GRD01XLS0
M-52
Augen Gneiss
Unknown
None
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1
Ritter 154 › Cabinet 24 › Drawer A
augen,coarse-grained
Large sample of gneiss composed of biotite-potassium feldspar-quartz. Potassium feldspar augen. Discontinuous banding.
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myrmekitic texture
2.5
plane
myrmekitic texture
2.5
crossed
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scan
crossed
GRD01XLT0: Large K-spar and plagioclase porphyroblasts. Minor amount of myrmekitic texture. 30% biotite, 30% K-spar, 20% plagioclase, 20% quartz. Trace opaque. (C. Eichler)
N/A
N/A