the branch of geology that studies rocks: their origin and formation and mineral composition and classification
同义词：lithology
petrology详细解释
pe.trol.o.gy n.Abbr. petr.,petrol.（名词）缩写 petr.,petrol.The branch of geology that deals with the origin, composition, structure, and alteration of rocks.岩石学：地质学的一个分支，研究岩石的起源、成分、结构和演变 【引伸】 pet.rolog.ic pet.rolog.ically adv.（副词）petrol.ogist n.（名词）
