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Foliation is even evident on the microscopic scale. The following images are photomicrographs made by looking at thin s'ices of rock under a microscope. The individual grains of the rock

are visible. Looking at the alignment of the minerals, can you determine which of the pictures properly shows the direction of compression leading to the development ol this metamorphic texture? *B *D *A *C

Fig: 1

Fig: 2