Fig. 4.

Isostatic global sea level and continental coverage model. (A) Temporal evolution in average continental freeboard driven by erosion, subsequent thermal subsidence, and sediment accumulation. Neoproterozoic glacial erosion is distributed in proportion to the duration of each glacial interval. (B) Corresponding modeled continental coverage fraction assuming a constant hypsometric profile, compared with the observed North American record from Macrostrat (7–9) and Ronov’s (23) global record of Phanerozoic marine sediment coverage.