Bridge River Cones

The Bridge River Cones volcanic field consists of a group of small basaltic and trachybasaltic eruptive centers at the extreme northern end of the Garibaldi volcanic belt in SW British Columbia. Pleistocene volcanic necks and cones were Potassium-Argon dated at 0.97 and 0.59 million years ago in the Salal Creek area and display ice-contact features (Lawrence et al., 1984). Tuber Hill is a small subaerial 600,000-year-old basaltic stratovolcano to the N that was constructed on the Bridge River upland when neighboring valleys were filled with ice. Lava flows that overlie poorly consolidated glacial till and appear to post-date the latest glaciation are found immediately N of Bridge River. The youngest flow may be less than 1500 years old (Souther; in Wood and Kienle, 1990).