The Harrison Lake asbestos occurrence is reported to be situated on the north side of the south tributary to Fifteen Mile (Talc?) Creek, approximately two kilometres east of Harrison Lake.

The Talc Creek area is underlain by a northwest trending, fault bound belt of ultramafic rocks of probable Paleozoic and/or Mesozoic age. Light to dark green, brittle, fibrous tremolite in 15 to 30-centimetre wide veins are reported to be hosted by serpentine within or adjacent to this belt (Industrial Minerals File).