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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Mayank vedwal Vedwal
Here option A abd C are correct... because according to graph you can see that M1 event consist deformation D1 and D2 which form schistosity S1 and S2. Since the schistosity generates in an event where the role of pressure is significant so M1 event refer to regional metamorphism and M2 produces no schistosity so M2 refers contact metamorphism. S1 cleavage is associated with deformation D1 and it represents continuous cleavage while S2 represent crenulation cleavage.. .. and the garnet appears during event D1 deformation so it is sy tectonic with D1.... and andalusite during M2 event so it doesn't appear in waining (end) stage of D2 , it appears after D2 deformation....... For dealing such type of questions please check page 525 of jd winter
Thank you . It really helped.