| Term / Izraz | Arête (Francosko) / Grat (Nemško) |
| Classification | Geomorphology / Glaciology |
Arête je ozek skalnat greben med dvema ledeniškima dolinama.
Tipični nastanek je, ko ledeniki erodirajo dve vzporedni ledeniški dolini v obliki črke U. Arêtes se lahko oblikujejo tudi, ko dve ledeniški krnici erodirata z glavo ena proti drugi, čeprav pogosto to povzroči prehod v obliki sedla, imenovan COL. Rob med dolinama se nato izostri s periglacialnim delovanjem, naklon na obeh straneh arête pa postane strmejši. Beseda arête izhaja iz francoščine in pomeni "rob" ali "greben".
Kjer se srečajo tri ali več krnic, nastane piramidalni vrh; zgled je vrh gore Matterhorn.
An arête is a sharp rugged mountain ridge inbetween two glacial shaped valleys, produced by glaciation.
It is typically formed when two glaciers erode parallel U-shaped valleys. Arêtes can also form when two glacial cirques erode headwards towards one another, although frequently this results in a saddle-shaped pass, called a col. The edge is then sharpened by freeze-thaw weathering, and the slope on either side of the arête steepened through mass wasting events. Similar features in the Alps are often described with the German equivalent term Grat.
Where three or more cirques meet, a pyramidal peak is created, such as the Matterhorn.