The Shulaps Range chromite showing is located 2 kilometres east of the southeast end of Marshall Lake. The showing is within serpentinite and serpentinized peridotite of the Permian and older Shulaps Ultramafic Complex, and structurally imbricated with chert and phyllite of the Mississippian to Jurassic Bridge River Complex (Group). Chromite occurs generally disseminated throughout the serpentinized ultramafic rocks as an accessory mineral.

Leech (1953) initially identified eight massive chromite lenses occurring within serpentinite (Bulletin 32). The chromite lenses are 1.5 metres by 1.0 metre and 0.5 metre by 0.25 metre in size (as exposed) and consist of massive chromite with serpentine and talc, mostly along smooth sheared margins which give the pods a lozenge shape. One sample assayed 57.43 per cent chromium oxide (Cr2O3) (Bulletin 32).