Metallic glacial glass (MGG) formation (Reproduced from ref. [3]). Upon heating the metallic glass (MG) passing the glass transition temperature (T_g), a primary exothermic peak representing glaciation with a peak temperature (T_p) is detected, which is followed by the onsets of crystallization (at T_x) and melting (at T_m). By summarizing the characteristic temperatures with the heating rates, a continuous-heating-transformation diagram showing MG, MGG, crystal and supercooled liquid (SCL) regions is constructed. The green open symbol represents the reversal of glaciation, i.e., the transition from MGG-forming liquid to MG-forming liquid.