فهرس المقالات mass extinction حرية الوصول المقاله صفحة الملخص نص كامل 1 - Biostratigraphic Correlation of Elikah Formation in Zal Section (Northwestern Iran) with Ruteh and Type Sections in Alborz Mountains Based on Conodonts Nazanin BadriKolalo Bahaeddin Hamidi Seyed Hamid Vaziri Seyed Ali Aghanabati