Document Type : Original Research Paper

Authors

• H Gholamalian ¹
• S Ghoreishi Maremy ²
• M Parvaneh Nezhad Shirazi ³

¹ Assistant Professor, Department of Geology, Faculty of Sciences, Hormozgan University, Bandar Abbas, Iran

² M.Sc. Students, Department of Geology, Payam Noor University, Shiraz Center, Shiraz, Iran

³ Assistant Professor, Department of Geology, Payam Noor University, Shiraz Center, Shiraz, Iran

Abstract

The Bahram Formation equivalent sequence in the Gerik section (eastern Zarand) displays middle Frasnian to early Famennian age on the basis of conodont investigation. Twenty-eight species and subspecies were identified. Seven biozones were recognized on the basis of vertical distribution of these taxa along the stratigraphic column; older than Upper hassi Zone, Upper hassi – jamieae zones, ?Lower rhenana Zone, Upper rhenana – linguiformis zones, Lower triangularis, Middle triangularis - Lower crepida zones, Middle – Upper crepida zones. Index conodont species those are recovered from the biostrome horizon in the lower part of section proved the middle Frasnian age (Upper hassi – jamieae zones). From view of conodont fauna, lithostatigraphy and age; the Gerik section is comparable with other successions of the Bahram Formation in Kerman, Tabas and Esfahan areas and shows a shallow sedimentary environment.

Keywords

• Late Devonian
• Bahram Formation
• Conodonts
• Biostratigraphy