Figure F17. Photomicrographs (in cross-polarized light) of plagioclase phenocrysts from a plagioclase-clinopyroxene-olivine-phyric pillow basalt (Unit 2) in Samples 183-1140-31R-1 (Piece 3B, 53-57 cm) and 183-1140-31R-2 (Piece 4, 16-20 cm). The plagioclase phenocrysts in (A) and (B) show a marked compositional zoning pattern from core to rim. The plagioclase core in (A) contains several melt inclusions.