Approximately how long has B.C.'s Mt.Garibaldi, in the Canadian part of the Cascades volcanoes, been dormant?

Name: Approximately how long has B.C.'s Mt.Garibaldi, in the Canadian part of the Cascades volcanoes, been dormant?
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Mt. Garibaldi in British Columbia is part of the Canadian Cascade Range and last erupted during the Pleistocene epoch, which ended approximately 11,700 years ago. Therefore, it has been dormant since the last ice age.

Approximately How Long Has B