Diagenesis, Depositional Model and Stratigraphic Evolution of the Margalla Hill Limestone, Southeast Hazara

The purpose of this abstract is to evaluate the depositional and diagenetic model of Early Eocene Margalla Hill Limestone. Four sections of subjected formation have been studied for samples collection and outcrop measurements. Detailed microscopic analysis of thin sections enabled us to characterize the subjected limestone into three microfacies. By studying the microfacies, I became able to interpret the depositional model, diagenetic variations, primary and secondary porosity and sequence stratigraphy of the formation. Syndiagenetic changes in the subjected limestone make it available to act as potential reservoir and these changes include physical and chemical compaction, neomorphism and dissolutioning etc. Moreover, by analyzing the described microfacies, I made able to say that Margalla Hill Limestone was being deposited on carbonate shelf from inner ramp to outer ramp setting. Sequence stratigraphic analysis represents deposition on high stand system tract (HST).