Composition
NORMAL
Quartz
Feldspar
Biotite
Amphibole
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ACCESSORY
In red if present
Garnet
Staurolite
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Not only is this rock banded, the bands have been folded.
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Description
Banded foliation composed of layers/zones of light colored quartz, feldspar interlayered with layers/zones of dark colored biotite and amphibole. The minerals bands in this specimen are well developed, although the folding in the rock may reduce some of the clarity of that.
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