Orogens vs Orogeny - What's the difference?
orogens | orogeny |
(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 age the rocks were before they were turned into uncompromising gneisses by the Alpine orogeny he made a rueful face.