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The stratigraphic study of upper Cretaceous and Paleocene rocks of the median part of Central Iran was carried out this study. The conclusive evidence obtained form this study proved the presence of the Paleocene deposits in an uninterrupted passage sequence with the Maestrichtian units.
A first inventory of late Maestrichtian - Paleocene marine and continental sedimentary facies has been collected from field sections in S - SE Yazd area.
In late Maestrichtian Units, the presence of Orbitoides media, Omphalocyclus macroporus, Lepidorbitoides minor, etc... was observed. And, within the Paleocene Units there are index Foraminifera's dominated by species such as Miscellanea miscella, Sistanites iranica, Kathina cf. delseota which are associated with green algae (i. e Cymopolia may - aense, Cymopolia heraki, Neomeris plagnensis, Acroporella cf. anceps, Clypeina sp. and Halimeda sp).