Andrei Icefield

{{Short description|Icefield in British Columbia, Canada}}

{{Infobox glacier

| name = Andrei Icefield

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| photo_caption = Satellite imagery of the Andrei Icefield

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| location = British Columbia, Canada

| coordinates = {{coord|56|53|34|N|131|13|52|W|format=dms|display=inline,title}}

| map = Canada British Columbia

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| map_caption = Location in British Columbia

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| terminus = Outflow glaciers

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The Andrei Icefield is a large icefield in the Boundary Ranges of the Coast Mountains in northwestern British Columbia, Canada. It is located {{convert|130|km|mi|abbr=on}} northwest of the community of Stewart in Cassiar Land District. The icefield is the source of many valley glaciers, including Hoodoo Glacier and Twin Glacier, which lie at the headwaters of Hoodoo River and Twin River, respectively.{{cite book|last1=Kargel|first1=Jeffery S.|last2=Leonard|first2=Gregory J.|last3=Wheate|first3=Roger D.|last4=Edwards|first4=Benjamin|title=Global Land Ice Measurements from Space|chapter=ASTER and DEM Change Assessment of Glaciers Near Hoodoo Mountain, British Columbia, Canada|publisher=Springer Science+Business Media|pages=354, 364|year=2014|doi=10.1007/978-3-540-79818-7_15|isbn=3-662-50130-9}} Between these two glaciers is Hoodoo Mountain, a flat-topped stratovolcano of the Northern Cordilleran Volcanic Province.{{cite web|title=Hoodoo Mountain, NW British Columbia, Canada|publisher=Oregon State University|url=http://volcano.oregonstate.edu/vwdocs/volc_images/north_america/canada/Final-Hoodoo.html|access-date=2021-09-22|url-status=dead|archive-url=https://web.archive.org/web/20090411062636/http://volcano.oregonstate.edu/vwdocs/volc_images/north_america/canada/Final-Hoodoo.html|archive-date=2009-04-11}} Other glaciers originating from the Andrei Icefield include Andrei Glacier, Porcupine Glacier, Johnson Glacier and Choquette Glacier, the latter of which lies at the headwaters of Choquette River.{{cite web|title=The Atlas of Canada - Toporama|url=https://atlas.gc.ca/toporama/en/index.html|publisher=Natural Resources Canada|access-date=2021-09-22}}{{cite bcgnis|id=5918|name=Choquette Glacier|access-date=2021-09-22}}

The western end of the Andrei Icefield contains several named mountains, including Mount Robertson, Pheno Mountain, Big Mountain, Mount Verrett, Surprise Mountain, Mount Turner, Mount McGrath, Mount Laura, Mount Choquette, Sugarloaf Mountain, Warm Spring Mountain, Middle Mountain, The Knob and Eagle Crag. Underlying the icefield are Triassic volcanic rocks comprising the Stikinia terrane. Uranium–lead dating has yielded crystallization ages of around 218 to 223 million years.{{cite web|last1=Joyce|first1=Nancy|last2=Zagorevski|first2=Alex|last3=Mihalynuk|first3=Mitch|last4=Friedman|first4=Richard|url=https://ctw2015.weebly.com/uploads/4/0/7/6/40761115/ctw2015_abstract_booklet_final.pdf|title=Geochronology of the Late Triassic Stuhini arc in northwestern British Columbia|publisher=University of Calgary|year=2015|page=37|access-date=2021-09-22}}

The Andrei Icefield is larger than the Columbia Icefield in the Canadian Rockies.{{cite book|last=Sandford|first=Robert William|title=The Columbia Icefield|publisher=Rocky Mountain Books|page=22|year=2016|isbn=978-1-77160-154-2}} It is named after the son of Olav Mokievsky-Zubok, a glaciologist who carried out significant glaciological work in the Coast Mountains from the 1960s to the 1970s.