%0 Conference Proceedings %T The study of chert nodules in the Sardar Formation, Ozbak-Kuh mountains ,north Tabas %A Khanehbad, Mohammad %A Moussavi Harami, Sayyed Reza %A Mahboubi, Asadollah %A Nadjafi, Mehdi %A Mahmudy Gharaie, Mohamad Hosein %J 1th international geological congress %D 2010