The Bella Coola Valley asbestos showing occurs within the east- ern part of the Coast Crystalline Belt. The region is underlain by supracrustal metasedimentary and metavolcanic rocks into which pre- to post-kinematic batholithic intrusions have been emplaced. The supracrustal rocks may be, in part, Jurassic Hazelton Group or, in some cases, older.

The asbestos occurs as short, narrow stringers within serpent- inite which occurs in rocks described as greenstone and chlorite schist.