Spectrum Range

Spectrum Range
File:Spectrum Range satellite.jpg Satellite photo of the Spectrum Range
Highest point
Peak	Yeda Peak
Elevation
Coordinates
Geography
Spectrum Range
Country	Canada
Province	British Columbia
Parent range	Tahltan Highland (southwestern Stikine Plateau)
Geology
Orogeny	Volcanism
Age of rock	Pliocene-to-Holocene
Type of rock	Shield volcano

The Spectrum Range, formerly called the Spectrum Mountains and the Rainbow Mountains, is a subrange of the Tahltan Highland 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.

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 heavy mineralization comprising the material forming the range.

The Spectrum Range is one of four large stratovolcanoes that make up the Mount Edziza volcanic 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.

Volcanoes

The volcanoes that make up the Spectrum Range include:

• Nahta Cone
• The Ash Pit
• Mess Lake
• Outcast Hill
• Thaw Hill
• Source Hill
• Tadekho Hill
• Wetalth Ridge
• Exile Hill
• Spectrum Dome
• Little Iskut
• Yeda Peak

See also

• List of volcanoes in Canada
• List of Northern Cordilleran volcanoes
• List of mountain ranges
• Volcanism of Canada
• Volcanism of Western Canada
• Rainbow Range (Chilcotin Plateau) (aka Rainbow Mountains)

External links

• Canadian Mountain Encyclopedia

• Spectrum Range colours.JPG

  Spectrum Range colours from heavy mineralization
  

• Nahta cone from east june 2006 (Spectrum Range).JPG

  Nahta Cone of the Spectrum Range