Lithostratigraphy and microbiostratigraphy of the Tarbur Formation inthe Zangeneh section of interior Fars (Folded Zagros), South of Iran

Maryam Dehghani, Seyed Hamid Vaziri, Vahid Ahmadi

Abstract


The up to 201 m thick, carbonate Campanian to Maastrichtian (Tarbur Formation), which crop out well in the Zangeneh section of interior Fars (Zagros folded zone). According to the lithostratigraphic investigations, the Tarbur Formation in study section canbe subdivided into four rock units which include thin- to thick-bedded and massive limestones.Micropaleontological study of the Tarbur Formation in the studied section has led to the recognition of threebiozones and identification of 11 genera and 12 species of benthic foraminifera.The identified microfossils includetheLepidorbitoidessp.,Rotaliasp.,Orbitoides media, Antalynakorayi, Dicyclinaschlumbergeri, Dicyclinasp.,Orbitoidesconcavatus, Minouxiasp.,Nezzazatinellasp.,Loftusiacoxi, Trochosopirasp.,Gavelinellasp.,Minouxiagumbelitrioides, Orbitoidessp.,Gavelinellapertusa, Orbitoidestissoti, Rotaliaskourensis, Siderolitessp., Lepidorbitoidessocialis,Omphalocyclusmacroporus,Omphalocyclussp.Orbitoidesapiculata, Quinqueloculinasp.,Miliolids.

The richassociation of benthic foraminifera and rudistsindicated a Campanian to Maastrichtian age for the formation.


Keywords


Biostratigraphy, lithostratigraphy, TarburFormation, foraminifera, Zangeneh, interior Fars, South of Iran

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