petrology

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The Simple English Wikipedia has an article on:

Petrology

Pronunciation change

(UK) IPA ^(key): /pɪˈtrɒl.ə.d͡ʒi/
(US) IPA ^(key): /pəˈtrɑl.ə.d͡ʒi/
Audio (UK) (file)

Noun change

Singular
petrology

Plural
none

(geology) Petrology is the study of the origin, composition and structure of rock.

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