THIN SKINNED DEFORMATION AND STRUCTURAL EVOLUTION IN THE NE SEGMENT OF THE GELA NAPPE, SE SICILY

Abstract

The Gela Nappe represents the southern termination not only of thrusting on Sicily but also of compressional defor­mation in this segment of the Maghrebian orogen. The nappe, a fold-thrust complex carried on a basai detachment, involves units including a thick sequence of clays of Tortonian age, upon which rest, variably folded and faulted, Messinian evaporites. The major period of folding and thrusting oc­curred after the deposition of the Early Pliocene Trubi Fm. These units are found in the footwall to the basai thrust at the AGIP Ramacca 1 borehole. [...]