A) Volumetric trapped melt fraction (FTL) for each SMG sample analyzed in transect (yellow) and all (white) SMG samples calculated using the trace element unmixing model. Trapped melt calculations are made by projecting sample data orthogonally onto the MC = 0.24 tie line and using the lever rule to determine relative proportions of both melt and cumulate end members. Range of maximum packing fractions (in terms of melt fraction) determined from analysis of centrifuge experiments in Florez et al. (2024) are superimposed. Here, a value of ca. 0.3 aligns well with the minimum observed melt fraction estimates. B) FTL over entire exposed batholith. C) Forward simulations to calculate the time required to form an eruptible melt horizon of a given thickness using the forward model from Florez et al. (2024). Here, the calculations are performed using different grain diameters.