_:b1217027 . _:b1217027 "A thin, almost knife-like, ridge of rock which is typically formed when two glaciers erode parallel U-shaped valleys. The arte is a thin ridge of rock that is left separating the two valleys. Artes can also form when two glacial cirques erode towards one another, although frequently this results in a saddle-shaped pass, called a col."^^ . _:b1217027 "Wikipedia:Arete_%28landform%29"^^ . _:b1217027 . _:b1217027 .