A major episode of plate tectonic activity in which lithospheric plates collide and produce mountain belts, in some cases including the formation of subduction zones and igneous activity. Thrust fault [..]

"mountain forming," 1890, from French orogénie; see oro- + -geny. Related: Orogenic.

the way mountains are formed.

(Gk: oros=mountain; geny=forming) a period of mountain building which could last for millions of years. orogenesis is the process of mountain building, such as folding, faulting and thrusting of the e [..]

This is the process of mountain building or orogenesis.  An orogeny is a period of time where mountain building occurs.

(n) the process of mountain formation (especially by the upward displacement of the earth's crust)

The tectonic processes of folding, faulting, and uplifting of the Earth’s crust that result in the formation of mountains.

The geological term for mountain building, and it is usually associated with a specific historic event such as the Antler orogeny, or the Taconian orogeny.

An episode of mountain building and/or intense rock deformation.

A mountain-building episode in which large sections of the Earth’s crust are uplifted. Example: The Laramide Orogeny that created North America’s modern Rocky Mountains.

period of mountain-building.

(geology) the process of mountain building by the upward folding of the Earth's crust. * '''2004''', Richard Fortey, ''The Earth'', Folio Society 2011, p. 102: *: When I asked Geoff Milnes what ag [..]