Nannostratigraphy of Gurpi Formation in southeast of Shiraz

In this study، Gurpi Formation at Mook section has been sampled and studied. Taxonomical studies of calcareous nannofossils lead to identification of 23 genera and 44 species at the Mook section. According to the first occurrence of index species and fossil assemblages، seven calcareous nannofossil biozones (CC21- CC26 of Sissingh، 1997) and biozone NP1 of Martini (1971) equivalent to biozone CP1a of Okada and Bukry (1980) at the Mook section have been recognized. Based on these biozones، age of the Gurpi Formation in SE of Shiraz، is Late Campanian to Early Danian. On the bases of paleoecological interpretation، Gurpi Formation at the Mook section was deposited in low latitude and deep marine environment. But، the depth of the basin decreases toward the top of the Gurpi Formation at this section.