pe·trol·o·gy /pəˈtrɑləʤi, pɛ-/
巖石學
Pe·trol·o·gy n.
1. The department of science which is concerned with the mineralogical and chemical composition of rocks, and with their classification: lithology.
2. A treatise on petrology.
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petrology
n : the branch of geology that studies rocks: their origin and
formation and composition