Abstract

"The south-eastern margin of the Glen Tilt mass consists of a series of diorites showing a considerable variation in mineralogical and chemical composition. Associated with, and enclosed within, the diorites are a number of small masses of coarser hornblende-felspar rocks which are described as appinites. There is an absence of sharp contacts between the various rock types of the complex and a hybrid origin is suggested to account for the mineralogical assemblage of the appinites." Chemical analyses are included.

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