Geology and petrology of Quaternary volcanic rocks, Garibaldi Lake area, southwestern British Columbia: summary.

Subduction of the Juan de Fuca plate beneath the N American plate has been accompanied by Pleistocene-Holocene eruptions of basalt, andesite, and dacite along the Garibaldi volcanic belt in SW British Columbia (Souther, 1977; Keen and Hyndman, 1979). The 25km-wide belt, comprising at least 18 volcanic complexes, lies approximately 250km inland from the convergent margin. It extends from Mount Garibaldi, at the head of Howe Sound, N-westerly for 140km to Bridge River. Volcanism in the Garibaldi Lake area, about 6km N of Mount Garibaldi, produced a succession of flat-lying olivine basalts in the Cheakamus River valley, basaltic-andesite lavas at The Cinder Cone and Sphinx Moraine centers, and a line of three andesitic complexes: The Table, Mount Price, and The Black Tuck.-Author