Vulcan's Thumb

Vulcan's Thumb
Highest point
Elevation	2,290 m (7,510 ft)
Coordinates	50°07′N 123°17′W / 50.11°N 123.29°W / 50.11; -123.29
Geography
Location	British Columbia, Canada
Parent range	Pacific Ranges
Topo map	NTS 92J/03
Geology
Age of rock	Pleistocene
Mountain type	Stratovolcano
Volcanic arc/belt	Canadian Cascade Arc Garibaldi Volcanic Belt
Last eruption	Pleistocene
Climbing
First ascent	None

Vulcan's Thumb is a deeply dissected, unstable stratovolcano^[1] located directly on the southern ridge of Pyroclastic Peak. It is one of the five main volcanic peaks of the Mount Cayley massif and remains unclimbed because of technical difficulties and its loose rock. Vulcan's Thumb is believed to have last erupted during the Pleistocene period.^[1]

The creation of Vulcan's Thumb consist of vent breccia, massive lava flows, and agglutinated breccia of plagioclase, hypersthene, hornblende, biotite, phyric dacite deposited as part of an edifice that raised upon the southwestern edge of the ancestral Mount Cayley.

See also

• Cascade Volcanoes
• Garibaldi Volcanic Belt
• List of volcanoes in Canada
• Volcanism of Canada
• Volcanism of Western Canada
• Mount Cayley

References

Pacific Ranges
Ranges	Bendor Britannia Bunster Cadwallader Calliope Camelsfoot Cantilever Caren Chilcotin Colville Conical Douglas Earle Edwards Fannin Fitzsimmons Franklyn Fraser Garibaldi Gastineau Georgina Koeye Lewis Lillooet Namu Nicholl Niut North Shore Pantheon Pembroke Sir Harry Tantalus Tottenham Unwin Waddington Wharncliffe Whitemantle
Mountains	Akasik Alfred Alice Arthur Asperity Birkenhead Bishop The Black Tusk Blackcomb Blanshard Brandywine Breakenridge Brew Brew Burke Callaghan Capricorn Castle Towers Cauldron Cayley Cinder Cone Clarke Coquitlam Crevasse Crag Crickmer Crown Currie Cypress Devastator Dewdney Eagle Edge Elsay Fang Fee Fitzgerald Forefinger Frederick William Fromme Garibaldi Good Hope Grouse Helena Job Judge Howay Kinch Little Finger Little Ring Luna Mamquam Meager Merlon Middle Finger Monarch Monmouth Munday Nicomen One Eye Opal Cone Overill Pali Petlushkwohap Plinth Powder Price Pylon Pyroclastic Queen Bess Raleigh Red Tusk Ring Robie Reid Round Serratus Seymour Silverthrone Skihist Stein Somolenko Spearhead Table Tantalus Taseko Tatlow Tiedemann Tricouni Tuber Vic Victoria Vulcan's Thumb Waddington Wedge Wellington
Passes	Cayoosh Griswold McGillivray Pemberton Railroad Tyoax Wedge
Glaciers	Compton Névé Diamond Garibaldi Névé Ha-Iltzuk Homathko Klinaklini Mamquam Monarch Pashleth Powder Mountain Silverthrone Spearhead
Communities	List of communities in British Columbia
Parks	Clendinning Duffey Lake Garibaldi Mount Elphinstone Stein Valley Nlaka'pamux Heritage Spruce Lake (South Chilcotin) Upper Lillooet Golden Ears Tantalus Mehatl Creek Birkenhead Lake Joffre Lakes Ts'il?os Bishop River Princess Louisa Marine Callaghan Nairn Falls Brandywine Falls Alice Lake Blackcomb Glacier Tetrahedron Stawamus Chief Murrin Mount Seymour Cypress Indian Arm Pinecone-Burke Shannon Falls Rolley Lake Sasquatch Big Creek Homathko Estuary Davis Lake

Volcanoes of the Garibaldi Volcanic Belt
The Black Tusk Mount Brew Tuber Hill Salal Glacier volcanic complex Sham Hill Cauldron Dome Mount Cayley Pyroclastic Peak Vulcan's Thumb Cinder Cone Ember Ridge Mount Fee Franklin Glacier Volcano Mount Garibaldi Atwell Opal Glacier Pikes Little Ring Mountain Mount Meager Bridge River Vent Capricorn Mountain Devastator Peak Mount Job Perkin's Pillar Plinth Peak Pylon Peak Monmouth Creek complex The Castle Pali Dome Mount Price Clinker Peak Ring Mountain Round Mountain Silverthrone Caldera Mount Silverthrone Machmell River Cone Slag Hill The Table Tricouni Southwest Watts Point volcanic centre
See also Volcanism of Canada portal