Figure F61. Color close-up photograph of interval 183-1141A-23R-2 (Piece 1, 98-120 cm). Network of calcite + quartz veins in Unit 6 with a dark green alteration halo adjacent to vein representing highly altered basalt. Light green ("bleached") and red alteration halos are found outside the dark green halo and the less altered wall rock. Brecciated wall rock in veins is also visible.