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Nummulitids, lepidocyclinids and strontium isotope stratigraphy of the Porto Badisco Calcarenite (Salento Peninsula, southern Italy); implications for the biostratigraphy and paleobiogeography of Oligocene larger benthic Foraminifera

Mariano Parente and Gyorgy Less
Nummulitids, lepidocyclinids and strontium isotope stratigraphy of the Porto Badisco Calcarenite (Salento Peninsula, southern Italy); implications for the biostratigraphy and paleobiogeography of Oligocene larger benthic Foraminifera
Italian Journal of Geosciences (June 2019) 138 (2): 239-261

Abstract

The Oligocene Porto Badisco Calcarenite (Apulian Carbonate Platform, southern Italy) contains very rich and diverse assemblages of larger benthic foraminifera. In this paper we provide the first comprehensive taxonomic study of Nummulitids and Lepidocyclinids, based on a biometric approach to species identification. The larger foraminiferal assemblage is dominated by Eulepidina, Heterostegina and Spiroclypeus. Nummulites, Operculina and Nephrolepidina make a subordinate but significant contribution. The concurrent range of the larger foraminiferal species present in the Porto Badisco Calcarenite, and in particular the presence of Spiroclypeus margaritatus and of Miogypsinoides complanatus-formosensis, indicates the late Oligocene Shallow Benthic Zone (SBZ) 23. The taxonomic composition of the larger foraminiferal assemblage of the Apulian Carbonate Platform is very similar to coeval assemblages of other localities of the western Tethyan realm (southern France, southern Spain, Malta, Greece), while some typical components of the SBZ 23 assemblages, like Heterostegina assilinoides and Eulepidina dilatata, are missing in more eastern areas (Turkey, India). Strontium isotope stratigraphy gives an age of 23.6 - 0.5 Ma for the lower part of the Porto Badisco Calcarenite, constraining the chronostratigraphic calibration of the SBZ 23 within the latest Chattian. This calibration further supports the correlation between the SBZ 23 of the European Basins biozonal scheme with the Te 4 stage of the East Indian Letter Classification.


ISSN: 2038-1719
EISSN: 2038-1727
Serial Title: Italian Journal of Geosciences
Serial Volume: 138
Serial Issue: 2
Title: Nummulitids, lepidocyclinids and strontium isotope stratigraphy of the Porto Badisco Calcarenite (Salento Peninsula, southern Italy); implications for the biostratigraphy and paleobiogeography of Oligocene larger benthic Foraminifera
Affiliation: Universita di Napoli Federico II, Dipartimento di Scienze della Terra, dell'Ambiente e delle Risorse, Naples, Italy
Pages: 239-261
Published: 201906
Text Language: English
Publisher: Societa Geologica Italiana, Rome, Italy
References: 114
Accession Number: 2019-063813
Categories: StratigraphyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., 3 plates, 7 tables, geol. sketch map
N40°04'60" - N40°04'60", E18°28'60" - E18°28'60"
Secondary Affiliation: University of Miskolc, HUN, Hungary
Country of Publication: Italy
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, Copyright, Societa Geologica Italiana. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2019
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