1890, "mountain-forming, the formation of mountains," from French orogénie; see oro- + -geny. In reference to particular mountain-building geological periods, by 1914. Related: Orogenic (1886); orogenesis (1886).
word-forming element meaning "genesis, origin, mode of production," forming corresponding abstract nouns to words in -gen, from French -génie and Modern Latin -genia, from Greek -geneia, from -genes "born, produced," the form in compounds of genos, from PIE root *gene- "give birth, beget," with derivatives referring to procreation and familial and tribal groups.
<a href="https://www.etymonline.com/word/orogeny">Etymology of orogeny by etymonline</a>
Harper, D. (n.d.). Etymology of orogeny. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/orogeny