Geology of the High Sillaro Valley (Northern Apennines of Italy)

We map the High Sillaro Valley, in the Northern Apennines of Italy. Here the Ligurian wedge overthrust the foredeep deposits of the Marnoso Arenacea formation - MA. The overthrusting occurred through a shear zone with components derived from the frontal part of the Ligurian wedge and interpreted as...

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Bibliographic Details
Published in:Journal of maps 2020-12, Vol.16 (2), p.805-817
Main Authors: Panini, Filippo, Bettelli, Giuseppe, Carlini, Mirko, Fioroni, Chiara, Nirta, Giuseppe, Remitti, Francesca
Format: Article
Language:English
Subjects:
Alliances
Geology
Miocene
mélange
Northern Apennines
orogenic wedge
Shear zone
Sillaro Valley
Tectonics
Valleys
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Summary:We map the High Sillaro Valley, in the Northern Apennines of Italy. Here the Ligurian wedge overthrust the foredeep deposits of the Marnoso Arenacea formation - MA. The overthrusting occurred through a shear zone with components derived from the frontal part of the Ligurian wedge and interpreted as a tectonic mélange (Sestola-Vidiciatico Tectonic unit - SVU) here subdivided into two different subunits structurally independent one from the other. In the area, the Visignano chaotic body (VIS) constitutes an intercalation within the Serravallian-Tortonian MA and derives, as the SVU, from the frontal part of the Ligurian wedge. We performed a detailed investigation of the components of the VIS that helps to better define the architecture of the frontal part of the Ligurian wedge and to constrain the timing of the deformation phases affecting this portion of the Northern Apennines during the middle-late Miocene.
ISSN:1744-5647
1744-5647
DOI:10.1080/17445647.2020.1832926