Its most recent eruptions occurred at the Opal Cone on the SE flank ca. The volcano was partially constructed over the Cordilleran ice sheet and contains many ice-contact features. Mt Garibaldi volcano at the head of Howe Sound, 66 km north of Vancouver in SW British Columbia is probably Canada's best-known volcano and part of the active Cascades Range. 8000 years ago and produced the Ring Creek lava flow. Mount Garibaldi is an eroded, dacitic strato volcano in southwestern British Columbia.Both Garibaldi and Mount Baker to its south are part of the Cascade volcanic arc. It is a young stratovolcano capped by a complex of lava domes. Mount Garibaldi is an eroded, dacitic strato volcano in southwestern British Columbia.Both Garibaldi and Mount Baker to its south are part of the Cascade volcanic arc. Mount Garibaldi, rising above Garibaldi Lake to the north, is a largely Pleistocene stratovolcano with a summit lava dome complex.