Bennett Lake Volcanic Complex

Bennett Lake Volcanic Complex
Elevation	1500 m (4900 ft)
Location	British Columbia/Yukon, Canada
Range	Coast Mountains
Type	Caldera
Age of rock	50 million years
Last eruption	Eocene

The Bennett Lake Volcanic Complex (BLVC) is a huge 50 million year old extinct caldera complex that spans across the BC-Yukon border in Canada. In topography a summit is a point on a surface which is higher in Elevation than all points immediately adjacent to British Columbia (ˌbrɪtɨʃ kəˈlʌmbiə ( BC) ( (la Colombie-Britannique C Yukon (ˈjuːkɒn is the westernmost and smallest of Canada's three territories. Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page A mountain range is a chain of Mountains bordered by highlands or separated from other mountains by passes or valleys The Coast Mountains are a Mountain range of the Pacific Cordillera, running along the north western shore of the North American continent extending south Mountains can be characterized in several ways Some mountains are Volcanoes and can be characterized by the type of lava and eruptive history A caldera is a cauldron-like volcanic feature formed by the collapse of land following a volcanic eruption The geologic time scale is a chronologic schema (or idealized Model) relating Stratigraphy to time that is used by Geologists and other Plate tectonics and hotspots Divergent plate boundaries At the The Eocene epoch (558 ± 02 - 339 ± 01 Ma) is a major division of the Geologic timescale and the second epoch of the Palaeogene period in A caldera is a cauldron-like volcanic feature formed by the collapse of land following a volcanic eruption British Columbia (ˌbrɪtɨʃ kəˈlʌmbiə ( BC) ( (la Colombie-Britannique C Yukon (ˈjuːkɒn is the westernmost and smallest of Canada's three territories. Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page The caldera complex is surrounded by granitic rocks containing pendants. Granite (ˈɡrænɪt is a common and widely occurring type of intrusive, Felsic, igneous rock. In Geology, rock is a naturally occurring aggregate of Minerals and/or Mineraloids The Earth's outer solid layer the ‘ Lithosphere It is located near the eastern contact of the Coast Plutonic Complex and the Whitehorse Trough. There are thick series of pyroclastic and epiclastic rocks at the caldera. Pyroclastic rocks or pyroclastics (derived from the Greek πῦρ, meaning fire and κλαστός, meaning broken are Clastic rocks Remnants of this huge caldera complex are preserved near Lake Bennett in the Coast Mountains. The Coast Mountains are a Mountain range of the Pacific Cordillera, running along the north western shore of the North American continent extending south The complex compose the Skukum Group. The Skukum Group is a 55 million year old group of discreet Calderas in British Columbia and the Yukon Territory, Canada.

The Bennett Lake Volcanic Complex was formed when the ancient Kula Plate was subducting under North America during the early Eocene period. The Kula Plate was an oceanic Tectonic plate under the northern Pacific Ocean south of the Near Islands segment of the Aleutian Islands. In Geology, a subduction zone is an area on Earth where two tectonic plates meet and move towards one another with one sliding underneath the other The Eocene epoch (558 ± 02 - 339 ± 01 Ma) is a major division of the Geologic timescale and the second epoch of the Palaeogene period in ^[1]

Eruptive history

Cataclysmic eruptions from the Bennett Lake Volcanic Complex were from vents along arcuate fracture systems that spewed out about 850 km³ (200 cu mi) of glowing avalanches. This article refers to the natural event For other uses see Avalanche (disambiguation An avalanche is an abrupt and rapid flow of snow often Evacuation of the underlying magma chamber was followed by several stages of collapse to form two calderas, one nested inside the other, that produced an elliptical depression 19 km (12 mi) by 30 km (19 mi) across. A magma chamber is a large underground pool of molten rock lying under the surface of the earth's crust ^[1] The calderas were from 200 m (650 ft) to 2700 m (8800 ft) deep. Volcanism continued for some time after the caldera collapse. High level andesite and rhyolite dykes and intrusive bodies crosscut volcanic flows and tuffs at all levels dyke swarms are emplaced along ring fractures and fault zones at the southwest edge of the caldera. For the extinct cephalopod genus see Andesites. Andesite (ˈændəsaɪt is an igneous, Volcanic rock, of intermediate This page is about a volcanic rock For the ghost town see Rhyolite Nevada, and for the satellite system see Rhyolite/Aquacade. A dike or dyke in Geology is a type of Sheet intrusion referring to any geologic body that cuts Discordantly ' across planar Tuff (from the Italian "tufo" is a type of rock consisting of consolidated volcanic ash ejected from vents during a volcanic eruption In Geology a fault, or fault line, is a planar rock fracture which shows evidence of relative movement Near the dying stages of the volcano, magma surged upward and arched the roof of the magma chamber into a broad dome with relief of about 1500 m (4900 ft). Plate tectonics and hotspots Divergent plate boundaries At the Magma (Plurals magmas and magmata) is molten rock that sometimes forms beneath the surface of the Earth (or any other Terrestrial planet

References

^ ^a ^b Crustal recycling during subduction at the Eocene Cordilleran margin of North America Retrieved on 2007-06-26

See also List of volcanoes Western Canada is commonly thought to occupy a gap in the Pacific Ring of Fire, although that is not actually true Canada has examples of almost every type of Volcano found on Earth, including Stratovolcanoes Calderas Cinder cones Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century. Events 363 - Roman Emperor Julian is killed during the retreat from the Sassanid Empire.

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