M.R Partoazar; B Hamdi; S.A Aghanabati
Abstract
Foraminiferal contents of the Permian strata of the Kuh-e Baghvang in central Iran has been investigated. The section is located some 45Km Northwest of Tabas and south of Shirgeshtvillage. The Permian deposits of the Jamal Fm. with a thickness of 270 meters are underlain by the Sardar Fm. disconformably ...
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Foraminiferal contents of the Permian strata of the Kuh-e Baghvang in central Iran has been investigated. The section is located some 45Km Northwest of Tabas and south of Shirgeshtvillage. The Permian deposits of the Jamal Fm. with a thickness of 270 meters are underlain by the Sardar Fm. disconformably and in turn overlain by the Lower Triassic deposits of Sorkh shale Formation. A total of 124 rock samples have been systematically taken from various layers for an accurate biostratigraphic study. Forty one genera and 48 species of Foraminifera and 10 generaand 12 species of Algae have also been determined through this study. According to the index fossils, geochronology of Member 1 and Member 2 of the Jamal Fm. is attributed to Early Murgabian. Moreover, according to the biostratigraphic study, some index fossils of Fusulinidae have been recorded and the following assemblage zones have been differentiated which are equivalent to international biozones of Leven(1975 and Ishii (1975). Paradunbarula – Geinitzina Assemblage Zone (Murgabian) Dagmarita – Paraglobivalvulina Assemblage Zone (Dzhulfian) Colaniella – Reichelina Assemblage Zone (Changxingian).
S Rahimi; A Sadeghi; M.R Partoazar
Abstract
In this research, the biostratigraphy of the Gurpi Formation in Kuh-e-Sefid section in east of Ramhormoz is studied. The thickness of the Gurpi Formation is 190.5m and consists mainly of shale, argillaceous limestone and marl. The lower boundary with the Ilam Formation is comformable with sharp lithology ...
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In this research, the biostratigraphy of the Gurpi Formation in Kuh-e-Sefid section in east of Ramhormoz is studied. The thickness of the Gurpi Formation is 190.5m and consists mainly of shale, argillaceous limestone and marl. The lower boundary with the Ilam Formation is comformable with sharp lithology and upper boundary with the Pabdeh Formation is unconformable with a gap between Late Maastrichtian and Late Paleocene. In this study, 47 species belonging to 17 genera and 8 biozones of planktonic foraminifera were recognized. The biozones consist of Dicarinella asymetrica zone, Globotruncanita elevate zone, Globotruncana ventricosa zone, Radotruncana calcarata zone, Globotruncanella havanensis zone, Globotruncana aegyptiaca zone, Gansserina gansseri zone, and Racemiguembelina fructicosa zone. The age of the Gurpi Formation based on these biozones is Late Santonian to Late Maastrichtian in this section.
