Note 359 — Chapter XLV · THE ACID ROCKS
Reading edition
Mineralogical Travels, ii. 90.
[360] Western Isles, see the descriptions of Skye, Mull and Rum.
[361] Berger, Trans. Geol Soc. iii. (1816), p. 190; Portlock, Journ. Geol. Soc. Ireland, vol. i. (1834), p. 9.
[362] Zeitsch. Deutsch. Geol. Gesellsch. xxiii. (1871), pp. 54, 77, 84, 88.
[363] Tschermak's Min. und Petrog. Mittheilungen, 1878, p. 412. The chemical composition of this rock and its place among the rhyolites had already been determined by E. T. Hardman from analysis, Journ. Geol. Soc. Ireland, vol. iii. (1871), p. 32.