Figure F53. Cretaceous/Tertiary boundary on Shatsky Rise in Sections 198-1209A-25H-6, 198-1209C-15H-3, 198-1210A-24H-4, 198-1210B-24H-1, 198-1211A-15H-4, 198-1211B-15H-3, 198-1211C-15H-3, 198-1212A-12H-7, and 198-1212B-11H-7.