Arêtes (Glacial landforms)

LC control no.	sh2016002713
Topical heading	Arêtes (Glacial landforms) *Browse this term in* LC Authorities or the LC Catalog
Variant(s)	Arrises (Glacial landforms)
See also	Glacial landforms *Browse this term in* LC Authorities
Found in	Work cat: Montana Memory Project website, November 16, 2016: Archival Photographs from the University of Montana, Morton J. Elrod Papers ; Mss 486. Description of digitized photo "Grinnell Glacier and snowy Garden Wall." (Glacier National Park, Montana, Grinnell Glacier and a snowy Garden Wall.) National Snow & Ice Data Center website, accessed November 29, 2016: Glacier Landforms: Arêtes, Horns & Cirques ("The "Garden Wall" formation in Glacier National Park, Montana, shows the sharp, knife-like ridge of rocks characteristic of arêtes.") Encyclopaedia Britannica online, accessed November 29, 2916: Arête ("In geology, a sharp-crested serrate ridge separating the heads of opposing valleys (cirques) that formerly were occupied by Alpine glaciers. It has steep sides formed by the collapse of unsupported rock, undercut by continual freezing and thawing (glacial sapping). Two opposing glaciers meeting at an arête will carve a low, smooth gap, or col. An arête may culminate in a high triangular peak or horn formed by three or more glaciers eroding toward each other.") Neuendorf, et al. Glossary of Geology, 5th edition. 2005: Arête ("A narrow serrate mountain crest or rocky sharp-edged ridge or spur, commonly present above the snowline in rugged mountains (as in the Swiss Alps) sculptured by glaciers, and resulting from the continued backward growth of the walls of adjoining cirques. Syn.: crib [glac geol], arris."); Arris ("A term used in the English Lake District for arête."); Crib [glac geol] ("A Welsh term for arête."); Grat ("A term used in the Alps for a small, lateral arête.")