In Vincent et al. (Reference Vincent, Carter, Lavrishchev, Rice, Barabadze and Hovius2010) the boxed key shown on Figure 2 includes the following definition:
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20180419074309567-0221:S0016756810000865:S0016756810000865_eqnU1.gif?pub-status=live)
The symbol diameter is inversely proportional to the AFT age or time lag and proportional to the erosion rate; the definition should therefore read:
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20180419074309567-0221:S0016756810000865:S0016756810000865_eqnU2.gif?pub-status=live)
(see scale bars below)