In northern British Columbia, remnants of a shield volcano are found throughout the western Cassiar Mountains. This prehistoric shield volcano, known as Maitland Volcano, was erupted from five to four million years ago on a mature eroded surface as thin hawaiite and basaltic lava flows engulfed the surrounding landscape. Remnants of this prehistoric shield volcano include a cluster of 14 volcanic plugs and scattered cliff-bounded basaltic lava flows.