Figure 7. Photomicrographs of the Hole 900A metamorphosed mafic rocks. A. Discontinuous oriented bands of recrystallized plagioclase crystals (light) and recrystallized clinopyroxene crystals (dark) in Sample 149-900A-86R-1, 51-55 cm, in plane-polarized light (PPL), that define the foliation observed in Figures 4-6. The wide dimension of the photomicrograph = ~2.7 mm. B. Another photomicrograph of the discontinuous oriented plagioclase and clinopyroxene bands in Sample 149-900A-83R-1, 0-6 cm, in PPL showing thin alteration rims around individual recrystallized plagioclase crystals. Typically, the alteration rims appear to be chlorite. The wide dimension of the photomicrograph = ~2.7 mm. C. A large strained and twinned plagioclase porphyroclast surrounded by smaller unstrained recrystallized plagioclase crystals in one of the discontinuous oriented plagioclase bands from Sample 149-900A-83R-2, 67-70 cm, in cross-polarized light (XPL). The wide dimension of this photomicrograph is ~0.7 mm. D. A patch of more coarsely recrystallized plagioclase within a plagioclase band from Sample 149-84R-4, 72-76 cm, in XPL showing the abundant twinning and altered crystal boundary regions sometimes observed in the plagioclase bands. The wide dimension of this photomicrograph is ~0.7 mm.