Q 1(e). Describe ultrahigh-pressure and ultrahigh-temperature metamorphism. (UPSC 2025, 10 Marks, 150 Words)

Theme: Ultrahigh-Pressure and Ultrahigh-Temperature Metamorphism Where in Syllabus: (Geology and Earth Sciences.)
अतिउच्च दाबीय एवं अतिउच्च तापीय कायान्तरण का वर्णन कीजिए।