[2] Conybeare and Phil. Geol., p. 401, and Farey’s Derbyshire, p. 243.
[3] Fournet, Études sur les Dépôts Métallifères.
[4] Carne, Trans. Geol. Soc., Cornwall, vol. iii, p. 238.
[5] Geol. Rep. on Cornwall, p. 340.
[6] Principles, chap. xxvii, 8th edit., p. 422.
[7] See Dr. Daubeny’s Volcanoes.
[8] Bulletin, iv, p. 1278.
[9] Sir H. De la Beche, MS. Notes on Irish Survey.
[10] Report on Geology of Cornwall, p. 310.
[11] Darwin’s South America, p. 209, etc.