Extended Data Fig. 5: Modeled oxygen isotope exchange rates over time.
From: Limited Archaean continental emergence reflected in an early Archaean 18O-enriched ocean
Oxygen isotope exchange rates used to make different δ18O curves in Figure 3. We assume 2 - 4% modern exchange rates initially for the first row, which then increase to modern rates by 2.5 Ga The second through fourth rows impose continental emergence at 4.4, 3, and 0.9 Ga, increasing to modern values over ≈ 500 million years.
