 The Salal Glacier volcanic complex (), with a potassium-argon date of 0.97 to 0.59 million years, contains subaerial tephra and thin scoriaceous flows in the upper part of the pile are surrounded by ice-ponded flows up to thick.Tuber Hill (), a small basaltic stratovolcano with a potassium-argon date of 0.6 million years, was constructed on the Bridge River upland when neighboring valleys were filled by ice.Where distal flows violated on the glaciers a marginal meltwater lake was created in which less than of interbedded hyaloclastite, debris flows, and lacustrine tuff were deposited.