Figure F10. Digital images of the P/E boundary sediments recovered at Sites 1220 and 1221 (from Shipboard Scientific Party, 2002). Lower Eocene calcareous chalks grade downcore into multicolored clay-rich lithologies. The black layer in the center of the section is a manganese oxide–rich unit. The last occurrence (LO) of Paleocene benthic foraminiferal fauna is recorded at the base of the brown clay, and the first occurrence (FO) of Eocene assemblages is at the top of the dark brown clay. Calcareous fossils are barren to poorly preserved in the multicolored clay layers, where carbonates are very low to absent.