Why are volcanoes near the coast?
This is because the Earth's crust is divided into a series of plates known as tectonic plates. Although most of the active volcanoes we see on land occur where plates collide, the largest number of Earth's volcanoes are hidden, occurring on the ocean floor along broad ridges.
Where do volcanoes occur in Canada?
Canada has five potentially active volcanic areas, all of which are located in British Columbia and the Yukon Territory: the Garibaldi Volcanic Belt in southwestern British Columbia (the northern extension of the American Cascade Arc) the Wells Gray-Clearwater Volcanic Field in east-central British Columbia.
Why are there no active volcanoes in the eastern parts of the United States and Canada?
No. Through plate tectonics, the eastern United States has been isolated from the global tectonic features (tectonic plate boundaries and mantle hot spots) that cause volcanic activity. So new volcanic activity is not possible now or in the near future.
Why do volcanoes occur in British Columbia?
Located on the legendary Pacific Ring of Fire, British Columbia sits at the convergence of the Cascadia subduction zone. Most of the volcanoes in British Columbia last erupted at the end of the Pleistocene epoch about 10,000 years ago, with the most recent eruption occurring 250 years ago.
Where are most volcanoes formed?
The Ring of Fire, also called the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. The majority of the earth's volcanoes and earthquakes occur along the Ring of Fire.
Has Canada ever had a volcano?
The eruption is believed to be Canada's deadliest geological disaster. More recently, only about 150 years ago, Lava Fork Volcano—also in the NCVP—produced Canada's most recent documented volcanic eruption.
BC is part of the North American portion of what is called the Pacific's "Ring of Fire," a 40,000-kilometer horseshoe of ocean trenches and volcanoes where 90 percent of the world's earthquakes occur.
The term megacaldera is sometimes used for caldera supervolcanoes, such as the Blake River Megacaldera Complex in the Abitibi greenstone belt of Ontario and Quebec, Canada. Eruptions that rate VEI 8 are called "supereruptions".
Where are the most volcanoes in Canada?
Volcanoes in Canada and the United States (Mainland) Most volcanoes in Canada and the United States are located along the west coast and related to the subduction of the Pacific plate beneath the continental North American tectonic plate. The USGS in particular does a great job of monitoring, studying and publishing a great deal of information about them.
Why are there no volcanoes in British Columbia?
One reason for this is that the northern part of the Juan de Fuca plate (ie the Explorer plate) is either not subducting or is subducting at a slower rate than the rest of the plate.
How does volcanism affect Canada's geology?
Volcanic activity is responsible for many of Canada's geological and geographic features and mineralization, including the core of the North American continent, known as the Canadian Shield. Volcanism has led to the formation of hundreds of volcanic areas and extensive lava formations across Canada.
How are volcanoes in Canada related to crustal rifting?
The Cascade Arc (aka the Garibaldi Volcanic Belt in Canada) is related to subduction of the Juan de Fuca Plate beneath the North America Plate. The Anahim Volcanic Belt is thought to be related to a mantle plume. The Stikine Volcanic Belt and the Wells Gray-Clearwater Volcanic Field are believed to be related to crustal rifting.
Full documentary here https://www.youtube.com/watch?v=tagg8Hxion0