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Figure 3.
(A) Average Yb/Gd (crustal thickness proxy) compared to the percentage of S-type zircons with its 95%
confidence envelope. (B) Th/Yb (crustal input proxy) compared to a global compilation of ages versus
temperature/pressure (T/P) (°C/GPa) of high dT/dP (granulite−ultrahigh temperature [UHP])
(red); intermediate dT/dP (eclogite−high-pressure granulite) (purple); and low dT/dP (high-pressure−UHP)
metamorphism (blue) from Brown and Johnson (2018). (C) U/Yb (crustal input and fluid input proxy)
compared to a global compilation of passive margin abundance from Bradley (2008). Tenure of
supercontinent/cratons from Bradley (2011), increases in atmospheric oxygen, early “whiffs” of oxygen
(green arrows) and intervening boring billion from Holland (2006) and Lyons et al. (2014), and snowball
Earth glaciations adapted from Sobolev and Brown (2019). Supercontinent/craton abbreviations: K—Kenor;
Su—Superia; Sc—Sclavia; N—Nuna; R—Rodina; G—Gondwana; P—Pangea. NOE—Neoproterozoic oxygenation event;
GOE—Great oxygenation event.
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