Fig. 28. Poikilitic microcline (grid-twinned) that cuts the border of the mafic enclave and which has preferentially replaced the plagioclase in the mafic enclave. Some remnant plagioclase grains, however, remain in the microcline. Locally, some of these remnant plagioclase grains are bordered by rim myrmekite with very tiny quartz vermicules (not obvious in view). Desolation Valley granodiorite. Thin section 203 from Loomis collection.