petrogenesis

noun
pet·ro·gen·e·sis | \ˌpe-trō-ˈje-nə-səs \

Definition of petrogenesis 

: the origin or formation of rocks

Other Words from petrogenesis

petrogenetic \ˌpe-trō-jə-ˈne-tik \ adjective

First Known Use of petrogenesis

1886, in the meaning defined above

History and Etymology for petrogenesis

New Latin

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The first known use of petrogenesis was in 1886

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