the northern portion of the Garibaldi Volcanic Belt, is a complex of at least four overlapping stratovolcanoes made of dacite and rhyodacite that become progressively younger from south to north, ranging in age from two million to 2,490 years old. The central segment of the Garibaldi Volcanic Belt is defined by a group of eight volcanoes on a ridge of highland east of the Squamish River, and by remnants of basaltic lava flows preserved in the adjacent Squamish valley. Mount Cayley, the largest and most persistent volcano, is a deeply eroded stratovolcano comprising a lava dome complex made of dacite and minor rhyodacite ranging in age from 3.8 to 0.31 million years old. 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. The primary volcanoes in the southern segment are Mount Garibaldi, Mount Price, and The Black Tusk. The oldest volcano, The Black Tusk, is the remnants of an extinct andesitic stratovolcano that formed during two distant stages of volcanic activity, the first between 1.1 and 1.3 million years ago and the second between 0.17 and 0.21 million years ago. Mount Garibaldi, a fairly dissected stratovolcano north of Vancouver, was built by Peléan eruptions between 0.26 and 0.22 million years ago during the waning stages of the last glacial, or "Wisconsinian", period. Mount Price, a less significant stratovolcano just north of Mount Garibaldi, formed during three distinct periods of volcanic activity beginning at 1.2 million years ago and culminating with the eruption of Clinker Peak on its western flank 0.3 million years ago. In addition to the large, central andesite-dacite volcanoes, the southern portion of the Garibaldi Volcanic Belt includes remnants of basalt and basaltic andesite lava flows and pyroclastic rocks. These include valley -filling lava flows interbedded with till containing wood about 34,000 years old. The poorly studied Alert Bay Volcanic Belt extends from Brooks Peninsula on the northwestern coast of Vancouver Island to Port McNeill on the northeastern coast of Vancouver Island. It encompasses several separate remnants of late Neogene volcanic