ORIGINAL ARTICLE: 2017, v. 13, no. 2, p. 559–576, https://doi.org/10.1130/GES01363.1. Published online 27 January 2017.

ADDENDUM: 2017, v. 13, no. 6, p. 2231, https://doi.org/10.1130/GES01363a.1. Published online 1 December 2017.

ERRATUM: 2019, v. 15, no. 4, p. 1459, https://doi.org/10/1130/GES01363e.1. Published online 10 July 2019.

In Figure 6B, two curving lines just above the “?” label were unintentionally displayed because of a conversion error. The corrected figure follows.

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