Early Carboniferous Brachiopod Assemblages from the Mobarak Formation in Labrud Section, Northern Damghan

Aghababalou, B; Khosrotehrani, Kh; Hoseininezhad, S.M

doi:10.22071/gsj.2015.42561

Early Carboniferous Brachiopod Assemblages from the Mobarak Formation in Labrud Section, Northern Damghan

Document Type : Original Research Paper

Authors

B Aghababalou ¹

Kh Khosrotehrani ²

S.M Hoseininezhad ³

¹ Ph. D. Student, Department of Geology, Islamic Azad University, Science and Research Branch, Tehran, Iran.

² Professor, Department of Geology, Islamic Azad University, Science and Research Branch, Tehran, Iran

³ Assistant Professor, Faculty of Earth Science, Damghan University, Damghan , Iran

10.22071/gsj.2015.42561

Abstract

The early Carboniferous Mobarak Formation is well exposed in the north of Damghan. It consists of fossiliferous limestone, marly limestone and grey shales. 31 species from 23 genera including: Rossirhynchus adamantinus (Gaetani, 1964), Tomiproductus elegantulus (Tolmmachev, 1924), Pustula cf. altaica (Tolmachev, 1924), Leptagonia analoga (Phillips, 1841), Hemiplethrorhynchus crassus (Gaetani, 1968), Tylothyris cf. planimedia (Cvancara, 1958), Lamellosathyris aff. Lamellose (Leveille, 1835),Punctospirifer aff. Scabricosta (North, 1920) have been identified from the Labrud section. Four brachiopod assemblage zones show spanning from the Tournaisian to early Visean. The Mobarak Formation at this section overlies the Geirud Formation conformably and underlies the Dorud Formation(?) disconformably.

Keywords

Brachiopods

Mobarak Formation

Assemblage Zone

Damghan