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Economic geology

branch of geology concerning the scientific study of the formation, location, and use of marketable geologic materials including fuels, metals, minerals, and water.

Pronunciation
/ˌɛkəˈnɑmɪk ʤiˈɑləʤi/
/ˌiːkəˈnɒmɪk ʤɪˈɒləʤi/