The Alert Bay Volcanic Belt is a heavily eroded Neogene volcanic belt in northern Vancouver Island, British Columbia, Canada. The belt is now north of the Nootka Fault, but may have been directly above the fault at the time it last erupted. Eruptions of basaltictorhyolitic volcanoes and hypabyssal rocks of the Alert Bay Volcanic Belt are probably linked with the subducted margin flanked by the Explorer and Juan de Fuca plates at the Cascadia subduction zone. The Alert Bay Volcanic Belt is poorly studied, but appears to have been active in MiocenetoPliocene time. No Holocene eruptions are known, and volcanic activity in the belt has most likely ceased.
The features within the belt include:
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