The AnahimVolcanicBelt, which extends from the coast near Bella Bella easterly across central British Columbia to the eastern boundary of the Intermontane Belt, is interpreted to be the trace of a mantle hot spot.
The Garibaldi VolcanicBelt (Mathews, 1958; Green, et.al., 1988) is a northern extension of the Cascade VolcanicBelt in the western United States.
The central segment of the Garibaldi Belt (Souther, 1980) is defined by a group of eight volcanoes on the height of land east of Squamish River, and by remnants of basaltic flows preserved in the adjacent Squamish valley.
The Chilcotin Plateau Basalts east of the Garibaldi VolcanicBelt, is thought to have formed as a result of extension of the crust behind the Cascadia subduction zone.
Volcanics of the Garibaldi VolcanicBelt were first discovered and mapped in 1911.
The Garibaldi VolcanicBelt was formed by subduction of the Juan de Fuca Plate and the Explorer plates (remnants of the much larger Farallon Plate) under the North American Plate along the Cascadia subduction zone.
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