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.
Mount Boucherie is mainly constructed from rhyolite and andesite, which result in its characteristic yellow, tan, and pink appearance on the north and south slopes. The prominent east and northeast faces are made of darker dacite.