 As prevailing winds sent ash and dust as far as to the east, it created the large Bridge River Ash deposit, extending from Mount Meager to central Alberta.Pyroclastic flows travelled downstream from the vent and buried trees along Meager's forested slopes, which were burned in place.An unusual, thick apron of welded vitrophyric breccia may represent the explosive collapse of a former lava dome which deposited ash several meters in thickness near the vent area.