Dating services northern british columbia

Although the country's volcanic activity dates back to the Precambrian eon, volcanism continues to occur in Western and Northern Canada where it forms part of an encircling chain of volcanoes and frequent earthquakes around the Pacific Ocean called the Pacific Ring of Fire.

But because volcanoes in Western and Northern Canada are in remote rugged areas and the level of volcanic activity is less frequent than with other volcanoes around the Pacific Ocean, Canada is commonly thought to occupy a gap in the Pacific Ring of Fire between the volcanoes of western United States to the south and the Aleutian volcanoes of Alaska to the north.

In some cases, a basaltic shield volcano may have periods of explosive activity to form a stratovolcano mounted on top of the shield volcano.In Canada, cinder cones form when lava fountains release fragments of lava that harden in the air and fall around a linear volcanic vent.The rock fragments, often known as cinder or scoria, are glassy and contain gas bubbles "frozen" into place as magma exploded into the air and then cooled quickly.Volcanic activity has been responsible for many of Canada's geological and geographical features and mineralization, including the nucleus of North America called the Canadian Shield.Volcanism has led to the formation of hundreds of volcanic areas and extensive lava formations across Canada, indicating volcanism played a major role in shaping its surface.

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