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Geological map of the eastern sector of the Gorgoglione Basin (southern Italy)

Paolo Giannandrea, Francesco Loiacono, Patrizia Maiorano, Fabrizio Lirer and Diego Puglisi
Geological map of the eastern sector of the Gorgoglione Basin (southern Italy)
Italian Journal of Geosciences (February 2016) 135 (1): 120-141

Abstract

In this paper we report new stratigraphic data related to a new geological map of the Miocene Gorgoglione Basin of southern Italy, traditionally considered as a piggy-back or wedge-top basin filled by a turbidite-like succession. Well exposed outcrops in the study area (eastern sector of the basin) show four unconformities in the Castelmezzano-Pietrapertosa area. Two of these unconformities pass to paraconformities southeastward, in the Cirigliano-Gorgoglione area. Based on new stratigraphic data the "succession of the Gorgoglione Flysch" can be divided into different informal units: Val Miletta formation and Gorgoglione supersynthem. The latter can be subdivided into the Cirigliano and Castelmezzano synthems. The previously established Cirigliano synthem is here divided into three subsynthems. The lowermost sediments of the Gorgoglione Flysch on the eastern sectors correspond to a complex unit (Val Miletta formation) including Numidian-like quartzarenites, Gorgoglione-like sandstones, and, at the top of the formation, an olistostrome of varicoloured clays, belonging to the Argille Variegate Group. The stratigraphic analyses and the biostratigraphic results based on calcareous plankton assemblage, improve the reconstruction of the geometries of the sedimentary bodies and the time-space facies evolution of the synthems. Sedimentologic and petrographic characters of the upper part of the Castelmezzano synthem show a clear fining and thinning upward trend. Medium- and fine-grained arenites, varying in composition from quartz sandstones to siltstones and shales, are locally marked by abundant planktonic foraminifera and are interpreted as contourites. Moreover, the relationships between tectonics and sedimentation are analyzed. The data are used to propose a scheme of the Burdigalian to Tortonian tectono-stratigraphic evolution of the eastern sector of the basin.


ISSN: 2038-1719
EISSN: 2038-1727
Coden: BOGIAT
Serial Title: Italian Journal of Geosciences
Serial Volume: 135
Serial Issue: 1
Title: Geological map of the eastern sector of the Gorgoglione Basin (southern Italy)
Affiliation: Universita della Basilicata, Dipartimento di Scienze, Potenza, Italy
Pages: 120-141
Published: 201602
Text Language: English
Publisher: Societa Geologica Italiana, Rome, Italy
References: 95
Accession Number: 2016-016629
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, geol. sketch maps
N40°00'00" - N41°30'00", E13°45'00" - E15°45'00"
Secondary Affiliation: Universita di Bari Aldo Moro, ITA, ItalyIstituto Ambiente Marino Costiero, ITA, ItalyUniversita di Catania, ITA, Italy
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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