Mount Meager, located north of Vancouver, is a peak of the Mount Meager massif. This is a group of coalescent stratovolcanoes and the largest volcanic centre in the Garibaldi Volcanic Belt. It comprises about of eruptive rocks that were deposited during four distinct eruptive periods, the first beginning 2.2 million years ago. During the present period (beginning 150,000 years ago), it has erupted more than five times, producing ash falls, pyroclastic flows, lava flows and lahars. The only identified Holocene eruption was in about 410 BC and created a diverse sequence of volcanic deposits well exposed along the Lillooet River. This is the most recent major explosive eruption in British Columbia, as well as the largest known Holocene explosive eruption in Canada.