Mount Silverthrone

Mount Silverthrone
Northeast face of Mount Silverthrone
Elevation	c. 2,865 m (9,400 ft)
Prominence	c. 975 m (3,200 ft)
Listing	List of volcanoes in Canada List of Cascade volcanoes
Location
Location	British Columbia, Canada
Range	Pacific Ranges
Coordinates	51°31′41.9″N 126°06′47.9″W / 51.528306°N 126.113306°W / 51.528306; -126.113306
Topo map	NTS 92M/09
Geology
Type	Lava dome
Age of rock	Holocene
Volcanic arc/belt	Cascade Volcanic Arc Pemberton/Garibaldi Volcanic Belt
Last eruption	Unknown; possibly younger than 1000
Climbing
First ascent	1936 Don Munday, Phyllis Munday, H. Hall, Hans Fuhrer

Mount Silverthrone, officially named Silverthrone Mountain, is a mountain in the Regional District of Mount Waddington, British Columbia, located over 320 km (200 mi) northwest of the city of Vancouver and about 50 km (30 mi) west of Mount Waddington, British Columbia, Canada. It is the highest peak in the Ha-Iltzuk Icefield, which is the largest icefield in the Coast Mountains south of the Alaska Panhandle.

Geology

Mount Silverthrone is an eroded lava dome on the northeast edge of a large caldera complex called the Silverthrone Caldera. It lies within the Coast Plutonic Complex, which is the single largest contiguous granite outcropping in the world. The plutonic and metamorphic rocks extend approximately 1,800 kilometers on the coast of British Columbia, southwestern Yukon and southeastern Alaska. In addition, Garibaldi, Meager, Cayley and Silverthrone areas are of recent volcanic origin. The volcanic terrain in the Silverthrone area is very similar to the Mount Meager volcanic complex further south. However, there is much more ice.

Mount Silverthrone is perhaps one the most heavily glaciated volcanic peaks in southwestern British Columbia. It has a topographic prominence of approximately 975 m (3,200 ft), 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 in far northwestern British Columbia.

Skiing and recreation

The first mountaineering visit at Mount Silverthrone was by the famous pioneering climbing group of Don and Phyllis Munday in 1936 by walking up the Klinaklini Glacier from the head of Knight Inlet. Because Silverthrone is heavily glaciated, Don Munday called the mountain "home of the snows".^[1]

Skiing on Mount Silverthrone includes skiing on the largest ice field in the southern Coast Mountains, the Ha-Iltzuk Icefield. It is skiable over 1,500 m (5,000 ft), possibly over 2,700 m (9,000 ft) down to the Pacific Ocean.^[2] 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 camps at Owikeno Lake to the west or at the start of Knight Inlet to the southwest, followed by long hiking and skiing methods.

See also

Volcanism of Canada portal

• Cascade Volcanoes
• Garibaldi Volcanic Belt
• Pemberton Volcanic Belt
• Cascade Range
• Ha-Iltzuk Icefield
• List of volcanoes in Canada
• Volcanism of Canada
• Volcanism of Western Canada

References

1. ^ Ha-Iltzuk Icefield in the Canadian Mountain Encyclopedia. Retrieved on 2007-11-13
2. ^ Skiing the Pacific Ring of Fire and Beyond: Silverthrone Mountain Retrieved on 2007-11-12

External links

• Volcanoes of Canada Garibaldi Volcanic Belt (Silverthrone area)
• Catalogue of Canadian volcanoes - Silverthrone Caldera
• Silverthrone Mountain in the Canadian Mountain Encyclopedia