The Noaxe Creek magnesite showing is 0.5 kilometres northeast of the confluence of Noaxe and Tyaughton creeks. The exposure is quartz-carbonate-mariposite altered serpentinite (listwanite) within a fault strand adjacent to the Cretaceous to early Tertiary Marshall Creek fault system. The serpentinite is probably related to the Permian and older Shulaps Ultramafic Complex to the east. Magnesite (of unknown abundance) comprises part of the listwanite alteration assemblage. This listwanite alteration assemblage along a major high angle fault is evidence for the intense focussed hydrothermal activity that has taken place, probably near-surface and relatively low temperature (epithermal).