Volcanism as early as 14.5 million years ago has been linked to the Anahim hotspot, with the latest eruption having taken place in the last 8,000 years. This volcanic activity has produced rocks that show a bimodal distribution in composition.
Volcanic activity occurring as far back as 14.5 million years is connected to the Anahim hotspot, with the most recent eruption being within the last 8,000 years. This volcanic action has produced rocks showing a bimodal distribution in their chemical composition.