The Proceedings of the Eighth International Conference on Creationism (2018)

Cho et al. ◀ Strength-reducing mechanisms in mantle rock during the Flood ▶ 2018 ICC 713 Figure 2 . Static grain growth experimental data performed by Hiraga et al. (2010) and Tasaka & Hiraga (2013). Squares, circles, and triangles represent the experimental data at various temperatures and pressures. The lines show the calibrated model using Eq. (8) using the least-square method. Note that these data cannot provide a pertinent pressure dependence of olivine’s static grain growth just because of the small range of pressures. Alternatively, we simply used an average dependence among the other mantle minerals for the pressure dependence ( i.e. , activation volume of the grain growth process). Figure 3 . Relationship between the grain size and the stress of olivine on a log-log scale. As the grain size increases, the stress decreases. The deformation experiments were performed by Hansen et al. (2012), Karato et al. (1980), and Van der Wal et al. (1993) at different experimental conditions. These data yield a consistent value for the exponent z in Eq. (12) of 0.8, regardless of the experimental conditions.