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. 2016 Mar;472(2187):20160018. doi: 10.1098/rspa.2016.0018

Figure 1.

Figure 1.

(a) Chevron folds in layered rocks near Millook Haven (UK). (b) Detail of the chevron folding. (c) A Lopha cristagalli seashell, also called a ’cockscomb oyster’, is common in the Indo-West Pacific, where it lives in coral reefs at shallow depth. The shell clearly shows folding. (Online version in colour.)