Abstract
The palynological and biostratigraphical studies have been carried out on 59 subsurface cutting samples from three formations (Khoman, Apollonia and Dabaa) represent the Santonian-Oligocene succession of the Drazia-1 well in East Yidma oil field (north Western Desert, Egypt). A total of 115 dinoflagellate cysts species have been identified and utilized in distinguishing five interval dinoflagellate cyst zones for the first time in the Western Desert from old to young: 1) Odontochitina operculata (Santonian-Campanian), 2) Cerodinium diebelii (Maastrichtian), 3) Danea californica (Danian-Selandian), 4) Apectodinium homomorphum (Thanetian–Bartonian), and 5) Deflandrea phosphoritica (Priabonian-Chattian). The established palynozones have been correlated with equivalent Late Cretaceous-Paleogene dinocyst biozones in Egypt and worldwide.
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