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This year marks the 25th anniversary of the discovery of coesite in metamorphic rocks of supracrustal origin. This initiated a revolution of the plate tectonics theory due to intensive studies of ultrahigh pres-sure metamorphism and continental deep subduction. The occurrence of coesite was
This year marks the 25th anniversary of the discovery of coesite in metamorphic rocks of supracrustal origin. This initiated a revolution of the plate tectonics theory due to intensive studies of ultrahigh pres-sure metamorphism and continental deep subduction. The occurrence of coesite was