ORIGINAL ARTICLE: 2018, v. 46, no. 10, p. 923–926, https://doi.org/10.1130/G45144.1. First published 11 September 2018.

ERRATUM PUBLICATION: 2018, v. 46, no. 11, p. 1023, https://doi.org/10.1130/G45144E.1.

In Figure 2, the vertical axis labels of panel C are incorrect. The numbers on the vertical axis, from bottom to top, should be 101, 102, and 103.