The HALL CREEK asbestos showing is located approximately 9.5 kilometres north of Carmi, on the west side of Hall Creek canyon.
The showing consists of asbestos veins which cut through a serpentinized peridotite of the Carboniferous-Permian Anarchist Group. The serpentine and asbestos occur in the lower 3 metres of a sill-like black saxonite (peridotite?) porphyry which is approximately 20 metres thick. The serpentine occurs as green bands in the black rock and the asbestos occurs in little veinlets in the serpentine. The bands and veinlets lie more or less parallel to the lower contact of the sill. The asbestos veins are seldom more than 2.5 centimetres thick.