Region of Temperature(C diagenesis 200 400 600 Region of tow-grade 2000 amorphism Continental crust 4000 Increasi 15E grade of 200° C metamorphism 6000 metamorphism 400°C 3 8000Pressure and conditions 600°C o 10,000in the crust not found 800C Melting starts 12000 Mantle The metamorphic gradeThe metamorphic grade