Mount Silverthrone, officially named Silverthrone Mountain, is a

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher t ...

in the

Pacific Ranges The Pacific Ranges are the southernmost subdivision of the Coast Mountains portion of the Pacific Cordillera. Located entirely within British Columbia, British Columbia, Canada, they run northwest from the lower stretches of the Fraser River to B ...

of the

Coast Mountains The Coast Mountains () are a major mountain range in the Pacific Coast Ranges of western North America, extending from southwestern Yukon through the Alaska Panhandle and virtually all of the British Columbia Coast, Coast of British Columbia sout ...

British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...

, Canada, located over northwest of the city 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 cit ...

and about west of

Mount Waddington Mount Waddington, once known as Mystery Mountain, is the highest peak in the Coast Mountains of British Columbia, Canada. Although it is lower than Mount Fairweather and Mount Quincy Adams, which straddle the United States border between Alaska ...

, Canada. It is the highest peak in the

Ha-Iltzuk Icefield The Ha-Iltzuk Icefield is an icefield in the central Pacific Ranges of the Coast Mountains in British Columbia, Canada. It is the largest icefield in the Coast Mountains south of the Alaska Panhandle, with an area of . It is located on the west ...

, which is the largest icefield in the

south of the

Alaska Panhandle Southeast Alaska, often abbreviated to southeast or southeastern, and sometimes called the Alaska(n) panhandle, is the southeastern portion of the U.S. state of Alaska, bordered to the east and north by the northern half of the Canadian provi ...

Geology

Mount Silverthrone is an eroded

lava dome In volcanology, a lava dome is a circular, mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions ...

on the northeast edge of a large

caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the str ...

complex called the

Silverthrone Caldera The Silverthrone Caldera is a potentially active caldera complex in southwestern British Columbia, Canada, located over northwest of the city of Vancouver and about west of Mount Waddington in the Pacific Ranges of the Coast Mountains. The cal ...

. It lies within the

Coast Plutonic Complex The Coast Range Arc was a large volcanic arc system, extending from northern Washington through British Columbia and the Alaska Panhandle to southwestern Yukon. The Coast Range Arc lies along the western margin of the North American Plate in the ...

, which is the single largest contiguous

granite Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly coo ...

outcropping in the world. The

plutonic 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: Marc ...

and

metamorphic rock Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock ( protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, caus ...

s extend approximately 1,800 kilometers on the coast of British Columbia, southwestern

Yukon Yukon () is a Provinces and territories of Canada, territory of Canada, bordering British Columbia to the south, the Northwest Territories to the east, the Beaufort Sea to the north, and the U.S. state of Alaska to the west. It is Canada’s we ...

and southeastern

Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...

. In addition,

Garibaldi Giuseppe Maria Garibaldi ( , ;In his native Ligurian language, he is known as (). In his particular Niçard dialect of Ligurian, he was known as () or (). 4 July 1807 – 2 June 1882) was an Italian general, revolutionary and republican. H ...

, Meager, Cayley and Silverthrone areas are of recent volcanic origin. The volcanic terrain in the Silverthrone area is very similar to the

Mount Meager massif The Mount Meager massif is a group of volcanic peaks in the of the Coast Mountains in southwestern British Columbia, Canada. Part of the Cascade Volcanic Arc of western North America, it is located north of Vancouver at the northern end of the P ...

further south. However, there is much more ice. Mount Silverthrone is among the heavily glaciated peaks in southwestern British Columbia. It has a

topographic prominence In topography, prominence or relative height (also referred to as autonomous height, and shoulder drop in US English, and drop in British English) measures the height of a mountain or hill's summit relative to the lowest contour line encircling ...

of approximately , greater than any other volcano in southwestern British Columbia. The extensive icefields around Mount Silverthrone are receding and are small compared to their former extent, but they are an impressive indication of how much of British Columbia looked 10,000 years or more ago. Silverthrone contains one of the few calderas buried beneath the ice caps of western Canada, another example being

Mount Edziza Mount Edziza ( ; ) is a volcanic mountain in Cassiar Land District of northwestern British Columbia, Canada. It is located on the Big Raven Plateau of the Tahltan Highland which extends along the western side of the Stikine Plateau. Mount Ed ...

in far northwestern British Columbia.

Skiing and recreation

The first mountaineering visit at Mount Silverthrone was in 1936 by the famous pioneering climbing couple Don and

Phyllis Munday Phyllis Beatrice Munday (née James; 24 September 1894 – 11 April 1990) was a Canadian mountaineer, explorer, naturalist and humanitarian. She was famed for being the first woman to reach the summit of Mount Robson (with Annette Buck) in ...

, accompanied by Henry Hall, by walking up the

Klinaklini Glacier The Klinaklini Glacier is a glacier west of the Klinaklini River and head of Knight Inlet the Coast Land District of British Columbia, Canada Canada is a country in North America. Its Provinces and territories of Canada, ten province ...

from the head of

Knight Inlet Knight Inlet ( Kwakʼwala: ''Tsawatti'') is one of the principal inlets of the British Columbia Coast, and the largest of the major inlets in the southern part of the Coast. It is fifth in sequence of the great saltwater inlets north from the 4 ...

. Because Silverthrone is heavily glaciated,

Don Munday Walter Alfred Don Munday (1890–1950) was a Canadian explorer, naturalist and mountaineer famous for his explorations of the Coast Mountains with his wife Phyllis, and especially for the exploration of the Waddington Range. Early life Don Munday ...

called the mountain "home of the snows".

Skiing Skiing is the use of skis to glide on snow for basic transport, a recreational activity, or a competitive winter sport. Many types of competitive skiing events are recognized by the International Olympic Committee (IOC), and the International S ...

on Mount Silverthrone includes skiing on the largest ice field in the southern Coast Mountains, the Ha-Iltzuk Icefield. It is skiable over , possibly over down to the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

. The easiest access to Mount Silverthrone is by air travel, starting from the rural community of Tatla Lake, landing on the major part of the Ha-Iltzuk Icefield. Air travels can also be made into

logging Logging is the process of cutting, processing, and moving trees to a location for transport. It may include skidder, skidding, on-site processing, and loading of trees or trunk (botany), logs onto logging truck, trucksOwikeno Lake Owikeno Lake, also Owekeeno Lake, Owekano Lake, Oweekayno Lake and other spellings (pron. "o we KEE no"), is a large fjord lake in the Central Coast region of British Columbia, Canada. It connects to the head of Rivers Inlet by the short Wanno ...

to the west or at the start of

to the southwest, followed by long hiking and skiing methods.

References

External links

Volcanoes of Canada
Garibaldi Volcanic Belt (Silverthrone area)
Catalogue of Canadian volcanoes - Silverthrone Caldera
* {{DEFAULTSORT:Silverthrone Two-thousanders of British Columbia Volcanoes of British Columbia Subduction volcanoes Pleistocene lava domes Garibaldi Volcanic Belt Pacific Ranges Range 2 Coast Land District Lava domes of British Columbia

Geology

Skiing and recreation

See also

References

External links