Fig. 6. Relatively coarse vermicules in myrmekite in the Thorr granodiorite west of southwest end of the Main Donegal granite. Epidote (reddish brown, center) with tiny quartz inclusions and biotite (green and brown) are coexisting minerals. K-feldspar (black and gray, cross-hatched twinning) is in upper left. Plagioclase (white, upper right) is adjacent to myrmekite.