Coccolith species abundances in sediment core GeoB11035-1 from the NW Iberian continental margin for the past 55 ka ...

• Main Authors: Baumann, Karl-Heinz, Stolz, Katharina
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: Assemblages; coccolith abundances; Coccolithophores; North Atlantic; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; AGE; Acanthoica quattrospina; Algirosphaera robusta; Calcidiscus leptoporus ssp. leptoporus; Calcidiscus leptoporus ssp. quadriperforatus; Calciosolenia brasiliensis; Coccolithus pelagicus ssp. braarudii; Coronosphaera mediterranea; Emiliania huxleyi; Florisphaera profunda; Gephyrocapsa ericsonii; Gephyrocapsa muellerae; Gephyrocapsa oceanica; Gladiolithus flabellatus; Hayaster perplexus; Helicosphaera carteri; Helicosphaera wallichii; Oolithotus antillarum; Oolithotus fragilis; Ophiaster hydroideus; Papposphaera spp.; Pontosphaera discopora; Pontosphaera spp.; Reticulofenestra sessilis; Rhabdosphaera clavigera; 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; Coccolithus pelagicus ssp. pelagicus; Plano
• Online Access: https://dx.doi.org/10.1594/pangaea.963235; https://doi.pangaea.de/10.1594/PANGAEA.963235

Coccolithophore assemblage data from sediment core GeoB11035-1 from the NW Iberian continental margin for the past 55 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 to the current warm period covering the last deglaciation.Samples were analysed at 0.5-10 cm intervals and were prepared using a combined dilution/filtering technique as described by Andruleit (1996, doi:10.2307/1485964). Between 50 and 120 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 ...