Microcline (K-feldspar) 
Cross-hatched (or "tartan") twinning in microcline. Contrast this with polysynthetic twinning in plagioclase feldspar.
UNC sample
GSR X1540
Rock type
unknown
Locality
unknown
Microcline (K-feldspar) Cross-hatched (or "tartan") twinning in microcline. Contrast this with polysynthetic twinning in plagioclase feldspar. |
UNC sample GSR X1540 | |
Rock type unknown | ||
Locality unknown | ||
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