Calcareous nannofossils were analyzed using simple smear slides and standard light-microscope techniques (Bown and Young, 1998). Samples were analyzed semiquantitatively; abundance and preservation categories are given in Table T1. Biostratigraphy is described with reference to both the global Upper Cretaceous UC biozonation of Burnett (1998) and the older CC biozonation of Sissingh (1977, 1978), as modified by Perch-Nielsen (1979, 1983, 1985).