Figure F11. Latest Cretaceous through earliest Paleogene 13C records from DSDP Site 528 (after D'Hondt et al., 1998). Magnetostrat. = magnetostratigraphy. K/P = Cretaceous/Paleogene boundary. Open symbols = 13C differences between near-surface planktonic foraminifers and benthic foraminifers. Solid symbols = 13C differences between deeper-dwelling planktonic and benthic foraminifers. The benthic foraminifers are Gavelinella and Nuttallides. The planktonic foraminifers are Morozovella angulata (open triangles), Praemurica taurica (open circles), Eoglobigerina eobulloides (solid circles), Rugoglobigerina rotundata (open squares), Pseudotextularia elegans (solid squares), and Heterohelix rajagopalani (solid triangles). A. 13C differences between fine (ff; <25 µm) carbonate and benthic foraminifers (bf). B. 13C differences between planktonic (pf) and benthic foraminifers. C. 13C differences between near-surface planktonic foraminiferal species and the deepest dwelling (thermocline) planktonic species (calculated by subtracting 13C values of the latter from those of the former). The deepest dwelling planktonic species are H. rajagopalani (Cretaceous) and E. eobulloides (Paleogene).
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