A large sedimentary phase occurred throughout Sicily and a Terravecchia layer was formed (early Tortonian 11.2 Ma to Messinian 3 Ma). It is not continuous that it shows no discontinuity in the basin (Butler et al., 1999). Phase distribution within the formation suggests that movement of the stretching plate and migration to the north of the sedimentary basin dominate the deposition factor (Giunta et al., 2000). Shale and mar are the most abundant sediments found in Terravechhia and are often succeeded by marine sediments and clay on the formation.
The geological history of Sicily is long and complicated derived from Mesozoic. The features that make up the Mediterranean today are the result of two main processes: subduction of the African plate beneath the Eurasian plate and closure of the Mediterranean. Carbonate sediments and sediments from the sea floor sediments of the Tethys Sea (late Triassic to early Cretaceous) constitute the oldest exposed rocks in the western part of Sicily. During this period, the structural composition of this region is mainly determined by the movement of the moving plate, and as a result, not only the form of the fault block, the surface and the mantle structure are alternately arranged, but also an east-west normal fault is formed .
Structural geology is a subfield of geology that focuses on geological formation research. Plate tectonics research is a form of structural geology. Structural geologists establish relationships between similar strata, explore the conditions that must exist when forming various geological features, and understand ongoing geological processes such as mountain formation can do.
Structural geology is the process leading to the formation of the geological structure and the study of the influence of these structures on the rock. Structural geology is a diverse range of sizes ranging from microscopic (eg early wrinkle traces after multiple deformation events) to large enough to spread to the Earth (eg the mid-ocean ridge) Includes structural features.