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petrogenesis

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

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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
petrogenesis in Science

petrogenesis

[pĕt′rō-jĕnĭ-sĭs]
  1. 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.