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Why might metamorphic rocks show signs of banding more than igneous rocks?

April 26, 2017Banding igneous metamorphic rocks signs

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Why might metamorphic rocks show signs of banding more than igneous rocks?

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Heterogeneous rock types like granite, will form banding under intense heat and pressure as is experienced during metamorphosis. The banding is a result of compression stress causing a parallel alignment of the rock’s minerals. Igneous rocks are formed from the solidification of magma, and therefore do not exhibit banding or layering.