Biostratigraphy of the Qom Formation in Chenar area (northwest of Kashan) and correlation with some other parts of central Iran

رخساره‌های رسوبی

Article 3, Volume 3, Issue 2, October 2010, Pages 31-40   

Document Type: مقالات پژوهشی

DOI: 10.22067/sed.facies.v3i2.7779

Authors

Elham Behforouzi^* ; Amrollah Safari; Hossein Vaziri-Moghaddam

Abstract

In this research, biostratigraphy of the Qom Formation in Chenar area (northwest of Kashan) was studies. The thickness of the formation in this section is 147m. It mainly consists of marly limestone and medium to massive limestone. In this section, the Qom Formation nonconformably lies between Eocene Volcanic at the base, and recent alluvium at the top. 112 samples were taken from the studied section led to identification of 28 genera and 38 species. Because of naught identification a formal biozonation for Qom Formation and similarity of the assemblage recorded to these recorded from Asmari Formation study (wynd, 1965) and (Laursen and et al. 2009) the published for the Asmari Formation used here. Based on idestified foraminifera the age of the Qom Formation in the studied section is Oligocene (Rupelian- Chattian). Based on the recognized foraminifera section is comparable to: Lepidocyclina- Operculina- Ditrupa- Assemblage Zone Sections of study trend are parallel with main sedimentation trend of the Qom Formation. Sedimentation of the Qom Formation continued to Aqutanian southeast ward.

Keywords

Biostratigraphy; Qom Formation; Benthic foraminifera; Oligocene; Aqutanian

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