A Manual of Elementary Geology / or, The Ancient Changes of the Earth and its Inhabitants as Illustrated by Geological Monuments

by Sir Charles Lyell

[463-A] For the geology of Arran consult the works of Drs. Hutton and MacCulloch, the Memoirs of Messrs. Von Dechen and Oeynhausen, that of Professor Sedgwick and Sir R. Murchison (Geol. Trans. 2d series), Mr. L. A. Necker's Memoir, read to the Royal Soc. of Edin. 20th April, 1840, and Mr. Ramsay's Geol. of Arran, 1841. I examined myself a large part of Arran in 1836.

[469-A] Geol. Trans., 2d series, vol. iii. p. 480.

[469-B] The Silurian System of Rocks, as developed in Salop, Hereford, &c., p. 245.

[469-C] Ibid., p. 246.

[470-A] Introduction to Geology, chap. iv.

[471-A] Silurian System of Rocks, &c., p. 246.

[471-B] Report, Brit. Ass., Cork, 1843, p. 60.

[471-C] Quart. Geol. Journ., vol. iii. p. 87. 1847.

[472-A] Geol. Obs. on S. America, 1846, p. 168.

[472-B] Margaric acid is an oleaginous acid, formed from different animal and vegetable fatty substances. A margarate is a compound of this acid with soda, potash, or some other base, and is so named from its pearly lustre.