The end-state of each GeoFLAC model with an initial mantle potential temperature of 1350 ºC. Models 12, 4, and 6 have a full-spreading rate of 1 cm/yr and models 13, 5, and 8 have a full-spreading rate of 2 cm/yr. They are further arranged by surface heat flux, from 55 to 75 mW/m2 in descending order. Isotherms for 400, 600, 800, 1000, 1200, and 1300 ºC are plotted as well as the melt fraction (scaled for each individual model to bring out details for low melt fractions).