PANGAEA_993440 Nannofossil absolute abundances of sediment core GeoB2204-2 Baumann, Karl-Heinz; Heidersdorf, Felix Nannofossil absolute abundances of sediment core GeoB2204-2 2026-04-07 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.993440 Investigator Karl-Heinz Baumann baumann@uni-bremen.de Earth Science DEPTH, sediment/rock Depth, corrected AGE Coccoliths, total Acanthoica spp. Calciosolenia brasiliensis Calciosolenia murrayi Calcidiscus leptoporus Calcidiscus quadriperforatus Ceratolithus cristatus Discosphaera tubifera Emiliania huxleyi Florisphaera profunda Gephyrocapsa ericsonii Gephyrocapsa muellerae Gephyrocapsa oceanica Gephyrocapsa ornata Gladiolithus flabellatus Hayaster perplexus Helicosphaera carteri Oolithotus fragilis Pontosphaera spp. Reticulofenestra sessilis Rhabdosphaera clavigera Rhabdosphaera stylifera Syracosphaera pulchra Syracosphaera spp. Umbilicosphaera hulburtiana Umbilicosphaera sibogae Umbellosphaera irregularis Umbellosphaera tenuis Coccoliths, other geoscientificInformation coccolith abundances equatorial western Atlantic GeoB2204-2 Gravity corer (Kiel type) M23/3 off Brazil Scanning electron microscope (SEM), Zeiss, DSM 940A Meteor (1986) 1993-03-22 1993-03-22 Complete -8.5283333333333 -8.5283333333333 -34.021666666667 -34.021666666667 0.145 m (DEPTH, sediment/rock) 3.645 m (DEPTH, sediment/rock) unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 2130 data points text/tab-separated-values Heidersdorf, Felix (2000): Palökologische Untersuchungen der Coccolithophoridengemeinschaften im Kern GeoB 2204-2 (äquatorialer Westatlantik) für den Zeitraum der letzten 155 ka [thesis]. Unpubl. Diplomarbeit (Master Thesis), University of Bremen, 57 pp

The calcareous nannofossil assemblages from sediment core GeoB2204-2 from the western equatorial region off Brazil were examined to document oceanographic changes in surface waters during the last 155 ka. Coccolith counts (N) were made manually using a Zeiss DSM 940A scanning electron microscope at 3,000x or 5,000x magnification. The recorded fluctuations in the abundance and composition of coccolithophore communities reflect changes in surface water masses. The community is dominated by species from the deeper photic zone, such as Florisphaera profunda and Gladiolithus flabellatus, indicating predominantly oligotrophic conditions during glacial periods. During interglacial periods, higher abundances and larger proportions of species with an affinity for nutrient-rich surface waters indicate the highest abundances. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.993440"!

http://en.wikipedia.org/wiki/Kyr AGE http://www.marinespecies.org/aphia.php?p=taxdetails&id=115082 Pontosphaera spp. http://www.marinespecies.org/aphia.php?p=taxdetails&id=115084 Syracosphaera spp. http://www.marinespecies.org/aphia.php?p=taxdetails&id=115104 Emiliania huxleyi http://www.marinespecies.org/aphia.php?p=taxdetails&id=235923 Calcidiscus leptoporus http://www.marinespecies.org/aphia.php?p=taxdetails&id=235926 Calciosolenia murrayi http://www.marinespecies.org/aphia.php?p=taxdetails&id=235954 Gephyrocapsa ericsonii http://www.marinespecies.org/aphia.php?p=taxdetails&id=235955 Gephyrocapsa oceanica http://www.marinespecies.org/aphia.php?p=taxdetails&id=235979 Syracosphaera pulchra http://www.marinespecies.org/aphia.php?p=taxdetails&id=235983 Umbellosphaera tenuis http://www.marinespecies.org/aphia.php?p=taxdetails&id=235985 Umbilicosphaera sibogae http://www.marinespecies.org/aphia.php?p=taxdetails&id=555889 Calciosolenia brasiliensis http://www.marinespecies.org/aphia.php?p=taxdetails&id=555946 Calcidiscus quadriperforatus http://www.marinespecies.org/aphia.php?p=taxdetails&id=576682 Reticulofenestra sessilis http://www.marinespecies.org/aphia.php?p=taxdetails&id=615435 Helicosphaera carteri http://www.marinespecies.org/aphia.php?p=taxdetails&id=615464 Discosphaera tubifera https://doi.org/10.2312/cr_m23 M23/3 https://en.wikipedia.org/wiki/RV_Meteor_(1986) Meteor (1986) DIF 9.4 2026-04-07 2026-04-07