Mumbai High is famous as an important source of

1. Mumbai High is a large offshore oil field in the Arabian Sea. 2. It lies about 160 km off the Mumbai coast. 3. Discovered in 1974 and operated by ONGC; it is India's largest offshore oil field. 4. Bassein and other adjacent offshore blocks add gas production. _Source: syllabus Social Science (Geography), Ch 5 "Minerals and Energy Resources", §5.3_