[13] At the same time it may be safely assumed (as Professor Ramsay believes to be the case) that granite in most cases is a metamorphic rock; yet are there many instances in which it may with greater truth be considered as a true plutonic rock.
[14] “Elements of Geology,” p. 716, 6th edition.
[15] “Elements of Geology,” p. 717.
[16] Ibid, p. 718.
[17] “Geology of the Island of Arran,” by Andrew C. Ramsay. “Geology of Arran and Clydesdale,” by James Bryce.
[18] See Quarterly Journal of Geological Society, vol. viii., pp. 9 and 10.
[19] For full information in reference to the rocks and geology of this part of France, the reader is referred to the masterly work on “The Geology and Extinct Volcanoes of Central France,” by G. Poulett Scrope, 2nd edition, 1858.
[20] “Volcanoes,” 2nd ed.
[21] “Elements of Geology,” p. 596.
[22] Ibid, p. 677.