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Upper Albian, Cenomanian and Lower Turonian stratigraphy, ammonite and inoceramid bivalve faunas from the Cauvery Basin, Tamil Nadu, South India

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dc.abstract.enThe lithostratigraphy, biostratigraphy, sequence stratigraphy, ammonite and inoceramid faunas of the Upper Albian, Cenomanian, and Lower Turonian Karai Formation, the highest unit of the Uttatur Group in the Pondicherry Sub-Basin of the Cauvery Basin in Tamil Nadu, south India, are documented. Detailed logs and descriptions of sections between Karai and Kulakkalnattam, Odiyam and Kunnam, and north-west of Garudamangalam are presented. They provide the evidence for an ammonite zonal scheme that can be cor-related in detail with sequences developed in Europe, with successive Upper Albian zones of Pervinquieria(Subschloenbachia) rostrata and P. (S.) perinflata (the latter on slight evidence), Cenomanian zones of Mantelli-ceras mantelli, Cunningtoniceras cunningtoni, Calycoceras (Newboldiceras) asiaticum, Pseudo calycoceras harpax, Euomphaloceras septemseriatum and Pseudspidoceras footeanum. The Lower Turonian is repre-sented by a Neoptychitescephalotus–Mytiloides borkari fauna. Over 120 ammonite species are described, of which Puzosia (Bhimaites) falx, Protacanthoceras parva, Watinoceras elegans, Euomphaloceras varicostatum, Kamerunoceras multinodosum, and Carthaginites multituberculatus are new. The new genus Kunnamiceras, with Ammonites tropicus Kossmat, 1865 as type species, is interpreted as a paedomorphic dwarf derivative of Pseudocalycoceras harpax (Stoliczka, 1864). Ammonite faunas from shales are dominated by feebly-orna-mented taxa: leiostraca; those from sandstones by strongly ornamented taxa: trachyostraca, differences inter-preted as reflecting the preferred habits of adults in life. 15 species of inoceramid bivalves, including a newly described species Inoceramus chiplonkari, are recognised, with a mixed East African–Euramerican–North Pacific affinity. On the basis of the stratigraphic framework developed, a sequence stratigraphic interpretation of the Karai Formation is proposed, and correlated with those recognised in Europe, Morocco, and the United States Gulf Coast and Western Interior.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKennedy, William J.
dc.contributor.authorGale, Andrew S.
dc.contributor.authorWalaszczyk, Ireneusz
dc.date.accessioned2024-01-26T11:21:18Z
dc.date.available2024-01-26T11:21:18Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.number2
dc.description.volume69
dc.identifier.doi10.24425/AGP.2019.126438
dc.identifier.issn0001-5709
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/124291
dc.identifier.weblinkhttp://journals.pan.pl/dlibra/publication/126438/edition/110340/content
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofActa Geologica Polonica
dc.relation.pages161-338
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enCretaceous
dc.subject.enAmmonites
dc.subject.enInoceramid bivalves
dc.subject.enSequence stratigraphy
dc.subject.enSouth India
dc.titleUpper Albian, Cenomanian and Lower Turonian stratigraphy, ammonite and inoceramid bivalve faunas from the Cauvery Basin, Tamil Nadu, South India
dc.typeJournalArticle
dspace.entity.typePublication