(Solved): B. Explain what you think would happen if heat and pressure continued to increase in the direction ...

B. Explain what you think would happen if heat and pressure continued to increase in the direction of the arrow, beyond the limit of this graph: C. Three rock samples containing indicator minerals are presented here. For each, give the metamorphic rock name, a likely protolith, and its metamorphic grade based on the indicator mineral present (low, intermediate or high). Remember the grade is determined by the highest-grade indicator mineral you can find in the rock. PART IV. Metamorphic Environments Metamorphic rocks, their minerals, and grade can tell us a lot about where they were made. The pressures and temperatures required to accomplish certain forms of metamorphism exist in particular places on (and in) Earth.