Fig. 16. Microcline (dark gray) bordered by myrmekite grains agains biotite (dark brown; bottom and upper left). In the microcline are irregular remnant patches of plagioclase (light tan) with tiny quartz ovules (tiny black spots), and the ovules have the same diameter as the quartz vermicules in the myrmekite. The plagioclase patches are all in optical parallel continuity and have an irregular distribution. These relationships are inconsistent to their having been formed by exsolution from a high-temperature orthoclase crystal. The volumes of the patches are disproportional to the volumes of adjacent microcline from which they supposedly could have exsolved.