Microbiostratigraphy study of Kazhdumi and Sarvak Formations in north and north- east Shiraz

Document Type : Original Research


1 Department of Geology, Faculty of Basic Sciences, Sciences & Research Branch, Islamic Azad University, Tehran, Iran

2 Department of Geology, Faculty of Science, Islamic Azad University - Shiraz Branch, Shiraz, Iran


In this research two stratigraphic sections entitled as Kuh-e Gadvan and Kuh-e Rahmat sections related to Kazhdumi and Sarvak Formations have been selected. The thickness of the sediments in these sections is 1000 m and they have been studied in 600 thin-sections. Considering the identified index Foraminifers in the studied sections such as the following taxons:
Orbitolina sp. O. concave , Simplorbitolina cf. conolus, Mesorbitolina cf. texana, Hemicyclammina sigali, Ticinella madecassiana, Calcisphaerula innominata, Stomiosphaera sphaerica, Favusella washitensis, Rotalipora cf. balernaensis, Ticinella cf. raynaudi, Rotalipora cushmani, Rotalipora cf. greenhorensis, Nezzazata simplex, Nezzazata conica, Dicyclina cf. schlumbrgeri, Ticinella cf. primula, Ovalveolina cf. ovum, Praealveolina simplex, Cuneolina cf. pavonia, Heterohelix reussi, Pithonella perlonga, Dictyoconus arabicus. The age of studied sediments is lower Albian -upper Cenomanian. Also considering microbiostratigraphic studies, four biozones and one sub-zone have been recognized for identified Foraminifers in the studied sections.