Note 303 — Chapter XLI · THE ERUPTIVE VENTS OF THE BASALT-PLATEAUX

This extensive mass was not separated from the "syenite" of the Red Hills by Macculloch. Von Oeynhausen and Von Dechen noticed it as a conglomerate with quartz pebbles, but did not realise its volcanic nature (Karsten's Archiv, i. p. 90). In my map of Strath (Quart. Jour. Geol. Soc. xiv. plate i.) I distinguished it from the rock of the Red Hills, but no name for it appears in the legend of the map, nor is it referred to in the text. Its character as a true volcanic agglomerate was recognised by Professor Judd, op. cit. p. 255. See postea, pp. 384 et seq.