Gamma-ray, stable carbon and oxygen isotope chemostratigraphy and sequence stratigraphy of the Lower Mahil Formation (KS-1 Khuff-Equivalent), Northern Oman oleh Mohamed S. H. Moustafa, Rasha Al Raqaishi, Mohamed A. K. El-Ghali, Mohamed A. K. El-Ghali, Mohamed Gharbi, Iftikhar Ahmed Abbasi, Aaraf Al Humaidi, Nada Al Ghafri, Marwa Musallam Alshukaili, Hezam Al-Awah