1837 7 421 The chain is composed of mica slates,..quartz schists, quartzites and diorites.
1940 F. F. Grout (ed. 6) x. 237 With increase of the mica, such quartzites pass through schistose quartzite and quartz-schist into mica-schists.
2005 31 100/2 This formation is made up of a lower unit of paragneisses and an upper unit of quartz schist and quartz-mica schist.