Fig. 5. Remnant plagioclase islands (tan) inside microcline (grid-twinned; gray) in granodiorite. Note that albite-twinning of the grid-twinning is in parallel optical alignment with albite-twinning of the plagioclase (light tan; upper right) and that the plagioclase islands in the microcline are in parallel optical alignment with the larger plagioclase crystal (upper right).