11. What is the source of pressure required for metamorphism to occur? A Heat from magma bodies in touch with surrounding rock B. Pressure from weight of overlying rock. C. Cementation and lithification D. Hydrothermal solutions​
Explanation: because the pressure experienced by a rock during metamorphism is due primarily to the weight of the overlying rocks (i.e., lithostatic pressure) and is generally reported in units of bars or kilobars.
