How many kilometers do the largest volcanoes in Canada measure?

Mr. Bean of England

Hi Mr. Bean of England,

Do you mean how high? How wide? How far around? I've looked in "Volcanoes of North America" by Charles Wood and Jurgen Keinle, and it's hard to decide which is the larges. For some of the volcanoes they list the height, for others they list the elevation of the summit (but if you don't know the elevation of the base you can't tell the height), and others list the diameter or the area covered. Some candidates for the largest are Mt. Garibaldi, which is ~700 m high, and has dimensions of 3 x 5 km. The Chilcotin basalt covers ~25,000 square km, and has a volume of ~1800 cubic km (that's pretty good size, but it is a bunch of flat-lying basalt lava flows, not a very impressive-looking volcano). The Itcha Range is an old eroded shield volcano that is 690 m high and has a diameter of 15 km. The Ilgachuz range is another old eroded shield volcano and it has a diameter of 25 km. Finally, Edziza is pretty big, with a 1000 square km area, and consisting of a complex of multiple volcanic centers.

I realize this is not a direct answer to your question, but perhaps you'll have to go borrow the book at your nearest library and try to pull out the information that you need.

Sincerely,

Scott Rowland

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