Mount Boucherie is composed primarily of rhyolite and andesite, which gives the mountain its yellow, tan and pinkish colours on the north and south flanks. The more prominent black and dark gray east and north-east face is dacite.
The mountain known as Mount Boucherie consists primarily of rhyolite and andesite, responsible for its distinctive yellow, tan, and pink tones on the northern and southern faces. In contrast, the eastern and northeastern sides are predominantly composed of black and dark gray dacite.