Published online by Cambridge University Press: 14 March 2018
In recent years a number of alkali-rich rocks have been described, containing barkevikite or 'barkevikitic hornblende.' So far as I am aware, however, no detailed examination has been made of the mineral since Brögger's work on the original material from Barkevik in Norway, with the exception of the investigation by Michel Levy and Laeroix. Hence, when a rock was found amongst the Permo-Carboniferous rocks of Ayrshire, with comparatively large crystals of barkevikite, it was decided to examine it in some detail.
page 138 note 1 Brögger, W. C., Geol. För. Förh. Stockholm, 1887, vol. ix, p. 269 Google Scholar; Zeits. Kryst. Min., 1890, vol. xvi, pp. 412-415.
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page 141 note 2 Quoted by Brögger, loc. cit.
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