The Carn Chuinneag-Inchbae complex in eastern Ross-shire, north Scotland, occurs in Moine rocks which were partly hornfelsed by its intrusion and later subjected to regional metamorphism. The changes in the pelitic hornfelses have been studied to determine the original mineral composition and to interpret the metamorphic history. Chemical analyses of the pelitic hornfelses, biotite, and garnet are given. The history of garnet formation is considered at some length, and it is concluded that some of the garnet resulted from the earlier contact metamorphism, while some of it was the product of the later regional metamorphism.

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