petrogenesis

== English == === Etymology === From petro- +‎ -genesis, originally as a calque of earlier German Petrogenese and Petrogenesis. === Pronunciation === (General American) IPA(key): /ˌpɛtɹoʊˈd͡ʒɛnəsɪs/ === Noun === petrogenesis (usually uncountable, plural petrogeneses) Rock formation, especially the formation of igneous or metamorphic rocks. The study of the origin of rocks, especially igneous and metamorphic rocks. ==== Synonyms ==== (formation of rocks): rock formation, petrogeny ==== Hypernyms ==== (study of rock formation): petrology, geology ==== Related terms ==== === References === “petrogenesis, n.”, in OED Online ⁠, Oxford: Oxford University Press, 2022.