Maestrichtian calcareous nannofossils of MAud Rise, Weddell Sea ...

• Main Authors: Pospichal, James J, Wise, Sherwood W
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1990
• Subjects: Drilling/drill rig; Leg113; Joides Resolution; Ocean Drilling Program ODP; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.753195; https://doi.pangaea.de/10.1594/PANGAEA.753195

Recovery of an essentially complete upper Maestrichtian/lower Paleocene interval on Maud Rise at 65 °S latitude in the Weddell Sea during Ocean Drilling Program Leg 113 marks the first time that this interval has been cored at these high latitudes. The entire interval was missing at all Falkland Plateau sites drilled during DSDP Legs 36 and 71. Maestrichtian nannofossil assemblages in sediments from Sites 689 and 690, therefore, provide the basis for a needed revision of Maestrichtian coccolith zonation schemes for high southern latitudes. Three zones and two new subzones are described: the uppermost Maestrichtian Nephrolithus frequens Zone, which is subdivided into the Cribrosphaerella daniae Subzone and the underlying N. corystus Subzone, and the Biscutum magnum and B. coronum Zones. A complete calcareous nannofossil biostratigraphy based on the proposed scheme is given including a description of individual species abundance, preservation, and stratigraphic distribution. At this site, the southernmost ... : Supplement to: Pospichal, James J; Wise, Sherwood W (1990): Maestrichtian calcareous nannofossil biostratigraphy of Maud Rise ODP Leg 113 Sites 689 and 690, Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 465-487 ...