معرفي جنس ها و گونه هاي جديد فوزوليناسه آي سنگ هاي پرمين ناحيه شيرگشت

Introducing of the New Genera and Species of Fusulinacea in the Permian Rocks, Shirgesht Area

Fusulinacea are neumerous and diverse in the Permian rocks of Iran. In Shirgesht area (Baghe-Vang section), the lower part of the Jamal Formation is composed of shale, marl and intercalation of biogenic limestones. The limestone beds contain numerous Shwagerinids, including the Bolorian species. In the upper part, with increasing water depth, the abundance of fusulinids decrease and only small fusulinids (family Ozawainellidae) are present. The textural rocks and accompany of sponge spicules and radiolaria indicate a relatively deeper marine environment for deposition of the sediments. Detailed study of schwagerinid of the basal section has led to the introduction of new genus of Iranella and Paraleeina. This genus is similar to Paraschwagerina, except the fact that Paraschwagerina lack cuniculi and are not found in sediments younger than Sakmarian.