No latest activity reported for Spectrum Range.

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Hickson C J, Edwards B R, 2001. Volcanoes and Volcanic Hazards in Canada. {In}; Brooks G R (ed) {A Synthesis of Geological Hazards in Canada}, Geol Surv Can Bull, 548: 1-248

Hickson C J, Soos A, Wright R, 1994. Catalogue of Canadian volcanoes. {Geol Surv Canada Open-File Rpt}

Souther J G, 1973. Cordilleran volcanic project Spectrum Range. {Geol Surv Can Pap}, 73-1: 46-48

Souther J G, 1992. The late Cenozoic Mount Edziza volcanic complex, British Columbia. {Geol Surv Can Mem}, 420: 1-320

Souther J G, Lambert M B, 1972. Volcanic rocks of the northern Canadian Cordillera. {24th Internatl Geol Cong, Montreal, Guidebook}, Sec 2: 1-54

Wood C A, Kienle J (eds), 1990. {Volcanoes of North America}. Cambridge, England: Cambridge Univ Press, 354 p

The Spectrum Range, south of Mount Edziza, is one of four large composite volcanoes that make up the Mount Edziza-Spectrum Range volcanic complex. A predominately rhyolitic lava dome complex overlies a basal basaltic shield volcano in the Spectrum Range, named for its extensive colorful solfataric alteration. The Pliocene Spectrum Range center contains Pleistocene subglacial and subaerial cones on the SW flank and Holocene pyroclastic cones and lava flows on the NW and SW sides. The Mess Lake Lava Field on the NW consists of young lava flows and tephra from three pyroclastic cones, including The Ash Pit, which may be the youngest volcanic feature of the Mount Edziza-Spectrum Range complex.