A reexamination of the agglutinated benthic foraminiferal microfaunas found in the Upper Cretaceous red and brown clays of DSDP Hole 603B and ODP Holes 640A and 641A allows us to refine the initial shipboard biostratigraphic interpretation and to propose a fourfold zonation that can be used with some precautions in the oceanic realm. By means of various calibrations, an attempt is also made to integrate this zonation in a worldwide chronostratigraphic framework. The resulting chronologic control permits us to discern large differences in the rhythm of red clay deposition on either side of the North Atlantic Ocean.

For radiolarian distribution ODP Hole 103-641A and DSDP Hole 93-603B see Thurow 1988 dataset: doi:10.1594/PANGAEA.743396

Supplement to: Moullade, Michel; Kuhnt, Wolfgang; Thurow, Juergen W (1988): Agglutinated benthic foraminifers from Upper Cretaceous variegated clays of the North Atlantic Ocean (DSDP Leg 93 and ODP Leg 103). In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 349-377