Found this in a creek in the mountains of North Carolina. enter image description hereenter image description here


closed as off-topic by Leukocyte, Erik, Jan Doggen, gansub, trond hansen Aug 27 at 9:57

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  • "Questions about rock identification requests are off-topic. For more information, see the announcement on meta." – Leukocyte, Erik, Jan Doggen, gansub, trond hansen
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    $\begingroup$ Please read meta.earthscience.stackexchange.com/questions/124/… and update your question with additional information. $\endgroup$ – Jan Doggen Feb 9 '17 at 8:36
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    $\begingroup$ @JanDoggen in theory yes, but this is actually a textbook example of a garnet schist. Any first year or amateur geologist should be able to name it just by looking at this photo for 2 seconds. $\endgroup$ – Gimelist Feb 9 '17 at 9:56

That looks like a garnet schist. The large crystals appear to have a rhombic dodecahedral habit typical of garnet.

  • $\begingroup$ Indeed. And a beautiful example of one! $\endgroup$ – Gimelist Feb 9 '17 at 9:57
  • $\begingroup$ Not really a beauty. The garnets on the surface are all busted up. $\endgroup$ – MaxW Feb 11 '17 at 4:57

This rock is probably a garnet schist, possibly a garnet-mica schist. The dodecahedral shape and color of the red-brown crystals means they are most likely garnet. Because of the rock's platy texture it iss most likely a schist. Medium grade metamorphic rocks are common in all of Appalachia. And, if it's shiny at all it probably has micas in it as well as garnet. I couldn't tell from the pictures. Also the size of the crystals could tell us something interesting about the formation of the rock, but I can't tell just from looking at it.


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