Milbanke Sound Group

sopka – Pyroclastic cone(s), Canada, North America Volcanic Regions

Kde

Canada, North America Volcanic Regions

Typ (GVP)

Pyroclastic cone(s)

Nadmořská výška

233 m

Tektonické prostředí

Intraplate / Continental crust (> 25 km)

Poloha

52,498°, -128,723°

Swindle, Lake, and Lady Douglas Islands in the Milbanke Sound area of the Fiord Ranges in west-central British Columbia contain cinder cones of Holocene age. Kitasu Hill on the western side of Swindle Island is a young basaltic cone that produced lava flows that extend to the north. Other postglacial vents identified by Dolmage (1921, 1924) are correlated by lithology only and may be as old as Tertiary (Baer, 1973; Holland, 1976). Basaltic tuff breccias on Lake Island and Lady Douglas Island originated from Helmet Peak on Lady Island. Basaltic lava flows from Price and Dufferin Islands overlie adjacent beach deposits (Souther; in Wood and Kienle, 1990).

Text: Smithsonian Global Volcanism Program.

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