Granoblastic fabrics

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Granoblastic fabric [Mechanics]: In high-grade gneissic rocks, mineral grains are usually bounded by straight or slightly bent grain boundaries which define regular, polygonal pattern, known as granoblastic fabric. This fabric develops usually where diffusion processes and recrystallization occur relatively fast enhanced by high to really high-grade metamorphic conditions [Passchier, C.W., Myers, J.S. and Kröner, A., 2012. Field geology of high-grade gneiss terrains. Springer Science and Business Media.].