Mountain type Subglacial mound Elevation 1,094 m Province British Columbia Age of rock Pleistocene | Last eruption 12,000 years ago Prominence 227 m Mountain range Shuswap Highland | |
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Location British Columbia, Canada Topo map NTS 92.P/16 or PS-WG3 (south half) Volcanic arc/belt Wells Gray-Clearwater volcanic field Easiest route Trail off Majerus Falls trail Similar White Horse Bluff, Wells Gray‑Clearwater volcanic fi, Kostal Cone, Mount Ray, Flourmill Volcanoes | ||
Pyramid Mountain is a subglacial mound located on the Murtle Plateau in Wells Gray Provincial Park, east-central British Columbia, Canada.
Contents
Map of Pyramid Mountain, Thompson-Nicola A, BC, Canada
FormationEdit
Pyramid Mountain erupted about 12,000 years ago. It was once mistaken for a cinder cone and is now known to have erupted underneath about 1,600 m (5,249 ft) of glacial ice. The volcano erupted vigorously and cooled rapidly when the hot lava contacted the surrounding ice and melted it, creating an envelope of water around the rising volcano. The result was a cement-like surface with smoothed cobbles of granite, schist, phyllite and other non-volcanic pebbles which were carried by the ice from many kilometers distant. As a result of this type of eruption, Pyramid Mountain has no crater and no lava flows stretching away from its base. The secondary cone to the east (best seen from Clearwater Valley Road near Hemp Creek) was not formed by a separate eruption, but was simply a slump when the ice melted away from Pyramid, releasing the pressure against its slopes.
AccessEdit
Pyramid Mountain can be viewed from Wells Gray Park roads at three locations:
The trail to the top of Pyramid Mountain starts at Pyramid Campground. It is 4 km (2.5 mi) to the summit. The view is mostly southward to Trophy Mountain, Battle Mountain and Dunn Peak. The Murtle River flows along the east and south sides of Pyramid. In some weather conditions, the plume of spray over Helmcken Falls can be seen to the west.