Figure F67. Interval 192-1185B-17R-1, 18-51 cm, showing complex halos developed near smectite (±calcite) veins in the lower alteration zone. Olive halos are developed near veins and in the hyaloclastite at the top of the piece. Broader dusky green halos extend several centimeters beyond the olive halos and display sharp boundaries with the gray basalt interiors. The dusky green halos and gray basalt interiors both contain celadonite in the groundmass and replacing olivine phenocrysts.

Figure F67. Interval 192-1185B-17R-1, 18-51 cm, showing complex halos developed near smectite (±calcite) veins in the lower alteration zone. Olive halos are developed near veins and in the hyaloclastite at the top of the piece. Broader dusky green halos extend several centimeters beyond the olive halos and display sharp boundaries with the gray basalt interiors. The dusky green halos and gray basalt interiors both contain celadonite in the groundmass and replacing olivine phenocrysts.