Fig. 19. Large albite-twinned plagioclase crystal is replaced in its interior by large and small islands of K-feldspar (light gray), which locally are bordered by rim myrmekite. The K-feldspar also replaces the exterior of the plagioclase in the upper center and upper left side and is also bordered by rim myrmekite. Biotite (brown; upper left). Campers Flat granodiorite, 1.1 km southwest of Phipps Peak. Thin section 382 from Loomis collection.