Document Type : Original Research Paper
Authors
1 Ph.D. Student, Department of Geology, Islamic Azad University Science and Research Branch, Tehran, Iran
2 Associate Professor, Department of Geology, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran
3 Professor, Department of Geology, Islamic Azad University Science and Research Branch, Tehran, Iran
4 Ph.D., Geological Survey of Iran, Tehran, Iran
Abstract
The studied section is located in the vicinity of the village Daghal on the Zabol – Nehbandan road, 100 kilometersfrom Zabol. The strata under study are 55.57 meters thick here and lie nonconformably on the igneous rocks while the upper contact is now known. In this study the mentioned strata are divided into four units lithologically. The results of macroscopic and microscopic studies and the microfacies analysis show that the strata were deposited in four sub-environments including, lagoon, tidal channel, submarine fans and open marine. The thickness and extent of the marine sub-environment is greater than the other sub-environments. The study of microfacies and their constituent sub-environments implies that the mentioned section is formed in a homoclinal carbonate ramp. This study indicates that during the late cretaceous there was a relatively shallow sea covered the area. The existence of microfossils such as Orbitoeides, Omphalosyclus and globutruncana indicates the age of Maastrichtian for the rock unit studied.
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