orogen

[ awr-uh-jen, -juh n, ohr- ]
/ ˈɔr əˌdʒɛn, -dʒən, ˈoʊr- /

noun Geology.

an extensive belt of rocks deformed by orogeny, associated in places with plutonic and metamorphic rocks.

Origin of orogen

< German (1921); see oro-1, -gen