Crossword clue: the branch of geology that studies rocks: their origin and formation and mineral composition and classification

The most common answer is lithology (9 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

lithology 9 letters wn-def

the branch of geology that studies rocks: their origin and formation and mineral composition and classification

petrology 9 letters wn-def

the branch of geology that studies rocks: their origin and formation and mineral composition and classification