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Ocean Drilling Program Leg 120 Sites 747, and 750, and Hole 748C on the southern Kerguelen Plateau contain Cretaceous marine sections that span the upper Cenomanian-upper Maestrichtian. The most complete sections recovered from Sites 747 and 750 are Campanian and Maestrichtian. Older sections are fragmentary and only spot ages and paleotemperature indications can be determined. The section in Hole 748C lacks age-diagnostic planktonic species, and was deposited under very shallow marine conditions. Water temperature was temperate (perhaps in the Transitional Faunal Province in Sliter's sense) with keeled globotruncanids present through the Cenomanian-Santonian. Faunas in the upper Campanian and into the Abathomphalus mayaroensis Zone of the upper Maestrichtian, may be placed in the Austral Faunal Province. In the upper part of the A. mayaroensis Zone, temperatures were significantly higher with quite diverse globotruncanids and more complex biserial taxa at the location of Site 750. Waters at Site 750, to the south and east of Site 747, may have been warmer during the Upper Cretaceous, reflecting the presence of a counterclockwise gyre east of the Kerguelen Plateau.

Upper Cretaceous Planktonic Foraminifers and Biostratigraphy, Leg 120, Southern Kerguelen Plateau