single crystal of a size exceeding the mean grain size in the surrounding matrix and inferred to represent a remnant of an originally coarse grained rock. Porphyroclasts are common in mylonites.
Related terms:
single crystal of a size exceeding the mean grain size in the surrounding matrix and inferred to represent a remnant of an originally coarse grained rock. Porphyroclasts are common in mylonites.
Related terms: