Figure F17. Photomicrographs of diabase showing intersertal to subophitic texture, with light plagioclase, clinopyroxene, and olivine crystals and (dark altered) glassy groundmass (Sample 198-1213B-28R-3, 143-145 cm). The upper view is in plane-polarized light, and the lower view is with nicols crossed.

Figure F17. Photomicrographs of diabase showing intersertal to subophitic texture, with light plagioclase, clinopyroxene, and olivine crystals and (dark altered) glassy groundmass (Sample 198-1213B-28R-3, 143-145 cm). The upper view is in plane-polarized light, and the lower view is with nicols crossed.