Figure F52. A partly glassy, sparsely olivine-phyric basalt exhibiting a variolitic texture around olivine phenocrysts in Sample 192-1183A-55R-2 (Piece 1A, 15-17 cm), Unit 3B (field of view = 1.4 mm; plane-polarized light; photomicrograph ID# 1183A

Figure F52. A partly glassy, sparsely olivine-phyric basalt exhibiting a variolitic texture around olivine phenocrysts in Sample 192-1183A-55R-2 (Piece 1A, 15-17 cm), Unit 3B (field of view = 1.4 mm; plane-polarized light; photomicrograph ID# 1183A_020).