Figure F19. Close-up photograph showing volcaniclastic silty claystone of Unit 12 with anhydrite-filled vugs (interval 200-1223A-6X-3, 95-140 cm). The concentration of filled vugs increases with depth in the unit. There is a sharp contact between Subunit 11B and Unit 12.

Figure F19. Close-up photograph showing volcaniclastic silty claystone of Unit 12 with anhydrite-filled vugs (interval 200-1223A-6X-3, 95-140 cm). The concentration of filled vugs increases with depth in the unit. There is a sharp contact between Subunit 11B and Unit 12.