coal petrology
science that deals with the origin, history, occurrence, structure, chemical composition and classification of coal
en-GB/ˈkəʊl pɪtɹɒləd͡ʒiː/
en-US/ˈkoʊl pɪˈtɹɑləd͡ʒi/
science that deals with the origin, history, occurrence, structure, chemical composition and classification of coal