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- Title
The transpressive deformation zone of the Ranzano Formation along the River Secchia near Castellarano (Northern Apennines).
- Authors
Balocchi, Paolo; Santagata, Tommaso
- Abstract
This article deals with the geological-structural analysis of the rock outcrops along the River Secchia near Castellarano (northern Italy). The outcrops studied belong to the Ranzano Formation (Epiligurian Succession), which in this area represents the lower part of the arenaceous-conglomeratic facies of the Val Pessola Member. From a tectonic viewpoint, the outcrops are located within an area comprised between the Viano syncline to the west and the Montegibbio monocline to the east. The brittle tectonic structures are found along a fault system where the eastern block is lifted compared with the lower western block (Viano syncline). Geological-structural survey of the area allowed the presence of structures, known as deformation bands, to be recognised. They are small millimetre-scale faults present in arenaceous rock types, where fracturing of the grains takes place by shearing. During the survey, structures of different mesofaults were also identified and grouped together into three different families. These structures were analysed according to the geometric method of Anderson's acute dihedral, since it was not possible to detect the presence of kinematic indicators useful for defining the movement of the mesofaults. The data collected show that the area along the River Secchia, where the Epiligurian units emerged, was affected by various deformation events; three of the compressive type and one of the extension type, which generated the different families of tectonic structures.
- Subjects
OUTCROPS (Geology); SYNCLINES; DEFORMATION of surfaces; STRUCTURAL geology; PLATE tectonics
- Publication
Atti della Società dei Naturalisti e Matematici di Modena, 2018, Vol 149, p57
- ISSN
0365-7027
- Publication type
Article