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R. Catalano et al. j Tectonophysics 260 (1996) 291-323 299

overlain by the Lower Miocene deposits of the Nu- and 7) is the western structural prolongation of the
midian Aysch (Fig. 5), a foredeep succession known Calabrian are (Haccard et al., 1972; Amadio Morelli
to extend from North Africa to the southem Apen- et al., 1976). This belt (not thicker than 2 km)
nines and well exposed in centrai and eastem Sicily. consists of a group of Hercynian crystalline units
with a thin or no Mesozoic cover (Duée, 1969;
5. Main tectonic domains Ogniben, 1969). In the three highest major nappes
(Amodio Morelli et al., 1976), the Paleozoic-Meso-
5.1. The chain zoic substrate is overlain by uppermost Oligocene-
Lower Miocene terrigenous deposits (Stilo-Capo
5.1.1. The Peloritani-Kabylian belt d'Orlando Formation, Bonardi et al., 1980). The
The Peloritani edifice exposed in northeastem crystalline units are overlying a wedge of thin-
skinned thrust sheets consisting of very thin Paleo-
Sicily (Nebrodi and Peloritani Mountains, Figs. 2 zoic crystalline basement covered by uppermost Tri-

tn_n~r Carbonate TS SìcanìanTS

Palermo Mountains Eraclea

A

Sicani~l1 T$ Out~r Carpgnate TS

-4~ o 10km

~
CJ

Fig. 8. lnterpretative geologie sections crossing western and centrai Sicily. l = Tertiary foreland and piggy-back deformed deposits;
2 =Gela Thrust System (internai structures not defined); 3 = Sicilide and Numidian Flysch Units (Upper Mesozoic-Lower Tertiary);
4 = Mesozoic basinai facies; 5 = Mesozoic platform carbonate and transition to basinal facies; 6 = Permo-Triassic siliciclastics and

carbonates (Lercara ailochthon); 7 = basement. SC = Saccense domain-derived thrusts; SI= Sicanian domain-derived thrusts; TP =

Trapanese domain-derived thrusts; 1M= Imerese domain-derived thrusts; PA = Panormide domain-derived thrusts; GE TS =Gela Thrust

System. ~ = major transpressive fault planes. Geometry of deepest structures inferred.