Figure F48. Photomicrographs of deformed and decorated olivine crystals in the upper crystal vitric tuff (Unit 5). A. Olivine decorated with exsolved swirls of iron oxide (Sample 200-1223A-3X-1, 112-114 cm; plane-polarized light). B. Kink-banded olivine fragments (Sample 200-1223A-3X-2, 71-73 cm; crossed polars). C, D. Olivine decorated with swirls of iron oxides divided into parallel bands with differential staining (Sample 200-1223A-3X-2, 71-73 cm; plane-polarized light and crossed polars, respectively). The stain bands are not kink bands because they have uniform birefringence, as seen in D. E, F. Another olivine decorated with swirls of iron oxides divided into parallel bands with differential staining (Sample 200-1223A-3X-2, 71-73 cm; plane-polarized light and crossed polars, respectively). In this olivine, the cuspate stacking of the swirls coincides with the bands. In F, the bands also have uniform birefringence.

Figure F48. Photomicrographs of deformed and decorated olivine crystals in the upper crystal vitric tuff (Unit 5). A. Olivine decorated with exsolved swirls of iron oxide (Sample 200-1223A-3X-1, 112-114 cm; plane-polarized light). B. Kink-banded olivine fragments (Sample 200-1223A-3X-2, 71-73 cm; crossed polars). C, D. Olivine decorated with swirls of iron oxides divided into parallel bands with differential staining (Sample 200-1223A-3X-2, 71-73 cm; plane-polarized light and crossed polars, respectively). The stain bands are not kink bands because they have uniform birefringence, as seen in D. E, F. Another olivine decorated with swirls of iron oxides divided into parallel bands with differential staining (Sample 200-1223A-3X-2, 71-73 cm; plane-polarized light and crossed polars, respectively). In this olivine, the cuspate stacking of the swirls coincides with the bands. In F, the bands also have uniform birefringence.