re: Now Closed: I'll answer any question you have about ROCKS!

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Here at the foot of Pikes Peak there is a lot of what's known as Pikes Peak granite. It is a pinkish granite due to it containing a lot of potassium feldspar minerals. Sometimes I see big chunks of PP granite that have alternating layers of pink granite and dark gray granite. So my question is that given that granite is composed of magma that cooled slowly, what causes the striations or layers in these rocks?

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