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Article

Plio–Quaternary Structural Evolution of the Outer Sector of the Marche Apennines South of the Conero Promontory, Italy

1
Via Selvelli, 6, 61032 Fano, Italy
2
Department of Earth Sciences, University of Turin, via Valperga Caluso, 35, 10125 Torino, Italy
3
School of Science and Technology, Geology Division, University of Camerino, via Gentile III da Varano, 62032 Camerino, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Jesus Martinez-Frias, Domenico Liotta, Giancarlo Molli and Angelo Cipriani
Geosciences 2021, 11(5), 184; https://doi.org/10.3390/geosciences11050184
Received: 30 January 2021 / Revised: 16 April 2021 / Accepted: 20 April 2021 / Published: 24 April 2021
Some new results and preliminary remarks about the Plio–Quaternary structural and evolutionary characteristics of the outer Marche Apennines south in the Conero promontory are presented in this study. The present analysis is based on several subsurface seismic reflection profiles and well data, kindly provided by ENI S.p.A. and available on the VIDEPI list, together with surface geologic–stratigraphic knowledge of Plio–Quaternary evolution from the literature. Examples of negative vs. positive reactivation of inherited structures in fold and thrust belts are highlighted. Here, we present an example from the external domain of the Marche Apennines, which displays interesting reactivation examples from the subsurface geology explored. The study area shows significant evolutionary differences with respect to the northern sector of the Marche region previously investigated by the same research group. The areal distribution of the main structures changes north and south of the ENE–WSW oriented discontinuity close to the Conero promontory. Based on the old tripartite classification of the Pliocene, the results of this work suggest a strong differential subsidence with extension occurring during the Early Pliocene and principal compressive deformation starting from the Middle Pliocene and decreasing or ceasing during the Quaternary. The main structure in this area is the NNW–SSE Coastal Structure, which is composed of E-vergent shallow thrusts and high-angle deep-seated normal faults underneath. An important right-lateral strike–slip component along this feature is also suggested, which is compatible with the principal NNE–SSW shortening direction. As mentioned, the area is largely characterized by tectonic inversion. Starting from Middle Pliocene, most of the Early Pliocene normal faults became E-vergent thrusts. View Full-Text
Keywords: Plio–Quaternary evolution; outer Marche Apennines; seismic reflection profiles; tectonic inversion; Coastal Structure; extensional and contractional deformation Plio–Quaternary evolution; outer Marche Apennines; seismic reflection profiles; tectonic inversion; Coastal Structure; extensional and contractional deformation
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MDPI and ACS Style

Costa, M.; Chicco, J.; Invernizzi, C.; Teloni, S.; Pierantoni, P.P. Plio–Quaternary Structural Evolution of the Outer Sector of the Marche Apennines South of the Conero Promontory, Italy. Geosciences 2021, 11, 184. https://doi.org/10.3390/geosciences11050184

AMA Style

Costa M, Chicco J, Invernizzi C, Teloni S, Pierantoni PP. Plio–Quaternary Structural Evolution of the Outer Sector of the Marche Apennines South of the Conero Promontory, Italy. Geosciences. 2021; 11(5):184. https://doi.org/10.3390/geosciences11050184

Chicago/Turabian Style

Costa, Mario, Jessica Chicco, Chiara Invernizzi, Simone Teloni, and Pietro Paolo Pierantoni. 2021. "Plio–Quaternary Structural Evolution of the Outer Sector of the Marche Apennines South of the Conero Promontory, Italy" Geosciences 11, no. 5: 184. https://doi.org/10.3390/geosciences11050184

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