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Late Chattian platform carbonates with benthic Foraminifera and coralline algae from the SE Iberian Plate

Telm Bover-Arnal, Carles Ferrandez-Canadell, Julio Aguirre, Mateu Esteban, Jose Fernandez-Carmona, Eduard Albert-Villanueva and Ramon Salas
Late Chattian platform carbonates with benthic Foraminifera and coralline algae from the SE Iberian Plate (in Towards a calibrated larger Foraminifera biostratigraphic zonation, Vlasta Cosovic (editor) and Cesare Andrea Papazzoni (editor))
Palaios (January 2017) 32 (1): 61-82

Abstract

The carbonate system studied represents an under-investigated sedimentary record formed in the western end of the Tethys during the Chattian relatively warm climate regime. These platform carbonates are examined with respect to rock fabrics, biostratigraphy, biostratinomy, paleoecology, and sequence stratigraphy. Dominant carbonate producers include scleractinian corals and echinoids, but the most prolific were symbiont-bearing benthic foraminifera and coralline algae. The presence of Miogypsinoides complanatus and Miogypsinoides formosensis indicates a late Chattian age (Shallow Benthic Zone 23). The depositional profile is consistent with a homoclinal ramp. The absence of a barrier margin and thus, of a lagoon, facilitated the transport and re-working of biogenic components throughout the platform. As a result, facies are rather homogeneous corresponding to a rudstone mainly formed by benthic foraminifera and coralline algae, which passes basinwards to deeper ramp to hemipelagic deposits rich in echinoids and planktonic foraminifera. Within this dominant facies, only subtle and gradual lateral variations on the relative abundance or absence of certain skeletal components or species are recognized, comprising two end members. A proximal biofacies of benthic foraminifera and coralline algae including corals in growth position, fragments of green algae, and seagrass dwellers where Eulepidina, Nummulites, and Operculina are absent, and a distal biofacies where corals, green algae, and seagrass dwellers are not present, but Eulepidina, Nummulites and Operculina are common. Carbonate deposition was controlled by long-term relative sea-level fluctuations including a Rupelian?-late Chattian transgression, a late Chattian regression, which ended in subaerial exposure of proximal ramp carbonates, and a latest Chattian to early Miocene transgression. The Chattian carbonate platform was finally drowned around the Oligocene/Miocene transition.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 32
Serial Issue: 1
Title: Late Chattian platform carbonates with benthic Foraminifera and coralline algae from the SE Iberian Plate
Title: Towards a calibrated larger Foraminifera biostratigraphic zonation
Affiliation: Universitat de Barcelona, Departament de Mineralogia, Petrologia i Geologia Aplicada, Barcelona, Spain
Affiliation: University of Zagreb, Department of Geology, Zagreb, Croatia
Pages: 61-82
Published: 201701
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
Meeting name: 2nd international congress on Stratigraphy; towards a calibrated larger Foraminifera biostratigraphic zonation; newest results from Neotethys and beyond
Meeting location: Graz, AUT, Austria
Meeting date: 20150719July 19-23, 2015
References: 114
Accession Number: 2017-018549
Categories: Stratigraphy
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., geol. sketch map
N38°43'60" - N38°43'60", E00°09'00" - E00°09'00"
Secondary Affiliation: Universidad de Granada, ESP, SpainRepsol Exploracion, ESP, SpainSzalai Grup, ESP, Spain
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 201713
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