The Palaeozoic rock units mainly, Ghelli, Niur, Padeha, Khoshyeilagh and Mobark formations are well-exposed in the north of Robat-e Gharabil village. 116 out of 157 surface samples were analyzed to determine aged relationships of Ghelli Formation. The samples of Ghelli Formation are dominated by acritarchs (42 species belonging to 23 genera) and chitinozoans (26 species distributing among 15 ge...

The basal Cambrian is characteristic for the appearance of small shelly fossils and acanthomorphic acritarchs with relatively vesicles. In Tarim Block (NW China) South China, this microfossil assemblage dominated by acanthomorphs was referred to as ‘Micrhystridium-Paracymatiosphaera-Megathrix’ (MPM) association, based on microfossils from lower Yurtus Xishanblaq formations Block. This study pro...

Well-preserved miospore assemblages are recorded from the Late Ordovician (Katian-Hirnantian), Ghelli Formation in Pelmis-gorge at the north-eastern Alborz Mountain The palynomorphs were extracted from siliciclastic deposits which are well-dated by using of marine palynomorphs (acritarchs and chitinozoans). The encountered miospore assemblages consist of 14 genera (28 species: 26 cryptospores a...