Figure F6. Close-up photographs of representative lithologies from Subunits IIIA and IIIB and the K/T boundary. A. Typical fine-scaled mottled structure and colors (light greenish gray and reddish brown) of Subunit IIIA (interval 207-1259A-47R-1, 90–110 cm). Note the light greenish gray halos around discrete burrows in the reddish brown sediments. B. Apparently complete K/T boundary interval including a graded 1.9-cm-thick ejecta layer (interval 207-1259B-13R-1, 33–53 cm). C. Mottled nannofossil chalk of late Maastrichtian age (interval 207-1259A-47R-4, 90–110 cm).