Volcanic History
At least 54 eruptions have occurred at Mount Meager in the past 2,600,000 years, ranging in character from effusive to explosive. Four primary eruptive periods in the history of Mount Meager have been identified, with individual eruptions separated by thousands of years. Large northwest-southeast trending structures paralleling Harrison Lake and the Pemberton Valley may control volcanic activity at Mount Meager or at least create zones of crustal weakness that are exploited by rising magma batches.
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