Document Type : Original Research Paper


1 Payame Noor University, Head office, Tehran, Iran

2 Assistant Professor, Department of Geology, Payam Noor University, Iran

3 M.Sc., Department of Geology, Payam Noor University, Iran


This research has aimed to study the biostrtigraphy and lithostratigraphy of late cretaceous deposits  in south of Maracan village , with 320 m thickness.This sequence overlaid the lower cretaceous deposits and have been covered  by Quaternary sedimentary and magmatic rocks. Based on field study and lithological diversity 8 lithic zone have been investigated.  102 samples have been picked up systematically from this sequence. This study lead to determining 41 species from 15 genera of planktonic foraminifera.The  systematic and classification of fauna are based on The (Postuma 1971) , (Caron1985) , (Loeblich and Tappan 1988) and (Permoli Silva And Verga 2004).  .Based on their range chart the bio zonation model for this deposit with 9 Bio Zones as bellow  have been suggested  and have compared with cretaceous global standard bio zones (Robazynsky and Caron 1985) and (Permoli Silva and Verga, 2004)
Dicarinella concavata  Interval  Zone (Robazynsky and Caron, 1995)
Dicarinella asymetrica Total  range  Zone(Robazynsky and Caron, 1995) 
Globotruncanita elevata IntervalrangeZone(Robazynsky and Caron, 1995)  
Globotruncana ventricosa IntervalZone  (Robazynsky and Caron, 1995)
Rodotruncana  calcarata Total  range  Zone(Robazynsky and Caron, 1995)  
Globotruncanella  havnensis  Partial Range Zone (Robaszynski  and Caron, 1985)
Globotruncana aegyptiaca Interval  Zone (Robazynsky and Caron, 1995)
Gansserina gansseri   Interval  Zone (Robazynsky and Caron, 1995)
Abathamphalus mayaroensis  Total  range  Zone(Robazynsky and Caron, 1995) 
The suggested age for sequence based on planktonic foraminifera is upper coniantian to upper Maestrichtian  and belong to deep shelf area . Based on the morphology of planktonic foraminifera and their keei we suggest deep sea environment for these  deposits. 


Main Subjects

Bolli, H. M., Saunders, B. J. and Perch-Nielsen, K., 1989- Plankton Stratigraphy. Cambridge University Press, 1032.
Caron, M., 1985- Cretaceous planktonic  foraminifera. In Bolli, H. M., Saunders, J.B. and Perch-Nielsen, K., Planktonstratigraphy, Cambrige university press, Cambridge Earth Science Series, 1, Cambridge University Press, 17, 86 P.
Chacon, B., Martin-Chivelet, J. and Grafe, K. U., 2004- Latest Santonian to latest Maastrichtian planktic foraminifera and biostratigraphy of the hemipelagic successions of the Prebetic Zone (Murrcia and Alicante provinces, south-east Spain). Cretac. Res. 25, 585 P.
Fleury, J. J., 1980- Les zones du Gavrovo-Tripolitza et duPinde-Olonos (Gérce continentale et Péloponnèse duNord). Evolution d’une plate-forme et d’un bassin dans le cadre alpin. Société Géologique du Nord, 4: 648 pp.
Li, L. and Keller, G., 1998- Diversification and extinction in Campanian-Maasttichtian planktic foraminiferal of the North-west Tunisia Eclogae. Geol. Helv. 91, pp 75- 102.
Loeblich Jr., A. R. and Tappan, H., 1987- Foraminiferal Genera and Their Classification; Van Nostrand Reinhold Company.  New York, 2, 970- 847 pl.
Loeblich Jr., A. R. and Tappan, H., 1988- Foraminiferal General and Their Classification Van Nostrand Reinhold Company, New Yourk, 2 Volumes, 970 p..
Nishia, H., 2003- Planktonic foraminiferal zonation in the Cretaceous Yezo Group, Central Hokkaido, Japan. Journal of Asian Earth Sciences 21, pp 867- 886.
Postuma, J. A.., 1971- Manual of Planktonic foraminifera, Elsevier publishing  company Amesterdam, London, NewyYork, 419 P.
Premoli Silva, I. and Sliter, W. V., 1981- Cretaceous planktonic foraminifers from the Nauru Basin, Leg 61, Site 462 Western equatorial Pacific. Initial Rep. Deep Sea Drill Proj. 61, pp 423- 437.
Premoli Silva, I. and Sliter, W. V., 1995- Cretaceous planktonic foraminiferal biostratigraphy and Evolutionary trends from the Bottaccione Section, Gubbio, Italy. Palaeontographica Italiana 82, pp 2- 90.
Premoli Silva, I. and Verga, D., 2004- Practical Manual of Cretaceous Planktonic Foraminifera. In: VergaD., RettoriR. (Eds.), International School on  Planktonic Foraminifera, 3rd Course: Cretaceous. Universities of  Perugia and Milan, Tiporafia Pontefelcino, Perugia (Italy), 283 P.
Robaszynski, F. and Caron, M., 1995-  Foraminiferes planctoniques du Cretace: Commentaire de la zonation Europe-Mediterrane. Bulletin de la Societe Geologique de France 166, pp 681- 692.
Sliter, W. V., 1989- Biostratigraphic  zonation for Cretaceous planktonic foraminifers examined in thin section. Journal of Foraminiferal Research, 19, 1, pp 1- 19.
Wan, X., Lamolda, M. A., Si, J. and Li, G., 2005- foraminiferal stratigraphy of Cretaceous red bed in Tibet: Cretaceous research V. 26, pp 43- 48.