Vulcan's Thumb
The Vulcan's Thumb is a rock pinnacle in the Pacific Ranges of southwestern British Columbia, Canada.
It is the largest of a number of slender pinnacles protruding from the sharp summit ridge of Pyroclastic Peak, which forms part of the Mount Cayley massif.
Three eruptive stages built the Mount Cayley massif, the second of which is named after the Vulcan's Thumb.
Mohnhøgda
Mohnhøgda is a mountain on Svenskøya in Kong Karls Land, Svalbard.
It has a height of 285 m.a.s.l., and is located at the northern part of the island, separated from Dunérfjellet by the mountain pass Vindsalen.
The mountain is named after Norwegian meteorologist and astronomer Henrik Mohn.
Cauldron Dome
Cauldron Dome is a tuya in the Mount Cayley volcanic field, British Columbia, Canada.
Cauldron Dome is made of coarsely plagioclase-orthophyroxene-phyric andesite lava flows and last erupted during the Holocene.
It is in the Garibaldi Volcanic Belt, a portion of the Canadian Cascade Arc.
Pali Dome
Pali Dome is a subglacial volcano in the Pacific Ranges of the Coast Mountains in southwestern British Columbia, Canada.
It is part of the Mount Cayley volcanic field and its elevation is.
For the past 2 million years, the Mount Cayley volcanic field has had interactions between ice and lava which have created some unique landforms and an in- ice drainage system.
" Pali" comes from the Hawaiian word that means cliff or steep hill, while dome refers to the lava dome, which is when doughy lava flows from a volcanic vent which is usually rounded and flat on top.
One of the last known eruptions of the Pali Dome was over 10,000 years ago.
Mount Shisuniwa
Shisuniwa literally means ‘ the rock of four “ sun ”(= 13 cm) ’.
The other names of this mountain are, Mount Yonsun( Yonsuniwa- san) and Mount Moriya( Moriya- dake).
Little Ring Mountain
Little Ring Mountain, also called Little Ring Peak, is a tuya in the Pacific Ranges of the Coast Mountains in southwestern British Columbia, Canada.
It lies at the head of the Squamish and Soo Rivers.
Part of the Mount Cayley volcanic field, its most recent eruption most likely occurred during the Fraser Glaciation.
This peak is so- called because it is similar to the larger and officially named Ring Mountain just to the south.
Pyroclastic Peak
Pyroclastic Peak is the second highest of the five named volcanic peaks immediately south of Mount Cayley in British Columbia, Canada.
It is steep and rotten and is located southwest of Callaghan Lake and west of Whistler.
It is part of the Pacific Ring of Fire that includes over 160 active volcanoes.
On the south ridge of Pyroclastic Peak is a feature known as The Vulcan's Thumb which remains unclimbed because of the looseness of the rock.
Mount Cayley massif
The Mount Cayley massif is a group of mountains in the Pacific Ranges of southwestern British Columbia, Canada.
Located north of Squamish and west of Whistler, the massif resides on the edge of the Powder Mountain Icefield.
It consists of an eroded but potentially active stratovolcano that towers over the Cheakamus and Squamish river valleys.
All major summits have elevations greater than, Mount Cayley being the highest at.
The surrounding area has been inhabited by indigenous peoples for more than 7,000 years while geothermal exploration has taken place there for the last four decades.
Part of the Garibaldi Volcanic Belt, the Mount Cayley massif was formed by subduction zone volcanism along the western margin of North America.
Eruptive activity began about 4,000,000 years ago and has since undergone three stages of growth, the first two of which built most of the massif.
The latest eruptive period occurred sometime in the last 400,000 years with lesser activity continuing into the present day.
Future eruptions are likely to threaten neighbouring communities with pyroclastic flows, lahars( volcanically induced mudslides, landslides and debris flows) and floods.
To monitor this threat, the volcano and its surroundings are monitored by the Geological Survey of Canada( GSC).
Eruption impact would be largely a result of the concentration of vulnerable infrastructure in nearby valleys.
Mount Cayley volcanic field
The Mount Cayley volcanic field 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 of the Cascade Volcanic Arc, which extends from Northern California to southwestern British Columbia.
Most of the Cayley volcanoes were formed during periods of volcanism under sheets of glacial ice throughout the last glacial period.
These subglacial eruptions formed steep, flat- topped volcanoes and subglacial lava domes, most of which have been entirely exposed by deglaciation.
However, at least two volcanoes predate the last glacial period and both are highly eroded.
The field gets its name from Mount Cayley, the largest and most persistent volcano, located at the southern end of the Powder Mountain Icefield.
This icefield covers much of the central portion of the volcanic field and is one of the several glacial fields in the Pacific Ranges of the Coast Mountains.
Eruptions along the length of the field began between 1.6 and 5.3 million years ago.
At least 23 eruptions have occurred throughout its eruptive history.
This volcanic activity ranged from effusive to explosive, with magma compositions ranging from basaltic to rhyolitic.
Because the Mount Cayley volcanic field has a high elevation and consists of a cluster of mostly high altitude, non-overlapping volcanoes, subglacial activity is likely to have occurred under less than of glacial ice.
The style of this glaciation promoted meltwater escape during eruptions.
The steep profile of the volcanic field and its subglacial landforms support this hypothesis.
As a result, volcanic features in the field that interacted with glacial ice lack rocks that display evidence of abundant water during eruption, such as hyaloclastite and pillow lava.
Of the entire volcanic field, the southern portion has the most known volcanoes.
Here, at least 11 of them are situated on top of a long narrow mountain ridge and in adjacent river valleys.
The central portion contains at least five volcanoes situated at the Powder Mountain Icefield.
To the north, two volcanoes form a sparse area of volcanism.
Many of these volcanoes were formed between 0.01 and 1.6 million years ago, some of which show evidence of volcanic activity in the last 10,000 years.
Mount Cayley
Mount Cayley is a mountain and highest point of the Mount Cayley massif between the Cheakamus and Squamish rivers in British Columbia, Canada.
It has an elevation of.

Question: Are Mount Cayley and Mohnhøgda located in the same country?
Answer: no