| Masset Formation | |
|---|---|
| Stratigraphic range: Oligocene–Miocene | |
| Type | Geological formation | 
| Lithology | |
| Primary | Calc-alkaline volcanic rocks | 
| Location | |
| Country | .svg.png.webp) Canada | 
The Masset Formation is a volcanic formation on Graham Island of Haida Gwaii in British Columbia, Canada. It consists of calc-alkaline volcanic rocks related to subduction of the pre-existing Farallon Plate.[1] The Masset Formation is part of the Pemberton Volcanic Belt.[1]
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