Distribution of calcareous nannofossils in Cretaceous to Paleogene sediments of ODP Hole 208-1262C at Walvis Ridge, South Atlantic Ocean (Appendix A) ...

• Main Authors: Bernaola, Gilen, Monechi, Simonetta
• Format: Dataset
• Language: English
• Published: PANGAEA 2007
• Subjects: DEPTH, sediment/rock; Sample code/label; Nannofossils; Acuturris scotus; Ahmuellerella regularis; Arkhangelskiella cymbiformis; Broinsonia spp.; Calculites spp.; Ceratolithoides aculeus; Ceratolithoides kamptneri; Chiastozygus amphipons; Chiastozygus fessus; Chiastozygus litterarius; Corollithion exiguum; Corollithion kennedyi; Corollithion madagaskarensis; Cretarhabdus conicus; Cribrocorona gallica; Cribrosphaerella ehrenbergii; Cylindralithus cf. nudus; Cylindralithus serratus; Discorhabdus ignotus; Eiffellithus eximius; Eiffellithus gorkae; Eiffellithus parallelus; Eiffellithus turriseiffelii; Kamptnerius magnificus; Lithraphidites carniolensis; Lithraphidites praequadratus; Lithraphidites quadratus; Loxolithus armilla; Manivitella pemmatoidea; Microrhabdulus attenuatus; Microrhabdulus belgicus; Microrhabdulus cf. undosus; Microrhabdulus decoratus; Micula concava; Micula decussata; Micula murus; Micula prinsii; Micula spp.; Micula swastica; Nephrolithus frequens; Prediscosphaera spp.; Prediscosphaera cretacea; Prediscosphaera grandis; Prediscosphaera honjoi; Prediscosphaera intercisa; Prediscosphaera majungae; Prediscosphaera spinosa; South Atlantic Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.693626; https://doi.pangaea.de/10.1594/PANGAEA.693626

Site 1262 in the South Atlantic Ocean has provided a stratigraphically continuous deep Cretaceous/Paleogene boundary sequence. High resolution calcareous nannofossil quantitative analyses were carried out across the K/P boundary, and provided a remarkable record of the abrupt and catastrophic extinction. The calcareous nannofossil assemblages are abundant and well preserved allowing to obtain a precise bioevent sequence and to document in detail the survivors and victims and the subsequent recovery across the K/P boundary.Late Maastrichtian diversity and absolute abundance is high and no decrease towards the boundary has been observed. The relative abundance of Cretaceous species does not suffer important changes during the latest Maastrichtian. However, the increase in abundance of cool-water taxa, paralleled with a decrease of warm water taxa in the uppermost 2 cm of the Maastrichtian, revealed a pulse of surface water cooling.The K/P boundary is marked by an important decrease in calcareous nannofossil ... : <1 = present ...