Early Cretaceous Index Benthic Foraminifera from Northeast of Torbat-e-Heydarieh Area (Esfiyukh Section)

Abstract

The first study of early cretaceous succession in Northeast of Torbat-e-Heydarieh, led to recognition of 30 genera and 25 species of benthic foraminifera such as Rectodictyorbitolina sp., Dictyoconus arabicus , Orbitolina discoidea , Palorbitolina lenticularis , Mesorbitolina parva , Orbitolina kurdica , Praeorbitolina sp., Valvullammina picardi , Pseudocyclamina lituus , Charentia cuvillieri , Lenticulina sp., Nezzazata picardi , Quinqueloculina robusta , Nautiloculina oolitica , Subaudia minuta , Praechrysalidina infracteracea , Rumanoloculina sp., Choffahella decipiens , Vercorsella arenata. Regard to Stratigraphy range of above mentioned, the Barremian–Aptian age suggested for this succession.