Stratigraphy of Vali-Abad Section (Central Alborz– North Iran) Based on Corals

Kaveh Khaksar^1, , Fatemh Rezvannia² and M. R. Kebriaei-Zadeh²

¹Department of Soil & Water Science, Institute of Scientific Applied Higher Education of Jihad-e-Agriculture, Education and Extension Organization, Ministry of Agriculture, Karaj, Iran

²Departments of Geology, Payam-Nur University, Tehran Center, Iran

Cite this paper

Kaveh Khaksar, Fatemh Rezvannia and M. R. Kebriaei-Zadeh. Stratigraphy of Vali-Abad Section (Central Alborz– North Iran) Based on Corals. Journal of Geosciences and Geomatics. 2014; 2(3):120-124. doi: 10.12691/JGG-2-3-7

Abstract

The Mobarak Formation in the Vali-Abad section (Central Alborz-South of Chalus) was studied at the central Alborz. The stratigraphical section show regressive sequences from Tournaisian to Namurian?. Three main environments containing rugosa and tabulate corals were identified: open shelf, oolitic shoals and lagoon. Up to 25 species of rugosa and tabulate corals belonging to 16 genera have been identified: Zaphrentites parallela, Zaphrentites delanouei, Ampelexizaphrentis iraniense, Ampelexizaphrentis sp., Siphonophyllia cylindrica cylindrica, Siphonophyllia iranica, Siphonophyllia cf. dorlodoti, Kueichophyllum alborsense minor, Kueichophyllum alborsense major, Caninia aff. irinae, Dibonophyllum bipartitum, Quinghaiphyllum pygmaeum, Aullophyllidae sp. Kailingophyllum sp., Marzanophyllum chalusense, Marzanophyllum crassiseptum, Hapsiphyllum sp.1, Hapsiphyllum sp.2, Zaphrentoides sp.A, Zaphrentoides sp. B, Ufimia sp., Hapsiphyllidae indet., Syringopora sp., Michelinia sp. and Favosittidae indet. Coral assemblages allow us to distinguish three biozones, with local value. Lowermost assemblage is composed of small, solitary, undissepimented corals and it is typical open and deep platform. Corals at assemblage II are must diverse and abundant. This assemblage developed at shallow areas of the open shelf. Assemblage III proceed from lagoon and it is composed of small, solitary, undissepimented corals. Iranian Lower Carboniferous corals belong to shallow areas of open shelf-lagoon of unique oceans. Tournaisian- Namurian? platform are well-developed in the Alborz, Central Alborz and Baluchestan and rich in fossil corals. They are extended from southeast to northwest in the area of Lower Carboniferous deposition.

Keywords

corals, Tournaisian to Namurian?, Mobarak Formation, Vali-Abad section, Central Alborz, Iran

Copyright

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

References

[1]	Douglas, C., The Carboniferous and Permian faunas of South Iran and Iranian Baluchistan, 1948.
[2]	Flugel, H. W., Korallen aus der oberen Vise-Stufe (Kueichophyllum Zone) Nord Iran. -Jb. Geol. Bundesanst. 106, p.p.365-404, 1963.
[3]	Khaksar, K., New subfamily, genus and species of Lower Carboniferous rugose corals from central Alborz N. Iran. J. Sci. I. R. Iran, 7. (2), 97, 1996.
[4]	Khaksar, K., and Rezvannia, F., Upper Visean cyataxonia corals’ habitat from the Mobarak Formation deposits in the Vali-Abad section, Central Alborz, 32nd National Symposium and the 1st International Specialized Congress on Geoscience-nigcfr, Tehran-Iran, 2012.
[5]	Ahmadzadeh-Heravi, M., Study of brachipods and conodonts of Alborz Central, 111 p. (Copy without editorial reference), 1971.
[6]	Flugel, H. W., Neue korallen aus dem Palaozoikum Irans. – Sitzungsber. Osterr. Akad. Wiss. 200, 137-149, 1 Abb., 2 Taf., Wien, 1993.
[7]	Khaksar, K., Kebriaei, M. R. and Rezwannia, F., Environmental Evolution of Eastern and Central Alborz in the Lower Carboniferous based on Corals, 17th Symposium of Geological Society of Iran Oct. 29, Shahid Beheshti University, Tehran, Iran, 2013.
[8]	Vachard, D., New data on Foraminifera, Algae and Pseudo-Algae of the Visean and Bashkirian (Lower-Middle Carboniferous) from North Thailand. Geol. Jb. B37, 91-109, 3fig, 3 pl. Hannover 1990.