Ammonites Biostratigraphy of the Sarcheshmeh Formation (Aptian); Hosein Abad section, northeast of the Kopet Dagh Basin


1 Ph.D. Student, department of geology,, Islamic Azad University, Science and Research Branch,

2 Department of Geology, research Institute for Earth Sciences. Department of Geoscience, Islamic Azad University - Science and Research Branch, Tehran, Iran

3 Department of Geology, Islamic Azad University - Khorasgan Branch, Isfahan, Iran

4 Department of Geoscience, Islamic Azad University - Science and Research Branch, Tehran, Iran

5 Assistant Professor, Museum of Mineralogy and Geology, Dresden, Germany


To determine the relative age of the Sarcheshmeh Formation in the northeast of the Kopet Dagh Basin, a stratigraphic section (Hosein Abad) with a thickness of 90 meters is selected. Lithologically, Sarcheshmeh Formation is mainly composed of gray to green marls with muddy limestone beds. In this research, based on ammonites, 10 species attributed to 4 genera of ammonites were identified. Accordingly, three biological zones, Deshayesites consobrinus, Deshayesites deshayesi, and Dufrenoyia mackesoni, are proposed confirming the Early’s relative age Aptian (Early Cretaceous) for Sarcheshmeh Formation in Hosein Abad section. The identified biological zones were also compared with some previous studies in the Kopet Dagh, Caucasus, and Mediterranean basins and it was found that the Sarcheshmeh Formation in the study area (northeast of the Kopet Dagh) shows well correlation to biological zones in the late Early Aptian. While, some studies on this Formation have reported biological zones related to the early Early Aptian.


Berberian, M., King. G.C.P., 1981. Toward a Palaeogeography and Tectonic Evolution of Iran, Canadian Journal of Earth Science 18, 210-265.
Ezati, M., Gholami, E., 2022. Neotectonics of the Central Kopeh Dagh drainage basins, NE Iran. Arabian Journal of Geosciences 15, 992.
Foroughi, F., Gardin, S., Kani, A.L., Vahidinia, M., 2017. Calcareous nannofossil biostratigraphy of Campanian strata (Abtalkh Formation) from the eastern Koppeh-Dagh Basin, NE Iran. Cretaceous Research 70, pp.55-70.
Ghassemi, M.R., Garzanti, E., 2019. Geology and Geomorphology of Turkmenistan, A review. Geopersia 9(1), 125-140.
Haynes, S.J., 1981. Towards a paleogeography and tectonic evolution of Iran, Discussion. Canadian Journal of Earth Sciences 18(11),1763-1764.
Hancock, J.M., 1991. Ammonite scales for the Cretaceous System. Cretaceous Research 12, 259-291.
Honarmand, A., Vahidinia, M., Mahmudy Gharaie, M.H., Shafieeardestani, M., 2020. Biostratigraphy of Upper Cretaceous Planktonic Foraminifera of the Abtalkh Formation in an East–West transect, Kopet Dagh Basin, Northeastern Iran. Micropaleontology 66, 285-300.
Immel, H., Seyed_Emami, K., Afshar Harb, A., 1997. Kreide-Ammoniten aus dem iranischen teil des Koppeh Dagh (NE Iran), Zitteliana 21, 159-190.
Kotetishvili, E., 1979. Les Calcaires Urgoniens de Géorgie. Geobios 12, 193-200.
Maleki-Porazmiani, S., Ghasemi-Nejad, E., Farmani, T., 2020. Palynology and Sequence Stratigraphy of the Albian-Cenomanian strata from the Koppeh-Dagh Basin, northeastern Iran. Geopersia 10(2), 351-365.
Moritz, R., 2016. The economic geology of Iran, mineral deposits and natural resources 6, 1519.
Mosavinia, A., Wilmsen, M., 2017. Cenomanian Turrilitidae (Cretaceous heteromorph ammonites) from the Koppeh Dagh, northeast Iran, Taxonomy and stratigraphic implications. Cretaceous Research 78, 113-126.
Niazi, M., Vahidinia, M., Jain, S., Mahmudy Gharaie, M.H., 2019. The Campanian-Maastrichtian Planktonic Foraminifera of the Kopet-Dagh Basin (NE Iran), Bioevents and Biostratigraphy. Neues Jahrbuch für Geologie und Paläontologie-Abhandlungen 294, 103-129.
Raisossadat, S.N., 1999. Biostratigraphy of the Lower Cretaceous (Barremian-Albian) Succession of the Kopet Dagh Basin, NE_Iran, Am. Assoc. Petroleum Geology Bulletin 83,1895.
Raisossadat, S.N., Moussavi Harami. R., 2000. Lithostratigraphic and Facies Analysis of the Sarcheshmeh Formation (Lower Cretaceous) in the Eastern Kopet Dagh Basin, NE Iran, Cretaceous Research 21, 507-516.
Raisossadat, S.N., 2004. The Family Deshayesitidae in the Kopet Dagh Basin, North East Iran, Cretaceous Research 25, 115-136.
Raisossadat, S.N., 2006. The Family Parahoplitidae in the Sanganeh Formation of the Kopet Dagh Basin, Northeastern of Iran, Cretaceous Research 27, 907-922.
Raisossadat, S.N., Shokri, M.H., 2011. Biostratigraphic Studies of the Lower Cretaceous (Upper Barremian—Lower Aptian) Sarcheshmeh and Sanganeh Formations in the Kopet Dagh Basin, NE Iran, an Integration of Calcareous Nannofossil and Ammonite Stratigraphies. Stratigraphy and Geological Correlation 19 (2), 188-204.
Raissosadat, S.N., 2018. Late Barremian Heteroceratidae Hyatt 1900 (ammonoidea), from the Sarcheshmeh Formation (Koppeh-Dagh Basin, Northeast Iran), Biostrartigraphy and Paleobiogeoraphy. Geopersia 8(2),171-197. 10.22059/GEOPE.2018.239235.648339
Reboulet, S., Klein, J., Barragán, R., Company, M., González-Arreola, C., Lukeneder, A., Raisossadat, S.N., Sandoval, J., Szives, O., Tavera, J.M. and Vašíček, Z., 2009. Report on the 3rd international meeting of the IUGS lower Cretaceous ammonite working group, the “Kilian Group”(Vienna, Austria, 15th April 2008). Cretaceous Research 30(2), pp.496-502.
Robert, A.M., Letouzey, J., Kavoosi, M.A., Sherkati, S., Müller, C., Vergés, J. and Aghababaei, A., 2014. Structural Evolution of the Kopeh Dagh Fold-and-Thrust Belt (NE Iran) and Interactions with the South Caspian Sea Basin and Amu Darya Basin. Marine and Petroleum Geology 57, 68-87.
Seyed-Emami, K., 1981. Parahoplitidae (Ammonoidea) aus dem Nordost und Zentraliran. Neues Jahrbuch für Geologie und Paläontologie-Monatshefte 12, 719-737.
Seyed-Emami, K., Förster, R., Mojtehedi, A., 1984. Ammoniten aus dem mittleren Cenoman von Nordost-Iran (Koppeh-Dagh). Neues Jahrbuch für Geologie und Paläontologie-Monatshefte 3, 159-172.
Seyed-Emami, K., Schairer, G., Fürsich, F.T., Wilmsen, M., Majidifard, M.R., 2002. Reineckeiidae (Ammonoidea) from the Callovian (Middle Jurassic) of the Shotori Range (East Central Iran). Neues Jahrbuch für Geologie und Paläontologie-Monatshefte 3, 184-192.
Shafiee Ardestani, M., Vahidinia, M., 2021. Study of main planktonic foraminifera (Turonian-Santonian) in Kopeh-Dagh sedimentary environment, NE Iran. Sustainable Earth Review 1(4), 36-43.
Sharifi, J., Tajika, A., Mohammadabadi, A. and Tabari Abkuh, M.H., 2021. First discovery of nautilids from the Albian–Cenomanian succession of the Koppeh Dagh Basin, NE Iran. Swiss Journal of Palaeontology 140, 1-12.
Vahidinia, M., 2021. Biostratigraphy of planktonic foraminifera in the Abtalkh Formation and determination of the Santonian-Campanian Boundary in the Kopeh-Dagh Sedimentary Basin. Stratigraphy 18, 71-87.