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From French orogénie, from Ancient Greek ὄρος (óros, mountain, high ground) + γενεια (geneia, creation, birth, making). Surface etymology is oro- +‎ -geny.


  • (UK) IPA(key): /ɒˈɹɒdʒɪni/, /əˈɹɒdʒɪni/


orogeny (countable and uncountable, plural orogenies)

  1. (geology) The process of mountain building by the upward folding of the Earth's crust.
    • 1993, P. A. Cawood, Acadian orogeny in west Newfoundland: Definition, character, and significance, David C. Roy, James William Skehan (editors), The Acadian Orogeny: Recent Studies in New England, Geological Society of America, page 138,
      The effects of Acadian orogeny are concentrated in central Newfoundland, decreasing in intensity to the east and west (Williams, this volume).
    • 2004, Richard Fortey, The Earth, Folio Society 2011, p. 102:
      When I asked Geoff Milnes what age the rocks were before they were turned into uncompromising gneisses by the Alpine orogeny he made a rueful face.
    • 2009, Robert S. Hildebrand, Did Westward Subduction Cause Cretaceous-Tertiary Orogeny in the North American Cordillera?, Geological Society of America, page 5,
      In Canada the fold-thrust belt formed during what is termed the Columbian orogeny (Monger and Price, 2002). Because the Sevier and Columbian orogenies were contemporaneous and constitute a single continuous and linear belt of rocks and structures, I use the term Cordillera orogeny to refer to the Cretaceous deformation that created the entire belt, whereas the term Laramide is used only to refer to a series of Late Cretaceous—Tertiary basement-involved uplifts, for the most part located in the Rocky Mountain foreland east of the fold-thrust belt and mainly south of the Lewis and Clark lineament (Fig. 1) in keeping with the original definition by Armstrong (1968).

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