Tracking paleoecological and isotopic changes through the K-Pg boundary from marine ostracodes: The Poty quarry section, northeastern Brazil

Ostracode assemblages of the Poty quarry, Pernambuco-Paraiba Basin, northeastern Brazil, record an abrupt faunal change near the Cretaceous-Paleogene (K-Pg) boundary. Paleoecological and stable isotope analyses of ostracode carapaces were used to interpret the paleoenvironmental changes that took place from the Late Maastrichtian to the Early Danian. Ostracode distribution demonstrates substantial changes at and around the boundary with the last...