Spectrum Range VulkanSpectrum Range, south of Mount Edziza, in NW British Columbia, is one of four large composite volcanoes that make up the Mount Edziza-Spectrum Range volcanic complex.
Similar to the other 3 central volcanoes, Spectrum Range stratovolcano is formed predominately by rhyolitic lava domes and overlies a basal basaltic shield volcano. The volcano contains both subglacial and subaerial lava domes, pyroclastic cones and lava flows.
The Mess Lake Lava Field on the NW flank consists of young lava flows and tephra from 3 cinder cones, including The Ash Pit, probably the youngest volcanic feature of Spectrum Range.
The Spectrum Range has its name for its extensive colorful solfataric alteration.