Coquihalla Mountain
Encyclopedia
Coquihalla Mountain is an extinct stratovolcano
in Similkameen Country
, southwestern British Columbia
, Canada
, located 10 km (6.2 mi) south of Falls Lake and 22 km (13.7 mi) west of Tulameen
between the Coquihalla
and Tulameen
rivers. With a topographic prominence
of 816 m (2,677.2 ft), it towers above adjacent mountain ridges. It is the highest mountain in the Bedded Range
of the northern Canadian Cascades with an elevation of 2157 m (7,076.8 ft) and lies near the physiographic boundaries with the Coast Mountains
on the west and the Interior Plateau
on the east.
age Pemberton Volcanic Belt
that was erupting about 21 to 22 million years ago. Like the Pemberton Volcanic Belt, Coquihalla Mountain formed as result of Cascadia
subduction
.
Stratovolcano
A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...
in Similkameen Country
Similkameen Country
The Similkameen Country, also referred to as the Similkameen Valley or Similkameen District, but generally referred to simply as The Similkameen or more archaically, Similkameen, is a region roughly coinciding with the basin of the river of the same name in the Southern Interior of British Columbia...
, southwestern British Columbia
British Columbia
British Columbia is the westernmost of Canada's provinces and is known for its natural beauty, as reflected in its Latin motto, Splendor sine occasu . Its name was chosen by Queen Victoria in 1858...
, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
, located 10 km (6.2 mi) south of Falls Lake and 22 km (13.7 mi) west of Tulameen
Tulameen, British Columbia
Tulameen, originally known as Otter Flat, is a small community in British Columbia, Canada, about 26 kilometres northwest of the town of Princeton on the Crowsnest Highway , and about 185 kilometres east-northeast from the city of Vancouver, British Columbia...
between the Coquihalla
Coquihalla River
The Coquihalla River is located in the Cascade Mountains near the town of Hope, British Columbia. It originates in the Coquihalla Lakes and empties into the Fraser River at Hope....
and Tulameen
Tulameen River
The Tulameen River is a tributary of the Similkameen River in the Canadian province of British Columbia. The Tulameen River is part of the Columbia River drainage basin, being a tributary of the Similkameen River, which flows into the Okanagan River, which flows into the Columbia River.-Course:The...
rivers. With a topographic prominence
Topographic prominence
In topography, prominence, also known as autonomous height, relative height, shoulder drop , or prime factor , categorizes the height of the mountain's or hill's summit by the elevation between it and the lowest contour line encircling it and no higher summit...
of 816 m (2,677.2 ft), it towers above adjacent mountain ridges. It is the highest mountain in the Bedded Range
Bedded Range
The Bedded Range is a mountain range in the Hozameen Range subdivision of the Canadian Cascades, which are the extension of the Cascade Range into British Columbia, Canada. Located between the Coquihalla and Tulameen Rivers, the Bedded Range is a dioritic plug related to the Chilliwack...
of the northern Canadian Cascades with an elevation of 2157 m (7,076.8 ft) and lies near the physiographic boundaries with the Coast Mountains
Coast Mountains
The Coast Mountains 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. They are so-named because of their proximity to the sea coast, and are often...
on the west and the Interior Plateau
Interior Plateau
The Interior Plateau comprises a large region of central British Columbia, and lies between the Cariboo and Monashee Mountains on the east, and the Hazelton Mountains, Coast Mountains and Cascade Range on the west. The continuation of the plateau into the United States is known there as the...
on the east.
Geology
Coquihalla Mountain is a major preserved feature in the MioceneMiocene
The Miocene is a geological epoch of the Neogene Period and extends from about . The Miocene was named by Sir Charles Lyell. Its name comes from the Greek words and and means "less recent" because it has 18% fewer modern sea invertebrates than the Pliocene. The Miocene follows the Oligocene...
age Pemberton Volcanic Belt
Pemberton Volcanic Belt
The Pemberton Volcanic Belt is an eroded Oligocene volcanic belt at a low angle near Mount Meager, British Columbia, Canada. The Garibaldi and Pemberton volcanic belts appear to merge into a single belt, although the Pemberton is older than the Garibaldi Volcanic Belt...
that was erupting about 21 to 22 million years ago. Like the Pemberton Volcanic Belt, Coquihalla Mountain formed as result of Cascadia
Cascadia
Cascadia, a term that derives from the Cascade Range, may refer to:* the Pacific Northwest* Cascadia, a former plant genus now included in Saxifraga* 1700 Cascadia earthquake...
subduction
Subduction
In geology, subduction is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate, sinking into the Earth's mantle, as the plates converge. These 3D regions of mantle downwellings are known as "Subduction Zones"...
.
See also
- Jim Kelly PeakJim Kelly PeakJim Kelly Peak, also called Jim Kelly Mountain and Mount Jim Kelly, is the unofficial name for a mountain in southwestern British Columbia, Canada, located south of Falls Lake and west of Tulameen. It lies in the Bedded Range of the northern Canadian Cascades and is only away from the eastern...
- Volcanism of Canada
- Volcanism of Western CanadaVolcanism of Western CanadaVolcanism of Western Canada produces lava flows, lava plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine volcanoes, calderas, diatremes and maars, along with examples of more less common volcanic forms such as tuyas and subglacial mounds.-Volcanic belts:*Anahim...
- List of volcanoes in Canada
- Garibaldi Volcanic BeltGaribaldi Volcanic BeltThe Garibaldi Volcanic Belt, also called the Canadian Cascade Arc, is a northwest-southeast trending volcanic chain in the Pacific Ranges of the Coast Mountains that extends from Watts Point in the south to the Ha-Iltzuk Icefield in the north. This chain of volcanoes is located in southwestern...