Examine the structural and stratigraphical evolution of the Assam Basin: Statement I: The Assam Basin is an asymmetric petroliferous basin situated at the northeastern extremity of the Indian craton, bounded by the Eastern Himalaya to the north and the Indo-Burman ranges to the east and south. Statement II: Tertiary sedimentary sequences within the Assam Basin, particularly the Oligocene-Miocene Barail and Tipam groups, host significant commercial hydrocarbon reserves. Which of the following is correct?

💡 Solution & Explanation

Statement I is correct because the Assam Basin represents a major petroliferous geologic province shaped by complex tectonic interactions between the Indian plate, the Eurasian plate, and the Burma microplate. Statement II is also correct, as prolific oil and natural gas accumulations are trapped within Tertiary sandstone reservoirs belonging to the Barail, Tipam, and Surma groups, discovered historically in fields such as Digboi, Naharkatia, and Moran. This basin is a cornerstone of India's onshore oil production.