Calcareous nannofossils of ODP Hole 177-1090D ...

• Main Authors: Maiorano, Patrizia, Marino, Maria, Flores, José-Abel
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2009
• Subjects: Drilling/drill rig; Leg177; Joides Resolution; Ocean Drilling Program ODP; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.773857; https://doi.pangaea.de/10.1594/PANGAEA.773857

Calcareous nannofossil assemblages have been investigated at Ocean Drilling Program (ODP) Site 1090 located in the modern Subantarctic Zone, through the Pleistocene Marine Isotope Stages (MIS) 34-29, between 1150 and 1000 ka. A previously developed age model and new biostratigraphic constraints provide a reliable chronological framework for the studied section and allow correlation with other records. Two relevant biostratigraphic events have been identified: the First Common Occurrence of Reticulofenestra asanoi, distinctly correlated to MIS 31-32; the re-entry of medium Gephyrocapsa at MIS 29, unexpectedly similar to what was observed at low latitude sites.The composition of the calcareous nannofossil assemblage permits identification of three intervals (I-III). Intervals I and III, correlated to MIS 34-32 and MIS 30-29 respectively, are identified as characteristic of water masses located south of the Subtropical Front and reflecting the southern border of Subantarctic Zone, at the transition with the ... : Supplement to: Maiorano, Patrizia; Marino, Maria; Flores, José-Abel (2009): The warm interglacial Marine Isotope Stage 31: Evidences from the calcareous nannofossil assemblages at Site 1090 (Southern Ocean). Marine Micropaleontology, 71(3-4), 166-175 ...