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. 2015 Jan 5;5:749. doi: 10.3389/fpls.2014.00749

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Copyright © 2015 Bond.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Examples of the shifts in d¹³C associated with the rise of savannas from the Late Miocene derived from palaeosols (A)Quade and Cerling (1995), (B)Fox and Koch (2003), and (C) tooth enamel (Cerling et al., 1997). Figure from Osborne (2008; with author’s permission).