Published online by Cambridge University Press: 01 May 2009
Speculation as to the causes of the great intrusions known as batholiths is coeval with petrology as a science. Daly says that batholiths are “the least understood of all the intrusive bodies. If they were truly understood there would be no ‘problem’ of the igneous rocks”.1 This, no doubt, puts the matter too strongly, but there is nevertheless much truth in the statement, and the “problem” is of the greatest importance in petrogenic theory.
page 121 note 1 Daly, R. A., Igneous Rocks and their Origin, New York, 1914, p. 89.Google Scholar
page 122 note 1 U.S. Geol. Surv., chap. vi.Google Scholar
page 122 note 2 For general summaries see: Harker, A., Natural History of the Igneous Rocks, Lond., 1909, chap, iii;Google Scholar Barrell, J., “Marysville Mining District (Montana)”: U.S. Geol. Surv., prof, paper, No. 57, 1907, p. 151 et seq.Google Scholar
page 124 note 1 Op. cit.
page 125 note 1 Barrell, J., “The Status of the Theory of Isostasy”: Amer. Journ. Sci., 1919, vol. xlviii, p. 292.Google Scholar
page 125 note 2 Oldham, B. D., “Support of the Himalayas”: Abs. Proc. Geol. Soc., 1916, No. 985.Google Scholar
page 126 note 1 Richardson, W. A., “The Frequency-Distribution of Igneous Rocks, II”: Min. Mag., March, 1923 (in the press).Google Scholar
page 126 note 2 Op. cit., p. 37.
page 127 note 1 Oldham, R. D., “Structure of the Himalayas”: Mem. Geol. Sun: Ind., Pt, 2, 1917, p. 114 et seq.Google Scholar
page 127 note 2 Daly, op. cit., pp. 91–2.