[256] “Tracings of the North of Europe,” 1850, pp. 48−51.
[257] Quart. Journ. Geol. Soc., vol. ii., p. 364.
[258] “Tracings of the North of Europe,” by Robert Chambers, pp. 259, 285. “Observations sur les Phénomènes d’Erosion en Norvège,” by M. Hörbye, 1857. See also Professor Erdmann’s “Formations Quaternaires de la Suède.”
[259] “Glacial Drift of Scotland,” p. 29.
[260] Geological Magazine, vol. ii., p. 343. Brit. Assoc. Rep., 1864 (sections), p. 59.
[261] Trans. Roy. Soc. Edin., vol. vii., p. 265.
[262] “Tracings of Iceland and the Faroe Islands,” p. 49.
[263] See Chap. XXIII.
[264] Mr. Thomas Belt has subsequently advanced (Quart. Jour. Geol. Soc., vol. xxx., p. 490), a similar explanation of the steppes of Siberia. He supposes that an overflow of ice from the polar basin dammed back all the rivers flowing northward, and formed an immense lake which extended over the lowlands of Siberia, and deposited the great beds of sand and silt with occasional freshwater shells and elephant remains, of which the steppes consist.
[265] Proc. Roy. Phys. Soc., Edin., vols. ii. and iii.