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16 F. NIGRO

AECoriolis

/'drifl

_ SE mantle uplirt
·· ____,.sud

S Egadi Fault

NNW african nadir mouvemenl

nadir sulxludion

S Egadi l'ault + NNW african subduction = Va; n.'lthr

=E Magtl3ghi- Vavilov opcning + SE Dlalt~e uplirl Vr; E Coriolis drift = k.

starting development of flower
structures in the Western

Tyrrhenian arca (Fig. 13C) and
in lhe Maghrebian 1\>rcland
(l'ig. 13G)

in NW Sicily._~-.-~-··--··llco,mrl./tlransor.l
Sicily offshorc and Sicily

Channcl. Developmcnl of E-W

trcnding 11ower structurcs in

Wcstem Sicily (Fig. 7A) and

N-S trending in Westcm

~·~rrhc•~_an(Fig, 13C) Va>Vr

1.4-0.8 Myr

(cxtcnsion)

extension in Marsili arca.
northcm Sicily coastal arca and

in Palermo Mts. (Fig. 78)

Va<Vr

Lnmsprcssion in tbc Pcloritani 0.8 Myr
arca (Fig. 8B) anù probably in (wmpression)
SW Sicily (Fig. 7C). Furlhcr

transpression in NW Sicily.

Va> Vr

transtension and dip--slip faults 0.8-0.5 Myr
devclopmcnt in tbc Pcloritani (cxtcnsion)
arca (Fig. 8C) and in Centrai

Tyrrbcni;m (Fig. 9)

Va< Vr

0.5 Myr
(compression)

trcnding tr.utsprcssion in
Sicity

Va> Vr

0.5-0 Myr
(cxtcnsion)

Nortbcm Sicily offshorc :mtl
Centr".tl Tyrrhcnian strong
(Fig. 13E). Extcnsion
in Sicily Channcl.

Va<Vr

Fig. 17. A. Velocity vectors that controlied geodynamic evolution of the Centra! Mediterranean. It is possible to solve the velocity
vectors as the resultants of African subduction-Egadi Fault movements (Va) and mantle uplift-Central Tyrrhenian opening (Vr). The
African subduction rate is very Jow with respect to the Egadi Fault rate, while the mantie uplift, as well as the Magnaghi-Vavilov basins
opening, are considered as angular velocities. B. Sequence of tectonic events related to the predominance in time of Va or Vr that
established a compressionalltranspressional or an extensional tectonic regime in the Tyrrhenian and peri-Tyrrhenian areas during the last
5 Ma. See text for explanations