Heart Peaks is one of the four volcanoes in the Northern Cordilleran Volcanic Province suggested to have erupted the Finlay tephras . These are situated throughout northwestern British Columbia and likely extend east into the Canadian Rockies . In the Finlay River and Dease Lake areas , two tephra deposits are situated between sand , silt , mud and gravel . They are both phonolitic to trachytic in composition and high in iron ( II ) oxide , indicating that the tephras were possibly erupted from a single volcano . Regional plant macrofossils immediately overlying the youngest Finlay tephra deposit are and radiocarbon years old . This indicates that the Finlay tephras are Early Holocene in age and were deposited shortly after the regional Fraser Glaciation retreated
Finlay tephras
Finlay tephras
Heart Peaks