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II.—Bala Lake and the River System of North Wales
Published online by Cambridge University Press: 01 May 2009
Extract
The evolution of rivers and the origin of lakes have recently attracted a considerable share of attention; and the principles which should guide us in tracing the development of a drainage system have been expounded by several authors, both in England and in America.
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References
page 204 note 1 Quart. Journ. Geol. Soc., vol. xxxii (1876), pp. 219–229Google Scholar. See also Mem. Geol. Surv., vol. iii (1881), 2nd ed., pp. 314–323.Google Scholar
page 204 note 2 Mem. Geol. Surv., vol. iii (1881), 2nd ed., pp. 306–313.Google Scholar
page 204 note 3 Morton, G. H.: Proc. Liverpool Geol. Soc., vol. viii (1897–1898), pp. 32–65, 181–204.Google Scholar Strahan, A.: Geol. Mag., 1899, pp. 111–117.CrossRefGoogle Scholar
page 204 note 4 Watts, W. W.: Brit. Assoc. Reports, 1895, pp. 683, 684.Google Scholar Brend, W. A.: Geol. Mag., 1897, pp. 404–407Google Scholar. Marr, J. E. & Adie, R. H.: Geol. Mag., 1898, pp. 51–61.CrossRefGoogle Scholar
page 205 note 1 Merionethshire (6 inches to 1 mile): Quarter-sheets xxii S.W., xxii N.W., and xxii N.E.
page 206 note 1 Quart. Journ. Geol. Soc., vol. xxxii (1876), p. 219.Google Scholar
page 206 note 2 Our positions were determined by compass bearings from the shore, and have no pretensions to precise accuracy. The section A–B and the south-eastern half of the section E–F are probably correct; but in the north-western half of the section E–F the angles of intersection were somewhat acute, and the positions of the soundings are therefore not so accurately fixed.
page 206 note 3 “On the Physical History of the Dee, Wales”: Quart. Journ. Geol. Soc., vol. xxxii (1876), pp. 219–229Google Scholar. See also Mem. Geol. Surv., vol. iii (1881), 2nd ed., pp. 314–323.Google Scholar
page 207 note 1 See, especially, “The Tarns of Lakeland”: Quart. Journ. Geol. Soc., vol. li (1895), pp. 35–48Google Scholar. “Additional Notes on the Tarns of Lakeland”:Google Scholar ibid., vol. lii (1896), pp. 12–16. “On the Lake Basins of Lakeland”: Proc. Geol. Assoc., vol. xiv (1896), pp. 273–286.Google Scholar
page 211 note 1 Afon Dwrnudo is the stream which flows past Llechwedd-fwyalchen.
page 214 note 1 It should be noted that there is no evidence to show which is the downthrow side of either M or N.
page 215 note 1 It may be noted that Mr. C. Davison's researches on earthquakes in Great Britain seem to indicate that even at the present time slips occasionally take place along faults which are, in their origin, of very ancient date.
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