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Evidence of active tectonics in southern Calabria (Italy) by geomorphic analysis; the examples of the Catona and Petrace rivers

Claudia Pirrotta, Maria Serafina Barbano and Carmelo Monaco
Evidence of active tectonics in southern Calabria (Italy) by geomorphic analysis; the examples of the Catona and Petrace rivers
Italian Journal of Geosciences (February 2016) 135 (1): 142-156

Abstract

This work integrates new detailed geomorphic analyses of the Petrace and Catona fluvial network (southern Calabria) with structural geology data in order to characterize the activity of the fault systems intercepting the fluvial basins and to constrain the seismotectonic setting of the study area. Several strong earthquakes (Maw 6.0-7.1) occurred in the last millennium in the area, which is considered among the most seismically active zones in Italy. However, the lack of instrumental data for strong historical earthquakes and the poor exposure of faulted Quaternary sediments, do not allow the easy identification of active, seismogenic faults. We mapped known faults and new minor structures, transversal and parallel to the master faults, through aerial-photo interpretation and DEM analysis. The transversal structures are minor faults and connecting faults accommodating movement between the master faults that slipped generating strong destructive historical earthquakes. The geomorphological analysis highlights markers of recent tectonic activity associated to the mapped faults. Hierarchical parameters and geomorphic indexes of the Petrace and Catona Rivers show drainage anomalies due to active tectonics and reveal the activity of the faults intercepting them. This work shows that, in southern Calabria, besides the known master faults associated with some catastrophic historical earthquakes, minor faults are active and could be sources of low magnitude seismic release. Finally, the geomorphic and geomorphological analyses allow reconstructing the evolution of the Petrace and Catona rivers and fault activity and dating to Late Pleistocene the present day Messina Strait graben configuration.


ISSN: 2038-1719
EISSN: 2038-1727
Coden: BOGIAT
Serial Title: Italian Journal of Geosciences
Serial Volume: 135
Serial Issue: 1
Title: Evidence of active tectonics in southern Calabria (Italy) by geomorphic analysis; the examples of the Catona and Petrace rivers
Affiliation: Catania University, Biological, Geological and Environmental Sciences Department, Catania, Italy
Pages: 142-156
Published: 201602
Text Language: English
Publisher: Societa Geologica Italiana, Rome, Italy
References: 80
Accession Number: 2016-016630
Categories: GeomorphologyStructural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, geol. sketch maps
N38°00'00" - N38°30'00", E15°45'00" - E16°15'00"
Country of Publication: Italy
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Societa Geologica Italiana. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201609
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