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

Cho et al. ◀ Strength-reducing mechanisms in mantle rock during the Flood ▶ 2018 ICC 723 Figure 12 . Snapshots of the equivalent stress and viscosity in the base 10 logarithmic scale at the time of 20 days. Due to high strain rate, the viscosity of the entire mantle was significantly decreased from the initial reference viscosity that is comparable to the one of present day. Also, many low viscosity bands were observed. Because of the high pressure, the strength and viscosity in most of lower mantle were higher than in the upper mantle. Figure 13 . Comparison of the strength at the 30th day. In order to compare contributions of effect of each mechanism (recrystallization (REX), grain size (GS), and texture (SS)), we ran four simulations of different cases. The positive sign represents effect of that mechanism was turned on in that case. When the texture (plastic spin) effect was turned off, the maximum mantle flow velocity was decreased by almost half. From these preliminary case studies, this paper concludes that texture effect was the most significant in weakening the overall mantle rock strength.