Fig. 25. Myrmekite forms an outer rim on a large, albite-twinned plagioclase inclusion that is strongly inclined to the Ba-K growth zones of the orthoclase megacryst (light gray). Four other elongated plagioclase inclusions (lower left quarter) and one plagioclase inclusion (white; above the large inclusion) are also myrmekitic. All these myrmekite grains are in the interior of the megacryst. Biotite (brown).