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. 2013 Aug 7;280(1764):20130718. doi: 10.1098/rspb.2013.0718

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© 2013 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 5. — Diagram representing the evolution of ridge positions in the Drake Passage relevant to the divergence of Pacific and non-Pacific kiwaids during the Oligocene and Miocene, modified from Vérard et al. [49] and Breitsprecher & Thorkelson [50]. Grey areas represent non-oceanic plate regions. Double lines denote active spreading segments of the ridges. Grey lines represent faults and fracture zones. Solid black lines with triangles denote subduction zones. SA, South America; Ant, Antarctica; CR, Chile Rise; ESR, East Scotia Ridge; A-PR, Antarctic–Phoenix Ridge; WSR, West Scotia Ridge; A-AR, American–Antarctic Ridge. (Online version in colour.)