Figure F27. Photomicrograph of olivine phenocrysts and tiny octahedral crystals of chrome spinel in a quenched pillow margin (Sample 192-1185A-8R-1 [Piece 2, 15-18 cm]). The groundmass consists of glass with dendritic microlites (plane-polarized light; photomicrograph ID# 1185A

Figure F27. Photomicrograph of olivine phenocrysts and tiny octahedral crystals of chrome spinel in a quenched pillow margin (Sample 192-1185A-8R-1 [Piece 2, 15-18 cm]). The groundmass consists of glass with dendritic microlites (plane-polarized light; photomicrograph ID# 1185A_118).