In the Trident Mountain area, 15 kilometres east-southeast of Mica Creek kyanite is extremely abundant in pelitic schists and quartz-kyanite segregation veins; kyanite often comprises in excess of 10 per cent of the rock. This area is underlain by the Lower Aluminous Pelite division of the Horsethief Creek Group (Perkins, 1983), a unit which commonly contains abundant aluminosilicate minerals.