(Table 1) Ostracode assemblage parameters in sediments of ODP Hole 113-689 ...

• Main Authors: Steineck, P Lewis, Thomas, E
• Format: Dataset
• Language: English
• Published: PANGAEA 1996
• Subjects: DEPTH, sediment/rock; Sample code/label; Sample, optional label/labor no; Sample volume; Age model; Infauna; Diversity, simple; Ostracoda; Composite Core; DSDP/ODP/IODP sample designation; Leg113; Joides Resolution; Ocean Drilling Program ODP; Maud Rise; Shackleton; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.712029; https://doi.pangaea.de/10.1594/PANGAEA.712029

During the late Paleocene thermal maximum (ca. 55.50 Ma) mid-bathyal ostracodes at Maud Rise in the Southern Ocean (Ocean Drilling Program Site 689) underwent a sudden, dramatic turnover synchronous with a global extinction in deep-sea benthic foraminifers and with large-scale, short-lived negative excursions in the stable isotope record of foraminiferal calcite. A previously stable and long-lived ostracode assemblage, dominated by heavily calcified, chiefly epifaunal taxa, was replaced within ~10 k.y. by a taxonomically novel association of small, thin-walled opportunistic and generalist forms that persisted for ~25-40 k.y. Thereafter, ostracode faunas recovered and common bathyal forms returned, although species were smaller and/or less-heavily calcified than before the turnover. The complex fabric of change in ostracode shell morphology and assemblage composition and structure reflects both long-term and sudden perturbations in seawater chemistry at this site. Ostracode data are in agreement with the ... : Age model after Thomas et al. (1990; http://www-odp.tamu.edu/publications/113_SR/VOLUME/CHAPTERS/sr113_51.pdf), as adapted by Thomas and Shackleton (1996; DOI: 10.1144/GSL.SP.1996.101.01.20) to the stratigraphic interpretation of Aubry et al. (1996; DOI: 10.1144/GSL.SP.1996.101.01.18). ...