Figure F10. Close-up photograph that shows the bioturbated claystone of Unit 6 separated from the lower part of Unit 5 crystal vitric tuff by a sharp erosional surface (interval 200-1223A-3X-2, 82-107 cm). Bioturbation decreases with depth. The lower half of the unit is intermittently laminated and only slightly bioturbated. Cross-bedding is present at 101 cm.

Figure F10. Close-up photograph that shows the bioturbated claystone of Unit 6 separated from the lower part of Unit 5 crystal vitric tuff by a sharp erosional surface (interval 200-1223A-3X-2, 82-107 cm). Bioturbation decreases with depth. The lower half of the unit is intermittently laminated and only slightly bioturbated. Cross-bedding is present at 101 cm.