Only one K/T complete section (Poty Quarry, Recife, Brazil,Fig. 1) has been reported to date from the South American continent (Stinnesbeck, 1989; Alberta0 et al., 1994; Stinnesbeck and Keller, 1994, 1996). The Poty Quarry is similar to northeastern Mexico sections in that both contain typical Tethys planktic foraminiferal assemblages and an 'event' deposit (siliciclastic and breccia deposits) stratigraphically below the K/T boundary (Keller and Stinnesbeck, 1996b)