Monmouth Creek complex

The Monmouth Creek complex is a volcanic mountain complex in southwestern British Columbia, near Squamish at the west side of the Squamish River mouth. Part of the Squamish volcanic field in the southern Garibaldi Volcanic Belt, it lies within the northernmost extent of the Cascade Volcanic Arc. Its most notable feature is an unusual volcanic edifice of basaltic andesite to dacite, although its age remains unknown. The complex may consist of dikes and lava domes formed beneath ice, with at least four summit dikes rising as lava spines about 60 to 180 m high. The tallest, The Castle, displays horizontal and radiating columnar joints, and dacite composes the highest flows and spines.

British Columbia · Canada