Geol. Mag. 148 (5–6), 2011, pp. 925–939._ Cambridge University Press 2011. The online version of this article is published within an Open Access environment subject to the conditions of the Creative Commons Attribution-NonCommercial-ShareAlike licence <http://creativecommons.org/ licenses/by-nc-sa/2.5/>. The written permission of Cambridge University Press must be obtained for commercial re-use. doi:10.1017/S0016756811000471 Significance of angular unconformities […]