An example of this activity includes the massive Level Mountain shield volcano in northwestern British Columbia, which is capped by a 860 km3 (206 cu mi) dissected stratovolcano.[28] Plinth Peak of the Mount Meager massif in southwestern British Columbia is the source for a large-scale Plinian eruption that occurred 2,350 years ago, sending ash as far as Alberta Following massive Plinian eruptions, temperatures may decrease to cause volcanic winters.