Most of Gujarat's onshore oil and natural gas reserves are concentrated in which geological basin?

The correct answer is Cambay Basin. Key Points The Cambay Basin (also known as the Khambhat Basin) is an elongated Cenozoic rift basin in Gujarat that is rich in hydrocarbons. It extends onshore across districts like Ahmedabad, Mehsana, Bharuch, and Anand, and offshore into the Gulf of Khambhat. Major oil and gas fields like Ankleshwar, Kalol, and Gandhar are part of this specific geological formation. This basin is the reason Gujarat is the second-largest onshore producer of oil and gas in India. Additional Information Krishna-Godavari Basin: Located on the eastern coast of India (Andhra Pradesh), it is famous for massive offshore natural gas discoveries. Cauvery Basin: Situated in Tamil Nadu and Puducherry, it is a significant producer of oil and gas on the southeastern coast. Assam-Arakan Basin: The oldest hydrocarbon province in India, located in the northeast, where the first oil well was drilled.