Coccolith species abundances in ODP Site 162-980 from the subpolar North Atlantic Ocean for the past 25 ka ...

• Main Author: Baumann, Karl-Heinz
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: Assemblages; coccolith abundances; Coccolithophores; North Atlantic; ODP; DEPTH, sediment/rock; Sample code/label; AGE; Acanthoica quattrospina; Algirosphaera robusta; Calcidiscus leptoporus ssp. leptoporus; Calcidiscus leptoporus ssp. quadriperforatus; Calciosolenia brasiliensis; Coccolithus pelagicus ssp. pelagicus; Coccolithus pelagicus ssp. braarudii; Coronosphaera mediterranea; Emiliania huxleyi; Florisphaera profunda; Gladiolithus flabellatus; Gephyrocapsa ericsonii; Gephyrocapsa muellerae; Gephyrocapsa oceanica; Hayaster perplexus; Helicosphaera carteri; Helicosphaera wallichii; Oolithotus antillarum; Oolithotus fragilis; Ophiaster hydroideus; Papposphaera spp.; Pontosphaera discopora; Pontosphaera spp.; Rhabdosphaera clavigera; Reticulofenestra sessilis; Syracosphaera pulchra; Syracosphaera sp.; Umbilicosphaera foliosa; Umbilicosphaera sibogae; Umbilicosphaera hulburtiana; Umbellosphaera tenuis; Umbellosphaera irregularis; Umbellosphaera sp.; Coccoliths indeterminata; Coccoliths, reworked; Sample mass; Split factor; Magnification; Frame width; Transect length; Scanned area; Filter, area; Plano
• Online Access: https://dx.doi.org/10.1594/pangaea.963229; https://doi.pangaea.de/10.1594/PANGAEA.963229

Coccolithophore assemblage data from ODP Site 162-980 from the subpolar North Atlantic ocean spanning the past 25 ka. The assemblage data were used to assess changes in biodiversity and assemblage composition during the past 24 ka, i.e., from the Last Glacial Maximum (LGM) to the current warm period covering the last deglaciation.Samples were analysed at 1-30 cm intervals and were prepared using a combined dilution/filtering technique as described by Andruleit (1996, doi:10.2307/1485964). Between 50 and 150 mg of dry bulk sediment was brought into suspension using demineralized water buffered with ammonia (pH ~ 8.5-9). The suspension was ultrasonicated for 15 to 30 s, split (split factor = 100) using a rotary splitter and filtered onto polycarbonate membrane filters (0.4 µm pore size) using a vacuum pump. Samples were dried at 40°C for 24 h before ~1x1 cm filter aliquots were mounted on an aluminium stub that was prepared with electroconductive, self-adhesive, carbon-based discs (PLANO Leit tabs). The ...