Figure F31. Unaltered interiors of olivine phenocrysts (small equant crystals [center]) at the center of a variole defined by radiating, skeletal plagioclase laths in Sample 192-1185A-11R-1 (Piece 4B, 83-86 cm), Unit 5B (field of view = 2.8 mm; plane-polarized light; photomicrograph ID# 1185A_141).