 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 piles and related intrusions ranging in composition from basalt to rhyolite and in age from about eight million years old in the west to about 3.5 million years old elsewhere.Major element analyses of Alert Bay volcanic and hypabyssal rocks suggest two different basalt-andesite-dacite-rhyolite suites with divergent fractionation trends.