Black Dome Mountain is the northernmost summit of the

Camelsfoot Range The Camelsfoot Range is a sub-range of the Chilcotin Ranges subdivision of the Pacific Ranges of the Coast Mountains in British Columbia. The Fraser River forms its eastern boundary. The range is approximately 90 km at its maximum length and ...

, which lies along the west side of the

Fraser River The Fraser River is the longest river within British Columbia, Canada, rising at Fraser Pass near Blackrock Mountain in the Rocky Mountains and flowing for , into the Strait of Georgia just south of the City of Vancouver. The river's annual d ...

, north of

Lillooet, British Columbia Lillooet () is a district municipality in the Squamish-Lillooet Regional District, Squamish-Lillooet region of southwestern British Columbia. The town is on the west shore of the Fraser River immediately north of the Seton River mouth. On British ...

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

. It is an ancient

butte __NOTOC__ In geomorphology, a butte () is an isolated hill with steep, often vertical sides and a small, relatively flat top; buttes are smaller landforms than mesas, plateaus, and tablelands. The word ''butte'' comes from a French word mea ...

-like volcano located in the formation known as the Chilcotin Group, which lie between the

Pacific Ranges , photo = Mount Garibaldi (50997016501).jpg , photo_size = 280px , photo_caption = Mount Garibaldi massif as seen from Squamish , map = , map_image = South BC-NW USA-relief PacificRanges.png , m ...

of the

Coast Mountains The Coast Mountains (french: La chaîne Côtière) 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 Coast of British Columbia ...

and the mid-

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

Location and terrain

Black Dome is located in the angle of

Churn Creek Churn Creek is a tributary of the Fraser River in the Canadian province of British Columbia. Course Churn Creek flows generally north before turning northeast on its final leg through grasslands, joining the Fraser River just south of the headquar ...

and the

Fraser Canyon The Fraser Canyon is a major landform of the Fraser River where it descends rapidly through narrow rock gorges in the Coast Mountains en route from the Interior Plateau of British Columbia to the Fraser Valley. Colloquially, the term "Fraser Ca ...

, southwest of

Dog Creek Bridge The dog (''Canis familiaris'' or ''Canis lupus familiaris'') is a domesticated descendant of the wolf. Also called the domestic dog, it is derived from the extinct Pleistocene wolf, and the modern wolf is the dog's nearest living relative. Do ...

Gang Ranch A gang is a group or society of associates, friends or members of a family with a defined leadership and internal organization that identifies with or claims control over territory in a community and engages, either individually or collectivel ...

. It is the northernmost summit of the

, which lines the west bank of the Fraser north of

Lillooet Lillooet () is a district municipality in the Squamish-Lillooet region of southwestern British Columbia. The town is on the west shore of the Fraser River immediately north of the Seton River mouth. On BC Highway 99, the locality is by road abou ...

. The

Churn Creek Protected Area The Churn Creek Protected Area is a provincial protected area in British Columbia, Canada. It is a mix of dryland canyon and steppe and adjoining rangeland flanking the canyon of Churn Creek and that stream's confluence with the Fraser River at ...

adjoins the north and western flanks of the mountain, while the

runs southward along its eastern flank.

Geology

Like other volcanic landforms in British Columbia, Black Dome Mountain is part of the

Pacific Ring of Fire The Ring of Fire (also known as the Pacific Ring of Fire, the Rim of Fire, the Girdle of Fire or the Circum-Pacific belt) is a region around much of the rim of the Pacific Ocean where many Types of volcanic eruptions, volcanic eruptions and ...

which includes over 160 active volcanoes. There are

obsidian Obsidian () is a naturally occurring volcanic glass formed when lava extrusive rock, extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements s ...

deposits and other deposits around the volcano. It has produced

olivine The mineral olivine () is a magnesium iron silicate with the chemical formula . It is a type of nesosilicate or orthosilicate. The primary component of the Earth's upper mantle, it is a common mineral in Earth's subsurface, but weathers quickl ...

basalt Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial ...

dykes,

lava Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or un ...

s, and

agglomerate Agglomerate (from the Latin ''agglomerare'' meaning "to form into a ball") is a coarse accumulation of large blocks of volcanic material that contains at least 75% bombs. Volcanic bombs differ from volcanic blocks in that their shape records flui ...

. Black Dome Mountain is thought to have formed as a result of extension of the crust behind the

Cascadia subduction zone The Cascadia subduction zone is a convergent plate boundary that stretches from northern Vancouver Island in Canada to Northern California in the United States. It is a very long, sloping subduction zone where the Explorer, Juan de Fuca, and ...

and last erupted during the

Pliocene The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58gold Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile met ...

mining prospects by Bralorne Mines Inc. and produced a bit of an excitement for people that lived near the mountain.

References

External links

*{{cite bivouac, id=6825, title=Black Dome Mountain
Black Dome Mountain Volcanic HistoryBubble Hot SpringBC Govt MINFILE Mineral Inventory
Volcanoes of British Columbia Two-thousanders of British Columbia Landforms of the Chilcotin Fraser Canyon Eocene volcanoes Pliocene volcanoes Polygenetic volcanoes Yale Division Yale Land District

Location and terrain

Geology

See also

References

External links