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re: Now Closed: I'll answer any question you have about ROCKS!
Posted on 7/10/14 at 3:04 pm to Pectus
Posted on 7/10/14 at 3:04 pm to Pectus
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?
1
Posted on 7/10/14 at 3:10 pm to MountainTiger
quote:
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?
Ooh! That's actually gneiss!
I know what you're talking about because I've seen it.
That gneiss is older than the Pikes Peak Granite. That gneiss is all along the walls of Royal Gorge.
This post was edited on 7/10/14 at 3:12 pm
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