The Devastator Assemblage

The Devastator Assemblage is a geological formation comprising a portion of the Mount Meager massif in southwestern British Columbia, Canada.

[1] This 500 m (1,600 ft) thick rock unit was formed during a period of volcanic activity between 1,900,000 and 500,000 years ago.

The eastern portion of The Devastator Assemblage comprises the partly preserved vent and felsic volcanic rocks while the western portion consists of crudely layered tephra.

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Histogram showing the eruptive history of the Mount Meager massif. The eruptive period that created The Devastator Assemblage is shown as a rectangle between 1.4 and 1.6 Ma.