رخدادهای زیستی سنگ های فامنین ناحیه میغان در البرز شرقی

Abstract:

Iron-rich concentrated remains related to defferent marine biota in the age of Famennian from Morocco and Iran was analysed and controlled regarding to the geochemical changes after depositional time. Neutron activation analysis results of biota remains collected from Morocco and Meyghan section shows similarity between chemical component and trace elements as: the percentage of titanium dioxide and lutetium. This similarity shows that iron-rich nuggets ( most of them are biota remains ) may be depositd in deep and poor-oxygenated materials. Hematitic fossilized Famannian species related to the ammonoid family Cymaclymeniide (Cymaclymenia cf. pudica ). This phenomena can be followed in the Khosh-yielagh ara as well.