 Mount Fee, a narrow volcanic plug made of rhyodacite about long and wide, rises above the highland ridge.Complete denudation of the central spine as well as the absence of till under lava flows from Mount Fee suggest a preglacial age.The other volcanoes of the central Garibaldi Belt, including Ember Ridge, Pali Dome, Cauldron Dome, Slag Hill, Mount Brew and Crucible Dome, were formed during subglacial eruptions to develop tuya-like forms with over-steepened, ice-contact margins.