You are working in a Proterozoic fold-and-thrust metamorphic belt in the outskirts of Australia. You start to observe that the typical rock type is made of visible platy crystals forming a well-defined schistosity will spaced syn-tectonic garnet porphyroblasts. At what temperature do you think it is more likely the rock recrystallized? 400-600 C 200-300 C 100-200 C 600-800 C >800 C 300-400 C

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