Stable isotope ratios, iridium concentrations, and mineralogy of sediments at and around the Cretaceous/Tertiary boundary at ODP Hole 119-738C, supplement to: Thierstein, Hans R; Asaro, Frank; Ehrmann, Werner; Huber, Brian T; Michel, Helen V; Sakai, Hideo; Schmitz, Birger (1991): The Cretaceous/Tertiary Boundary at Site 738, southern Kerguelen Plateau. In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 849-867

Hans R Thierstein, Frank Asaro, Werner Ehrmann, Brian T Huber, Helen V Michel, Hideo Sakai & Birger Schmitz
High-resolution stratigraphic evidence of an apparently complete carbonate-rich Cretaceous/Tertiary boundary interval in Section 119-738C-20R-5 from the southern Kerguelen Plateau is summarized and interpreted. The change of the calcareous nannoflora and of the planktonic foraminifers is spread over a laminated interval of about 15 cm thickness. The base of this laminated interval lies in uppermost Maestrichtian chalks, 2 cm below a distinct 2-mm-thick "gray clay" layer, which shows the highest iridium enrichment (18 ppb) measured in...
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