Fig. 2: Basaltic accumulation at the end of the model evolution after 400 Myr.
From: How lowermost mantle viscosity controls the chemical structure of Earth’s deep interior
Blue-to-red background colors illustrate temperature, and green colors indicate the presence of basalt. The white line marks the ppv phase transition. Full model evolution is shown in Movies S7–22. Each panel shows a different model, with ppv being 1000× weaker than bridgmanite (a–d), 100× weaker (e–h), 10× weaker (i–l) or no viscosity reduction (m–p), and crustal thickness increasing from 10 km (d, h, l, p) to 40 km (a, e, i, m).
