Rocks and Their Origins

by Grenville A. J. Cole

[56] I. Russell, "Glaciers of N. America" (1897), 25.

[57] See, for instance, T. W. Edgeworth David, "Evidences of glacial action in Australia," Q. Journ. Geol. Soc., 52 (1896), 289.

[58] For general discussions of Igneous Rocks, see J. J. H. Teall, "British Petrography" (1888); H. Rosenbusch, "Mikroskopische Physiographie," ed. 4 (1905-7); F. Zirkel, "Lehrbuch der Petrographie," ed. 2 (1894); A. Harker, "Natural History of Igneous Rocks" (1909); J. P. Iddings, "Igneous Rocks," 1 (1909).

[59] Cross, Iddings, Pirsson, and Washington, "Quantitative Classification of Igneous Rocks" (1903).

[60] Harker, op. cit., [ref. 58], p. 186.

[61] Iddings, op. cit., [ref. 58], p. 130 &c.

[62] Ibid., pp. 228-241.

[63] Scrope, "Considerations on Volcanos" (1825), 141.

[64] G. A. J. Cole and J. W. Gregory, "Variolitic Rocks of Mt Genèvre," Q. Journ. Geol. Soc., 46 (1890), 311.

[65] A. Geikie, "Ancient Volcanoes of Gt Britain," 1 (1897), 25. Also C. Reid and H. Dewey, "Pillow lava of Cornwall," Q. Journ. Geol. Soc., 64 (1908), 264.