin deposits 7. 8 Crystalline basement. G and C with relative numbers indicate seismic profiles crossing the geologica! sections. Dotted

squares indicate location of seismic sections illustrated in Figs. 14 and 15.