Spectrum Range

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Spectrum Range
Range
Nahta Cone of the Spectrum Range
Country	Canada
Province	British Columbia

Part of	Tahltan Highland

Highest point	Yeda Peak
- elevation	2,430 m (7,972 ft)
- coordinates	57°26′0″N 130°41′0″W / 57.43333, -130.68333

Geology	Shield volcano
Orogeny	Volcanism
Period	Pliocene

The Spectrum Range, formerly called the Spectrum Mountains and the Rainbow Mountains, is a subrange of the Tahltan Highland and Boundary Ranges in the Stikine Country of northwestern British Columbia, 20 km west of the Stewart-Cassiar Highway, south of Mount Edziza and north of the Arctic Lake Plateau. The Spectrum Range falls within Mount Edziza Provincial Park. The range is lightly glaciated, as compared to the other ranges to the west. It lies on the Spatsizi Plateau.

1 Geology
2 Volcanoes
3 See also
4 References
5 External links

[edit] Geology

Like the Rainbow and Itcha-Ilgachuz Ranges at the western end of the Chilcotin Plateau farther south, the range's name derives from the brilliant colours that are symptomatic from from heavy mineralization comprising the material forming the range.

The Spectrum Range is one of four large stratovolcanoes that make the Mount Edziza-Spectrum Range complex. A predominantly lava dome overlies a basal shield volcano. The range is Pliocene in age and on its southwestern flank contains Pleistocene subglacial and subaerial cones and its northwest and southwest sides contain Holocene pyroclastic cones and lava flows. The youngest feature in the volcanic complex could be The Ash Pit.