The Minister of Mines Annual Report for 1899 records the presence of kyanite crystals scattered in biotite muscovite schist "on the ridge south of Summit Creek". The plotted location (to within 5 kilometres) may be a little to the west of the most likely location according to Geological Survey of Canada Map 1714A and recent mapping by Brown et al. (Fieldwork 1994), which show the highest grade (kyanite-sillimanite amphibolite facies) on and to the east of Creston Mountain, in metamorphosed Aldridge Formation rocks of the Middle Proterozoic Purcell Supergroup. The Fieldwork 1994 map also shows several locations where kyanite was confirmed by petrographic or microprobe analysis (map, page 138).