Figure F14. The lowest zeolite-rich band defines the contact between lithologic Units II and III (interval 192-1183A-39R-4, 7-25 cm). The Cretaceous/Paleogene boundary is ~70 cm below this diagenetically concentrated, altered volcanic ash.

Figure F14. The lowest zeolite-rich band defines the contact between lithologic Units II and III (interval 192-1183A-39R-4, 7-25 cm). The Cretaceous/Paleogene boundary is ~70 cm below this diagenetically concentrated, altered volcanic ash.