High-grade, regional metamorphism produces significant and recognizable changes in the textures and mineral compositions of rocks.

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High-grade, regional metamorphism can cause rocks to undergo significant changes in their textures and mineral compositions. These changes are often used as indicators of the extent and intensity of metamorphism that the rocks have undergone. Examples of these changes include the growth of new minerals, the recrystallization of existing minerals into larger grains, and the development of new textures such as foliation. Therefore, it is true that high-grade, regional metamorphism produces noticeable changes in rocks.

High-Grade, Regional Metamorphism Produces Significant and Recognizable Changes in the Textures