Document Type : Original Research Paper


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

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

3 Young Researchers club, Science and Research Branch, Islamic Azad University, Tehran, Iran.

4 Invertebrates & Plants Curation, Natural History Museum, London, England.


Three rock units have been identified in Shamsabad and Runiz stratigraphic sections of Asmari Formation in internal Fars region. Gastropods of Shamsabad and Runiz stratigraphic sections belong to four orders, Mesogastropoda, Neogastropoda, Architaenioglossa, Sorbeoconcha. Seven genuses and three subgenus have been recognized in lower and middle parts. In general, four genuses and one subgenus of gastropods in lower part indicating the age of Chatian, two genuses and two subgenus in middle part are indicating the age of Aquitanian and a genus in upper part indicating the age of middle Eocene (lower boundary of Asmari Formation) has been observed with foraminifers species that include Somalina stefunini, Rhapydionina urensis. the age of Asmari Formation gastropods in the studied region is alike with associated foraminifera biozones that include, Nummulites fichteli – Nummulites intermedius – Nummulites vascus assemblage – zone, indicating the age of Chatian and Austroterillina howchini – Peneroplis evolutus assemblage –zone, indicating the age of Aquitanian. Gastropods recognized in sections, are listed below: Olivella sp., Mitra sp., Ampullina sp., Ampullospira sp., Campanile sp., Strombus sp., Natica sp., Tortoliva sp., Lithoconus sp., Dendroconus sp.


Adames, T. D. & Bourgeois., F., 1967- Asmari biostratigraphy: Gbological and Exploration, IOOC Report, no. 1074, unpublished.
Harzhauser, M., 2001- Strombus(Dilatilabrum) roegly sp. nov.- a giant Oligocene strombid (Gastropod) and its bearing on paleoclimatic reconstructions of the western Tethys , Palaeontographica 102A: 51–67.
Harzhauser, M., 2004- Oligocene Gastropod Faunas of the Eastern Mediterranean (Mesohellenic Trough/Greece and Esfahan-Sirjan Basin/Central Iran), Courier Forschungsinstitut Senckenberg 248: 93–181.
Harzhauser, M., 2007- Oligocene and Aquitanian Gastropod Faunas from the Sultanate of Oman and their biogeographic implications for the early western Indo-Pacific, Palaeontographica 280: 75–121.
Harzhauser, M., 2009- Aquitanian gastropods of coastal Tanzania and their biogeographic implications for the early western Indo- Pacific, Palaeontographica (in press)
James, G. A. & Wynd, J. C., 1965- Stratigraphy nomenclatyre of Iranian oil consortium agreement area, AAPG Bulletin, v.49,no.12,p.2182-2245.
Loblish, A. R. &  Tappan., H. 1988- Foraminiferal genera and their classification, Van Nostrd Reinhold Company, New York, p.970.
Miline- Edwards, H., 1848- Note sur la classification naturelle des mollusques gasteropodes, Annals des Science Naturelles )Zoologie, serie3) 9, p 102-112.
Okan, Y. & Hosgor, I., 2008-The Ampullinid Gastropod Globularia (Swainson 1840) from the Late Thanetian-Early Iierdian Kirkkavak Formation (Polatl-Ankara) of the Tethyan Realm, Turkish Journal of the earth Sciences,Vol.17,2008,pp.785-801.
Ponder, W. F. & D. R., Lindberg., 1997-Towards a phylogeny of gastropod molluscs: An analysis using morphological characters , Zoological Journal of the Linnean Society 119: 83-2651.
Rahaghi, A., 1983-Stratigraphy and final assemblage zone of Paleocene- Lower Eocene in Iran, N.I.O.C Publication,p.1-45.
Ray, A. K., 2008- Fossils in earth Sciences, Published by Asoke K.Ghosh, Prentice-Hall of India Private Limited, M-97.
Thomas, A. N., 1948 - The Asmari Limestone of southwest Iran, AIOC Report, no.