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The geological relationships between Sardinia and Calabria during Alpine and Hercynian times

Walter Alvarez and David H. Shimabukuro
The geological relationships between Sardinia and Calabria during Alpine and Hercynian times (in Alps and Apennines; a natural laboratory of structural geology and geodynamics; papers presented at the International meeting in honour of Gaetano Giglia and Tonino Decandia, Giovanni Capponi (editor), Michele Marroni (editor), Enrico Tavarnelli (editor) and Fernando Calamita (editor))
Italian Journal of Geosciences (June 2009) 128 (2): 257-268

Abstract

What were the geological relations between Calabria and Sardinia before the opening of the Tyrrhenian Sea? It would be premature to reach a definitive conclusion, so we consider (without reaching any conclusions) four major open questions that bear on the original geologic relationships between Sardinia and Calabria, and that are closely interconnected: (1) Was Calabria a single terrane during post-Hercynian time (Mesozoic and Cenozoic), or is it a composite terrane formed by Cenozoic collision of two subterranes, northern and southern? (2) What has the history of subduction under Calabria been? One interpretation envisions an early "Alpine", east-dipping subduction followed by a later "Apennine", west-dipping subduction; an alternative view is that only west-dipping subduction has occurred. (3) Is there a recognizable match between the Hercynian and Mesozoic geology of Sardinia and of Calabria? The Hercynian evolution of Sardinia is now generally understood, although with some open questions. That of Calabria is still poorly known, which makes it hard at this point to use a match of the Hercynian patterns to constrain a pre-Tyrrhenian terrane reconstruction, but the character of Mesozoic carbonate sequences may provide an additional constraint. (4) How was Calabria extended during its rifting away from Sardinia?


ISSN: 2038-1719
Coden: BOGIAT
Serial Title: Italian Journal of Geosciences
Serial Volume: 128
Serial Issue: 2
Title: The geological relationships between Sardinia and Calabria during Alpine and Hercynian times
Title: Alps and Apennines; a natural laboratory of structural geology and geodynamics; papers presented at the International meeting in honour of Gaetano Giglia and Tonino Decandia
Author(s): Alvarez, WalterShimabukuro, David H.
Author(s): Capponi, Giovannieditor
Author(s): Marroni, Micheleeditor
Author(s): Tavarnelli, Enricoeditor
Author(s): Calamita, Fernandoeditor
Affiliation: University of California, Berkeley, Department of Earth & Planetary Science, Berkeley, CA, United States
Pages: 257-268
Published: 200906
Text Language: English
Summary Language: Italian
Publisher: Societa Geologica Italiana, Rome, Italy
Meeting name: Alps and Apennines; a natural laboratory of structural geology and geodynamics; International meeting in honour of Gaetano Giglia and Tonino Decandia
Meeting location: Pisa, ITA, Italy
Meeting date: 20071025Oct. 25-26, 2007
References: 59
Accession Number: 2011-009254
Categories: Solid-earth geophysicsStratigraphy
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch maps
N38°00'00" - N40°10'00", E15°45'00" - E17°00'00"
N38°49'60" - N41°30'00", E08°15'00" - E09°45'00"
Secondary Affiliation: Osservatorio Geologico di Coldigioco, ITA, Italy
Country of Publication: Italy
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 201106
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