Well preserved assemblages of calcareous nannofossil are found in four horizons in the Late Albian to Mid Cenomanian Wasia Group and three horizons in the Late Campanian to Early Maastrichtian upper Aruma Group, onshore Kuwait. They are analysed from core samples that were collected every four feet from twelve wells. Eleven zones and subzones that are correlated to the Tethyan Cretaceous Nannofossil Biostratigraphy, NC of Roth (1978, 1983) and UC of Burnet et al., (1998) are identified for subdividing the sediments. These subdivisions, in stratigraphic ascending order, are NC9B, Nannoconus fragilis, Zeugrhabdotus erectus, Corollithion kennedyi, Gartnerago chiasta, UC1c-UC2a, UC2b-UC3a, UC14-15, UC16, UC17 and UC18 Zones/Subzones. Five 3rd order and one (?) 4th order maximum flooding intervals of the Arabian Plate (Sharland et al., 2001): K110, K120, K130, K170, K180 and (?) K175 are recognised and one 4th order MFS is proposed.


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