Figure F23. Close-up photograph of a prominent spheroidal texture defined by abundant isolated and coalesced white concentric domains within a dark groundmass. It is inferred that this texture represents a remnant volcanic feature related to high-temperature devitrification processes in Unit 31 (interval 193-1188F-6Z-1, 45-47 cm).

Figure F23. Close-up photograph of a prominent spheroidal texture defined by abundant isolated and coalesced white concentric domains within a dark groundmass. It is inferred that this texture represents a remnant volcanic feature related to high-temperature devitrification processes in Unit 31 (interval 193-1188F-6Z-1, 45-47 cm).