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Ropy Surfaces of Lava in Iceland
Published online by Cambridge University Press: 01 May 2009
Abstract
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- Copyright © Cambridge University Press 1916
References
page 476 note 1 In reference to the footnote to my paper, Geol. Mag., Sept. No., p. 390, I find that Dr. Pjetursson now regards his “Graa Etage” of Middle Northern Iceland as of Post-Tertiary age. This view presents difficulties, and I prefer to hold to his former idea as there indicated. The doubt I expressed relates, not to the Tertiary age of the “Graa Etage”, but to the adequacy of the evidences therein of a general “glacial period”.