Carbonates and Evaporites

, Volume 26, Issue 3, pp 255–271 | Cite as

Microfacies analysis and paleoenviornmental interpretation of the Qom Formation, South of the Kashan, Central Iran

  • Ebrahim MohammadiEmail author
  • Amrollah Safari
  • Hossein Vaziri-Moghaddam
  • Mohammad-Reza Vaziri
  • Mehdi Ghaedi
Original Article


Qom Formation (Oligo-Miocene marine deposits, Central Iran) in the South of Kashan, was studied in order to determine its microfacies and depositional environment. Thirteen microfacies (MF A–M) were distinguished based on petrography, sedimentological features, components distribution and present fauna. According to recognized microfacies and absence of gravity deposits, real and continuous reef, barrier and storm structures, carbonate platform of the Qom Formation in South of Kashan developed on an open shelf without effective barriers separating it from the sea. The co-occurrences of miliolids and planktonic foraminifera in planktonic microfacies is the reliable evidences for absence of any reefal, oolitic and bioclastic barriers in depositional environment, and deposition of the study section on an open shelf, as in the absence of barrier, currents removed miliolids to deeper parts of sea (basin). Three major depositional environments were identified in the Oligo-Miocene succession in the study section, on the basis of the distribution of the foraminifera and vertical facies relationships. They include inner shelf, middle shelf and proximal outer shelf. Inner shelf includes MF A–G and characterized by abundant imperforate foraminifera. Middle shelf comprises MF H–J and characterized by association of larger benthic foraminifera with hyaline wall. Proximal outer shelf includes MF K–M and characterized by the presence of planktonic foraminifera and absence of larger benthic foraminifera, as well as abundance of light-independent, heterotroph organisms.


Qom Formation Central Iran Kashan Oligo-Miocene Benthic foraminifera Planktonic foraminifera Open shelf Tethyan Seaway 



The authors wish to thank the anonymous reviewers for their helpful and constructive comments. Dr. Mehdi Yazdi, Dr. Ali Seyrafian, Dr. Ali Bahrami, Dr. Mohammad Mohammadi-Monfared, Mohammad Allahkarampour Dill, Asghar Roozpeykar, Rahman Azadbakht, Dr. Reza sadeghi, Dr. Abdollah Amini, Hassan Safdari, Zahra Babaei, Chavare Bayazidi and Samira Shahriari Garaei are thanked for useful discussions and suggestions. Dr. Hossein Batouli is gratefully acknowledged for the valuable help in the field. We also would like to thank the University of Isfahan, Shahid Bahonar University of Kerman and National Iranian Oil Research and Development for the financial support.


  1. Abdulsamad EO, Barbieri R (1999) Foraminiferal distribution and palaeoecological interpretation of the Eocene–Miocene carbonates at Al Jabal al Akhdar (northeast Libya). J Micropalaeontol 18:45–65Google Scholar
  2. Adabi M, Zohdi A, Ghabeishavi A, Amiri-Bakhtiyar A (2008) Applications of nummulitids and other larger benthic foraminifera in depositional environment and sequence stratigraphy: an example from the Eocene deposits in Zagros Basin, SW Iran. Facies 54:499–512Google Scholar
  3. Adams TD, Bourgeois F (1967) Asmari biostratigraphy: geological and exploration, IOOC Report, no. 1074 (unpublished)Google Scholar
  4. Aghanabati A (2004) Geology of Iran, Geological Survey of Iran (in Persian)Google Scholar
  5. Allahkarampour Dill M, Seyrafian A, Vaziri-Moghaddam H (2010) The Asmari Formation, north of the Gachsaran (Dill anticline), southwest Iran: facies analysis, depositional environments and sequence stratigraphy. Carbonates Evaporites 25:145–160Google Scholar
  6. Amirshahkarami M, Vaziri-Moghaddam H, Taheri A (2007a) Sedimentary facies and sequence stratigraphy of the Asmari Formation at the Chaman-Bolbol, Zagros basin Iran. J Earth Sci 29:947–959Google Scholar
  7. Amirshahkarami M, Vaziri-Moghaddam H, Taheri A (2007b) Paleoenvironmental model and sequence stratigraphy of the Asmari Formation in southwest Iran. Hist Biol 19(2):173–183Google Scholar
  8. Barattolo F, Bassi D, Romano R (2007) Upper Eocene larger foraminiferal–coralline algal facies from the Klokova Mountain (southern continental Greece). Facies 53:361–375Google Scholar
  9. Bassi D, Braga JC, Iryu Y (2009) Palaeobiogeographic patterns of a persistent monophyletic lineage: Lithophyllum pustulatum species group (Corallinaceae, Corallinales, Rhodophyta), palaeogeography, palaeoclimatology. Palaeoecology 284:237–245Google Scholar
  10. Bé, AHW (1977) An ecological, zoogeographic and taxonomic review of recent planktonic foraminifera. In: Mateu-Vicens G, Hallock P, Brandano M, 2008b. Test shape variability of Amphistegina d’Orbigny 1826 as a paleobathymetric proxy: application to two Miocene examples. In: Demchuk T, Gary A (eds) Geologic problems solving with microfossils. SEPM Special Volume 93, pp 67–82Google Scholar
  11. Beavington-Penney SJ, Racey A (2004) Ecology of extant nummulitids and other larger benthic foraminifera: applications in palaeoenvironmental analysis. Earth Sci Rev 67:219–265Google Scholar
  12. Berberian M (1983) The southern Caspian: a compressional depression floored by a trapped, modified oceanic crust. Can J Earth Sci 20:163–183Google Scholar
  13. Berning B, Reuter M, Piller WE, Harzhauser M, Kroh A (2009) Larger foraminifera as a substratum for encrusting bryozoans (Late Oligocene, Tethyan Seaway, Iran). Facies 55:227–241Google Scholar
  14. Biolzi M, Iaccarino SM, Turco E, Rettori R (2005) Practical manual of Oligocene to Middle Miocene planktonic foraminfera, IV course, dalla Tipografia Pontefelcino-PerugiaGoogle Scholar
  15. Boudagher-Fadel MK, Lokier SW (2005) Significant Miocene larger foraminifera from South Central Java, Revue de Palkobiologie. Genkve Cjuin 24(1):291–309Google Scholar
  16. BouDagher-Fadel M, Lord A (2006) Illusory stratigraphy decoded by Oligocene–Miocene foraminifera, Pakhna Formation (Cyprus). Stratigraphy 3(3):217–226Google Scholar
  17. Boukhary M, Kuss J, Abdelraouf M (2008) Chattian larger foraminifera from Risan Aneiza, northern Sinai, Egypt, and implications for Tethyan paleogeography. Stratigraphy 5:179–192Google Scholar
  18. Bozorgnia F (1966) Qum formation stratigraphy of the Central Basin of Iran and its intercontinental position. Bull Iran Petrol Inst 24:69–76Google Scholar
  19. Brandano M, Corda L (2002) Nutrients, sea level and tectonics: constrains for the facies architecture of a Miocene carbonate ramp in central Italy. Terra Nova 14:257–262Google Scholar
  20. Brandano M, Frezza V, Tomassetti L, Pedley M (2008) Facies analysis and paleoenvironmental interpretation of the Late Oligocene Attard Member (Lower Coralline Limstone Formation), Malta. Sedimentology. doi: Google Scholar
  21. Brandano M, Frezza V, Tomassetti L, Cuffaro M (2009) Heterozoan carbonates in oligotrophic tropical waters: the Attard member of the lower coralline limestone formation (Upper Oligocene, Malta), palaeogeography, palaeoclimatology. Palaeoecology 274:54–63Google Scholar
  22. Brasier MD (1995) Fossil indicators of nutrient levels: 2. Evolution and extinction in relation to oligotrophy. In: Bosence DWJ, Allison PA (eds) Marine palaeoenvironmental analysis from fossils. Geological Society of London Special Publication, vol 83, pp 133–150Google Scholar
  23. Corda L, Brandano M (2003) Aphotic zone carbonate production on a Miocene ramp, Central Apennines, Italy. Sed Geol 161:55–70Google Scholar
  24. Cosovic V, Drobne K, Moro A (2004) Paleoenviornmental model for Eocene foraminferal Limstones of the Adriatic carbonare platform (Istrian Pennisula). Facies 50:61–75Google Scholar
  25. Daneshian J, Ramezani Dana L (2007) Erly Miocene benthic foraminifera and biostratigraphy of the Qom Formation, Deh Namak, Central Iran. J Asian Earth Sci 29:844–858Google Scholar
  26. Daneshian J, Raziei A (2005) A study of the Qom Formation benthonic foraminifera strathgraphic distribution. In: Proceedings of the 9th symposium of geological society of Iran, Southwest of Kashan (in Persian)Google Scholar
  27. Dunham RJ (1962) Classification of carbonate rocks according to depositional texture. In: Ham WE (ed) Classification of carbonate rocks. Am Ass Petrol Geol Mem 1, pp 108–121Google Scholar
  28. Ehrenberg SN, Pickard NAH, Laursen GV, Monibi S, Mossadegh ZK, Svana TA, Aqrawi AAM, McArthur JM, Thirlwall MF (2007) Strontium isotope stratigraphy of the Asmari Formation (Oligocene–Lower Miocene), SW Iran. J Petrol Geol 30(2):107–128Google Scholar
  29. Embry AF, Klovan JE (1971) A late Devonian reef tract on northeastern Banks Islands, Northwest Territories. Bull Can Petrol Geol 19:730–781Google Scholar
  30. Faiz-Nia S, Mosafi HR (1998) Microfacies and depositional environment of the Qom Formation in Semnan region. Geoscience 27–28 (in Persian)Google Scholar
  31. Flugel E (2004) Microfacies of carbonate rocks. Springer, BerlinGoogle Scholar
  32. Geel T (2000) Recognition of stratigraphic sequences in carbonate platform and slope deposits: empirical models based on microfacies analysis of Palaeogene deposits in southeastern Spain. Palaeogeogr Palaeoclimatol Palaeoecol 155:211–238Google Scholar
  33. Ghabeishavi A, Vaziri-Moghaddam H, Taheri A (2009) Facies distribution and sequence stratigraphy of the Coniacian–Santonian succession of the Bangestan Palaeo-high in the Bangestan Anticline, SW Iran. J Asian Earth Sci. doi: Google Scholar
  34. Ghabeishavi A, Vaziri-Moghaddam H, Taheri A, Taati F (2010) Microfacies and depositional environment of the Cenomanian of the Bangestan anticline, SW Iran. J Asian Earth Sci 37:275–285Google Scholar
  35. Ghasemi A, Talbot CJ (2006) A new tectonic scenario for the Sanandaj–Sirjan Zone (Iran). J Asian Earth Sci 26:683–693Google Scholar
  36. Ghose BK (1977) Paleoecology of the Cenozoic reefal foraminifers and algae—a brief review. Palaeogeogr Palaeoclimatol Palaeoecol 22:231–256Google Scholar
  37. Halfar J, Mutti M (2005) Global Dominance of corallin red-algal facies: a response to Miocene oceanographic-events. Geology 33:481–484Google Scholar
  38. Hallock P (1985) Why are larger foraminifera large? Paleobiology 11:195–208Google Scholar
  39. Hallock P, Glenn EC (1986) Larger foraminifera: a tool for paleoenvironmental analysis of Cenozoic carbonate depositional facies. Palaios 1:44–64Google Scholar
  40. Hallock P, Forward LB, Hansen HJ (1986) Influence of environment on the test shape of Amphistegina. J Foram Res 16:224–231Google Scholar
  41. Hasanzade Dastgerdi M (2010) Biostratigraphy, microfacies and sedimentary environments of the Qom Formation in Sede Barzok area (southwest of Kashan). Unpublished MSc Dissertation, Isfahan University (in Persian)Google Scholar
  42. Heydari E, Hassanzadeh J, Wade WJ, Ghazi AM (2003) Permian–Triassic boundary interval in the Abadeh section of Iran with implications for mass extinction. Part 1—sedimentology. Palaeogeogr Palaeoclimatol Palaeoecol 193:405–423Google Scholar
  43. Hottinger L (1983) Processes determining the distribution of larger foraminifera in space and time. Utrecht Micropaleontol Bull 30:239–253Google Scholar
  44. Hottinger L (1997) Shallow benthic foraminiferal assemblages as signals for depth of their deposition and their limitations. Bull Soc Geol France 168(4):491–505Google Scholar
  45. Khaksar K, Maghfouri Moghadam I (2007) Paleontological study of the echinoderms in the Qom Formation (Central Iran). Earth Sci Res J 11(1):57–79Google Scholar
  46. Laursen GV, Monibi S, Allan TL, Pickard NAH, Hosseiney A, Vincent B, Hamon Y, van Buchem FSPV, Moallemi A, Druillion G (2009) The Asmari formation revisited: changed stratigraphic allocation and new biozonation, Shiraz—first international petroleum conference and exhibition, 4–6 May 2009Google Scholar
  47. Leuttenger S (1984) Symbiosis in benthic foraminifera: specificity and host adaptations. J Foram Res 14:16–35Google Scholar
  48. Loeblich AR, Tappan H (1998) Foraminiferal genera and their classification. Van Nostrand Reinhold Company, New YorkGoogle Scholar
  49. Loftus WK (1855) On the geology of portions of the Turko-Persian frontier, and of the districts adjoining. Q J Geol Soc Lond 11(pt 1):247–344 (23 figs, 1 pl)Google Scholar
  50. Mateu-Vicens G, Hallock P, Brandano M (2008a) A depositional model and paleoecological reconstruction of the lower Tortonian distally steepened ramp of Minorca (Balearic Islands, Spain). Palaios 23:465–481Google Scholar
  51. Mateu-Vicens G, Hallock P, Brandano M (2008b) Test shape variability of Amphistegina d’Orbigny 1826 as a paleobathymetric proxy: application to two Miocene examples. In: Demchuk T, Gary A (eds) Geologic problems solving with microfossils, SEPM Special Volume 93, pp 67–82Google Scholar
  52. Momenzadeh A (2003) Stratigraphy of the Qom Formation in southeast of Kashan. Unpublished MSc Dissertation, Isfahan University (in Persian)Google Scholar
  53. Mossadegh ZK, Haig DW, Allan T, Adabi MH, Sadeghi A (2009) Salinity changes during Late Oligocene to Early Miocene Asmari Formation deposition, Zagros Mountains, Iran. Palaeogeogr Palaeoclimatol Palaeoecol 272:17–36Google Scholar
  54. Mutti M, Hallock P (2003) Carbonate systems along nutrient and temperature gradients: some sedimentological and geochemical constraints. Int J Earth Sci (Geol Rundsch) 92:465–475Google Scholar
  55. Naeije MR (2000) Depositional environment of mixed carbonate–epiclastic deposits of the Qom formatio in east of Tehran. In: Proceedings of the fourth symposium of geological society of Iran, Tabriz University, Tabriz, Iran (in Persian), p 652 (in Persian)Google Scholar
  56. Okhravi R, Amini A (1998) An example of mixed carbonate–pyroclastic sedimentation (Miocene, central Basin, Iran). Sed Geol 118:37–57Google Scholar
  57. Özcan E, Less G, Báldi-Beke M, Kollányi K, Acar F (2009) Oligo-Miocene foraminiferal record (Miogypsinidae, Lepidocyclinidae and Nummulitidae) from the Western Taurides (SW Turkey): biometry and implications for the regional geology. J Asian Earth Sci 34:740–760Google Scholar
  58. Pomar L (2001a) Ecological control of sedimentary accommodation: evolution from a carbonate ramp to rimmed shelf, Upper Miocene, Balearic Islands: paleogeography, palaeoclimatology. Palaeoecology 175:249–272Google Scholar
  59. Pomar L (2001b) Types of carbonate platforms: a genetic approach. Basin Res 13:313–334Google Scholar
  60. Rahimzadeh F (1994) Geology of Iran: Oligocene–Miocene, Pliocene. Geological Survey of Iran (in Persian)Google Scholar
  61. Rahmani A, Vaziri-Moghaddam H, Taheri A, Ghabeishavi A (2009) A model for the paleoenvironmental distribution of larger foraminifera of Oligocene–Miocene carbonate rocks at Khaviz Anticline, Zagros Basin, SW Iran. Hist Biol 21:215–227Google Scholar
  62. Reuter M, Piller WE, Harzhauser M, Mandic O, Berning B, Rogl F, Kroh A, Aubry MP, Wielandt-Schuster U, Hamedani A (2008) The Oligo-/Miocene Qom Formation (Iran): evidence for an early Burdigalian restriction of Tethyan Seaway and closure of its Iranian gateways. Int J Earth Sci 98:627–650Google Scholar
  63. Romero J, Caus E, Rossel J (2002) A model for the paleoenviornmental distribution of larger foraminifera based on Late Middle Eocene deposits on the margin of the south Pyrenean Basin (SE Spain). Palaeogeogr Palaeoclimatol Palaeoecol 179:43–56Google Scholar
  64. Sadeghi R, Vaziri-Moghaddam H, Taheri A (2009) Biostratigraphy and paleoecology of the Oligo-Miocene succession in Fars and Khuzestan areas (Zagros Basin, SW Iran). Hist Biol.
  65. Schuster F, Wielandt U (1999) Oligocene and Early Miocene coral faunas from Iran: paleoecology and paleobiogeography. Int J Earth Sci 88:571–581Google Scholar
  66. Sedighi M (2008) Biostratigraphy and sedimentary environment of the C member of the Qom Formation in south and southeast of Qom. Unpublished MSc Dissertation, Isfahan University (in Persian)Google Scholar
  67. Seyrafian A, Hamedani A (2003) Microfacies and paleoenvironmental interpretations of the Lower Asmari Formation (Oligocene), north-central Zagros Basin, Iran. N Jb Geol Palaont Mh 3:164–174Google Scholar
  68. Seyrafian A, Torabi H (2005) Petrofacies and sequence stratigraphy of the Qom Formation (Late Oligocene-Early Miocene?), North of Nain. Southern trend of the Central Iranian Basin. Carbonates Evaporites 20(1):82–90Google Scholar
  69. Seyrafian A, Torabi H, Shojaei M (2006) microfacies and depositional environment of the Qom Formation in Natanz region (Charkha mountain). Basic Sci J Isfahan Univ 23:135–148 (in Persian)Google Scholar
  70. Sharaf EF, BouDagher-Fadel MK, Simo JAT, Carroll AR (2005) Biostratigraphy and strontium isotope dating of Oligocene–Miocene strata, East Java, Indonesia. Stratigraphy 2(3):18Google Scholar
  71. Stocklin J, Setudehnia A (1991) Stratigraphic Lexicon of Iran. Geological Survey of Iran Publication, 3rd edn, vol 18, p 376Google Scholar
  72. Taheri A, Vaziri-Moghaddam H, Seyrafian A (2008) Relationships between foraminiferal assemblages and depositional sequences in Jahrum Formation, Ardal area (Zagros Basin, SW Iran). Hist Biol 20(3):191–201Google Scholar
  73. Vahdati-Daneshmand F (1975) Geology and petrology analysis in Dokhan area, 75 km west of Saveh. Unpublished MSc Dissertation, Tehran University, 195 p (in Persian)Google Scholar
  74. Vaziri MR (1987) Stratigraphy, geology and paleontology study in south and soutweast of Kashan. Unpublished MSc Dissertation, Tehran University (in Persian)Google Scholar
  75. Vaziri-Moghaddam H, Torabi H (2004) Biofacies and sequance strayigraphy of the Oligocene succession, Central basin, Iran. N Jb Geol Palaont Stuttgart 6:321–344Google Scholar
  76. Vaziri-Moghaddam H, Kimiagari M, Taheri A (2006) Depositional environment and sequence stratigraphy of the Oligo–Miocene Asmari Formation is SW Iran. Facies 52:41–51Google Scholar
  77. Vaziri-Moghaddam H, Seyrafian A, Taheri A, Motiei H (2010) Oligocene–Miocene ramp system (Asmari Formation) in the NW of the Zagros basin, Iran: Microfacies, paleoenvironment and depositional sequence. Rev Mexicana Cien Geol 27:56–71Google Scholar
  78. Wilson JL (1975) Carbonate facies in geological history. Springer, Heidelberg, p 471Google Scholar
  79. Wilson MEJ, Evans MEJ (2002) Sedimentology and diagenesis of tertiary carbonates on the Mangkalihat Penninsula, Boreneo: implications for subsurface reservoir quality. Mar Petrol Geol 19:873–900Google Scholar
  80. Zahedi M, Amidi SM (1991) Geological quadrangle map of Kashan. Scale 1:250000. Geological Survey of IranGoogle Scholar

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Ebrahim Mohammadi
    • 1
    Email author
  • Amrollah Safari
    • 2
  • Hossein Vaziri-Moghaddam
    • 2
  • Mohammad-Reza Vaziri
    • 1
  • Mehdi Ghaedi
    • 2
  1. 1.Department of Geology, Faculty of SciencesShahid Bahonar University of KermanKermanIran
  2. 2.Department of Geology, Faculty of SciencesUniversity of IsfahanIsfahanIran

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