the world > the earth > structure of the earth > formation of features > tectonization or diastrophism > 			[noun]		 > orogenesis > specific (3)		
the formation of the Appalachian Mountains in eastern North America.
Of, pertaining to, or designating the orogeny during which the mountain ranges in the west of the Americas, or the Rocky Mountains in particular…
Geology. The Acadian orogeny.