Gneiss
This is a sample of the famous Lewisian Gneiss. Note the sutured grain boundaries between quartz. This rock also contains plagioclase, biotite, and K-feldspar.
UNC sample
H-198
Rock type
gneiss
Locality
Strohness, Orkneys, Great Britain
Gneiss
This is a sample of the famous Lewisian Gneiss. Note the sutured grain boundaries between quartz. This rock also contains plagioclase, biotite, and K-feldspar. |
UNC sample H-198 | |
Rock type gneiss | ||
Locality Strohness, Orkneys, Great Britain | ||
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