Fig. 6. Ghost myrmekite in K-feldspar (black and gray with cross-hatched pattern). Note that the ghost myrmekite area in the middle contains clusters of ovoid quartz islands (black) that occur between two ghost myrmekite areas with clusters of ovoid quartz islands (white), indicating different optic orientations of the quartz in these three different quartz clusters in the K-feldspar. Biotite (brown), muscovite (bright colors), and quartz (white, gray) are on the margin of the K-feldspar.