Powder Mountain Icefield
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The Powder Mountain Icefield, also called the Powder Mountain Icecap and the Cayley Icefield, is a glacial field in the
Pacific Ranges , photo = Mount Garibaldi (50997016501).jpg , photo_size = 280px , photo_caption = Mount Garibaldi massif as seen from Squamish , map = , map_image = South BC-NW USA-relief PacificRanges.png , m ...
of southwestern
British Columbia, Canada British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, for ...
, about west of Whistler and about north of
Vancouver Vancouver ( ) is a major city in western Canada, located in the Lower Mainland region of British Columbia. As the List of cities in British Columbia, most populous city in the province, the 2021 Canadian census recorded 662,248 people in the ...
. On the west side of the icefield is the valley of the
Squamish River The Squamish River is a short but very large river in the Canadian province of British Columbia. Its drainage basin is in size. The total length of the Squamish River is approximately . Course The Squamish River drains a complex of basins in the ...
, while on its east is the
Callaghan Valley The Callaghan Valley is located in the Sea to Sky Country of southwestern, British Columbia, in the Pacific Ranges of the Coast Mountains 90 km north of Vancouver. It was the home of the 2010 Winter Olympics's Whistler Olympic Park, the venu ...
, which is the setting for the Nordic facilities for the
2010 Winter Olympics )'' , nations = 82 , athletes = 2,626 , events = 86 in 7 sports (15 disciplines) , opening = February 12, 2010 , closing = February 28, 2010 , opened_by = Governor General Michaëlle Jean , cauldron = Catriona Le May DoanNancy GreeneWayne Gretz ...
. The icefield is studded by several volcanic formations, including active
Mount Cayley Mount Cayley is an eroded but potentially active stratovolcano in the Pacific Ranges of southwestern British Columbia, Canada. Located north of Squamish and west of Whistler, the volcano resides on the edge of the Powder Mountain Icefield. ...
. Other summits are
Powder Mountain Powder Mountain is a ski resort east of Eden, Utah, stretching between Weber and Cache counties and from Salt Lake City International Airport. Covering , Powder Mountain is the largest ski resort in the US by skiable acreage. The resort has 15 ...
,
Brandywine Mountain Brandywine Mountain, , is a summit in the Powder Mountain Icefield of the Pacific Ranges of the Coast Mountains of southwestern British Columbia, Canada, about west of the resort town of Whistler. Its name is derived from that of Brandywine Fa ...
and
Mount Fee Mount Fee is a volcanic peak in the Pacific Ranges of the Coast Mountains in southwestern British Columbia, Canada. It is located south of Callaghan Lake and west of the resort town of Whistler. With a summit elevation of and a topographic ...
.
Mount Callaghan Mount Callaghan is a volcanic peak located east of the headwaters of the Squamish River, just northeast of the Powder Mountain Icefield and just south of the Pemberton Icefield in the Sea to Sky Country of southwestern British Columbia, Canada, ...
, a dormant volcano, is just northeast of the icefield. Mount Brew is just to its south.


Geology

Numerous
subglacial eruption Subglacial eruptions, those of ice-covered volcanoes, result in the interaction of magma with ice and snow, leading to meltwater formation, jökulhlaups, and lahars. Flooding associated with meltwater is a significant hazard in some volcan ...
s beneath the Powder Mountain Icefield have formed many distinctive
subglacial volcano A subglacial volcano, also known as a glaciovolcano, is a volcanic form produced by subglacial eruptions or eruptions beneath the surface of a glacier or ice sheet which is then melted into a lake by the rising lava. Today they are most ...
es in the
Mount Cayley volcanic field The Mount Cayley volcanic field (MCVF) is a remote volcanic zone on the South Coast of British Columbia, Canada, stretching from the Pemberton Icefield to the Squamish River. It forms a segment of the Garibaldi Volcanic Belt, the Canadian portion ...
and contain abundant glass and fine-scale jointing from rapid cooling of
lava Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or un ...
, such as
Ember Ridge Ember Ridge is a volcanic mountain ridge associated with the Mount Cayley volcanic field in British Columbia, Canada. Ember Ridge is made of a series of steep-sided domes of glassy, complexly jointed, hornblende-phyric basalt with the most recent e ...
and Slag Hill.Preliminary petrography and chemistry of the Mount Cayley volcanic field, British Columbia
/ref> Mineralogically, the volcanics range from
andesite Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predomi ...
to
rhyodacite Rhyodacite is a volcanic rock intermediate in composition between dacite and rhyolite. It is the extrusive equivalent of those plutonic rocks that are intermediate in composition between monzogranite and granodiorite. Rhyodacites form from rapid ...
, and chemically, the rocks span a range from andesite to
dacite Dacite () is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. ...
. Glassy
volcanic rock Volcanic rock (often shortened to volcanics in scientific contexts) is a rock formed from lava erupted from a volcano. In other words, it differs from other igneous rock by being of volcanic origin. Like all rock types, the concept of volcanic r ...
s are abundant, with glass contents as high as 70%. Volcanoes such as the Slag Hill tuya were formed when
magma Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural sa ...
intruded Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form '' intrusions'', such as batholiths, dikes, sills, laccoliths, and volcanic necks.Intrusive RocksIntrusive rocks accessdate: March ...
into and melted a vertical pipe in the overlying Powder Mountain Icefield. The partially molten mass cooled as a large block, with gravity flattening its upper surface, forming its flat-topped, steep-sided subglacial volcanic edifice. The latest volcanic activity in the Powder Mountain Icefield has occurred in the past 10,000 years.


Development proposal

The icefield was one of several locations in the southern Coast Mountains that attracted ski resort development interest as a result of the success of the nearby
ski resort A ski resort is a resort developed for skiing, snowboarding, and other winter sports. In Europe, most ski resorts are towns or villages in or adjacent to a ski area – a mountainous area with pistes (ski trails) and a ski lift system. In North ...
town at
Whistler, British Columbia Whistler ( Lillooet/Ucwalmícwts: Cwitima, ; Squamish/Sḵwx̱wú7mesh: Sḵwiḵw, ) is a resort municipality in Squamish-Lillooet Regional District, British Columbia, Canada. It is located in the southern Pacific Ranges of the Coast Mounta ...
. A proposal call in 1985 was won by Powder Mountain Resorts, who won approval in principle from the provincial government for its project design, which included a small basetown at Callaghan Lake. In 1987, Forests and Lands Minister
Jack Kempf Jack Joseph Kempf (May 12, 1935 - July 1, 2003) was a business owner and politician in British Columbia. He represented Omineca in the Legislative Assembly of British Columbia from 1975 to 1991 as a Social Credit member. He was born in Kelowna ...
was instructed by then-Premier
Bill Vander Zalm William Nicholas Vander Zalm (born Wilhelmus Nicholaas Theodore Marie van der Zalm; May 29, 1934) is a politician and entrepreneur in British Columbia, Canada. He was the 28th premier of British Columbia from 1986 to 1991. Early life Wilhelmus Ni ...
to "cease and desist" in favour of Callaghan Resorts Inc., which was backed by then-Attorney-General Les Peterson. Court action for breach of contract and abuse of office taken by Powder Mountain Resort promoters Nan and Dianne Hartwick was dismissed by the
Supreme Court of British Columbia Supreme may refer to: Entertainment * Supreme (character), a comic book superhero * ''Supreme'' (film), a 2016 Telugu film * Supreme (producer), hip-hop record producer * "Supreme" (song), a 2000 song by Robbie Williams * The Supremes, Motown-e ...
in 1999, though in 2000 the
British Columbia Court of Appeal The British Columbia Court of Appeal (BCCA) is the highest appellate court in the province of British Columbia, Canada. It was established in 1910 following the 1907 Court of Appeal Act. The BCCA hears appeals from the Supreme Court of Britis ...
refused to overturn the lower court's ruling. An appeal at the
Supreme Court of Canada The Supreme Court of Canada (SCC; french: Cour suprême du Canada, CSC) is the Supreme court, highest court in the Court system of Canada, judicial system of Canada. It comprises List of Justices of the Supreme Court of Canada, nine justices, wh ...
is still pending. A special prosecutor was appointed but the investigation was halted for lack of evidence in 2003, three weeks before Vancouver and Whistler won the bid to host the
2010 Winter Olympics )'' , nations = 82 , athletes = 2,626 , events = 86 in 7 sports (15 disciplines) , opening = February 12, 2010 , closing = February 28, 2010 , opened_by = Governor General Michaëlle Jean , cauldron = Catriona Le May DoanNancy GreeneWayne Gretz ...
. In the meantime, a Nordic lodge was founded in the Callaghan Valley in 1998, just prior to the Canadian Olympic Committee's selection of Vancouver over Calgary and Quebec City as the site of the 2010 Olympics bid. The owner of the Nordic lodge was a promoter of using the Callaghan Valley for Olympic ski-jumping, cross-country, biathlon and other Nordic events. Powder Mountain promoters Nan and Dianne Hartwick continue to press for investigation of backroom dealing that led to the shunting-aside of their project and claim connections between members of VANOC, the
Vancouver Organizing Committee for the 2010 Olympic and Paralympic Winter Games The Vancouver Organizing Committee for the 2010 Olympic and Paralympic Winter Games (VANOC) (french: Comité d’organisation des Jeux olympiques et paralympiques d’hiver de 2010 à Vancouver - COVAN) was the non-profit organization responsible ...
, and those in the provincial administration who helped quash their project. The province has also issued permits for other operations in the valley, such as cat-skiing and snowmobile tour operations, as well as pushed through permits for construction of the
Whistler Olympic Park The Whistler Olympic Park is the location of the Nordic events facilities for the 2010 Winter Olympics and is located in the Madeley Creek basin in the Callaghan Valley, west of Whistler, British Columbia, Canada. The facility hosted the Biathlon ...
, which is the site of the games' Nordic events. The Hartwicks' position is that these developments violate the agreement-in-principle they had with the province, which the provincial government had claimed was without sufficient backing. In 2007, RCMP Commercial Crimes Unit head Kevin deBruyckere confirmed that a review is underway, and which the Hartwicks say is based on new evidence of conflict of interest. The Hartwicks emphasize that they are not anti-Olympics, but that their ultimate goal is only to re-establish their right to complete their resort proposal. ''RCMP reviewing Callaghan Valley dispute, again: Powder Mountain Resorts hopes investigation will uncover past conflicts of interest, revive ski resort plans'', ''Whistler Pique Magazine'', August 24, 2007
/ref>


See also

*
Volcanism in Canada Volcanism, Volcanic activity is a major part of the geology of Canada and is characterized by many types of volcanic landform, including lava flows, volcanic plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine volcano ...
*
Volcanism in Western Canada Volcanism of Western Canada has produced lava flows, lava plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, greenstone belts, submarine volcanoes, calderas, diatremes and maars, along with examples of more less common volcanic ...
*
Garibaldi Volcanic Belt The Garibaldi Volcanic Belt is a northwest–southeast trending volcanic chain in the Pacific Ranges of the Coast Mountains that extends from Watts Point in the south to the Ha-Iltzuk Icefield in the north. This chain of volcanoes is located in ...


References

Mountain ranges of British Columbia Glaciers of the Pacific Ranges Whistler, British Columbia Ice fields of British Columbia New Westminster Land District {{Pacific Ranges