Figure F29. Photomicrograph of crystal vitric tuff (Sample 200-1223A-3X-1, 112-114 cm; Unit 5; plane-polarized light). Pale yellow = glassy shards, colorless minerals = olivine and plagioclase, green granule = chlorite, black to dark brown = vitric fragment, holocrystalline fragments = lithic fragments, brownish rim bordering the glassy shards = clay minerals. Vesicularity = ~20%.

Figure F29. Photomicrograph of crystal vitric tuff (Sample 200-1223A-3X-1, 112-114 cm; Unit 5; plane-polarized light). Pale yellow = glassy shards, colorless minerals = olivine and plagioclase, green granule = chlorite, black to dark brown = vitric fragment, holocrystalline fragments = lithic fragments, brownish rim bordering the glassy shards = clay minerals. Vesicularity = ~20%.