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Published online by Cambridge University Press: 01 May 2009
1 See a paper on the Ages of the Trail and Warp by the writer, GEOL. MAG. Vol. IV. pp. 193–199, 1867.
2 See discussion on Prof. O. Heer's paper on fossil plants from North Grinnell Land; Quart. Journ. Geol. Soc. 1878, vol. 34, p. 70.
3 Journ, Quart. Geol. Soc. 1878, vol. 34, p. 375.Google Scholar