petrogenesis [pe-troh-jen-uh-sis] WORD ORIGIN noun the branch of petrology dealing with the origin and formation of rocks. the origin and formation of rocks.

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  • Origin of petrogenesis First recorded in 1900–05; petro-1 + -genesis Also called pe·trog·e·ny [pi-troj-uh-nee] /pɪˈtrɒdʒ ə ni/. Related formspet·ro·ge·net·ic [pe-troh-juh-net-ik] /ˌpɛ troʊ dʒəˈnɛt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 petrogenesis in Science petrogenesis [pĕt′rō-jĕn′ĭ-sĭs] The branch of petrology that deals with the origin and formation of rocks, especially igneous rocks. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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