de.pangaea.dataset993440 und dataset PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact 2026-04-07T09:28:24Z https://doi.pangaea.de/10.1594/PANGAEA.993440 2026-04-07T09:28:23 publication Baumann, Karl-Heinz

baumann@uni-bremen.de

https://orcid.org/0000-0003-2109-5179 information author Heidersdorf, Felix author PANGAEA

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https://www.pangaea.de/ information publisher tableDigital 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. completed Baumann, Karl-Heinz

baumann@uni-bremen.de

https://orcid.org/0000-0003-2109-5179 information principalInvestigator coccolith abundances equatorial western Atlantic off Brazil theme 1995-01-01 creation PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation -34.021666666667 -34.021666666667 -8.5283333333333 -8.5283333333333 1993-03-22T00:00:00 1993-03-22T00:00:00 0.145 3.645 DEPTH, sediment/rock physicalMeasurement m m Depth, corrected physicalMeasurement m m AGE physicalMeasurement ka BP ka BP Coccoliths, total physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Acanthoica spp. physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Calciosolenia brasiliensis physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Calciosolenia murrayi physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Calcidiscus leptoporus physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Calcidiscus quadriperforatus physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Ceratolithus cristatus physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Discosphaera tubifera physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Emiliania huxleyi physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Florisphaera profunda physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Gephyrocapsa ericsonii physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Gephyrocapsa muellerae physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Gephyrocapsa oceanica physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Gephyrocapsa ornata physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Gladiolithus flabellatus physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Hayaster perplexus physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Helicosphaera carteri physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Oolithotus fragilis physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Pontosphaera spp. physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Reticulofenestra sessilis physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Rhabdosphaera clavigera physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Rhabdosphaera stylifera physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Syracosphaera pulchra physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Syracosphaera spp. physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Umbilicosphaera hulburtiana physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Umbilicosphaera sibogae physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Umbellosphaera irregularis physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Umbellosphaera tenuis physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g Coccoliths, other physicalMeasurement Scanning electron microscope (SEM), Zeiss, DSM 940A 10**6 #/g 10**6 #/g text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.993440?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: GeoB2204-2 * LATITUDE: -8.528333 * LONGITUDE: -34.021667 * DATE/TIME: 1993-03-22T00:00:00 * ELEVATION: -2072.0 m * Recovery: 8.97 m * LOCATION: Brazil Basin * CAMPAIGN: M23/3 * BASIS: Meteor (1986) * METHOD/DEVICE: Gravity corer (Kiel type) weight on top of sediment 1993-03-22T00:00:00 Related to 2000-01-01 publication Heidersdorf, Felix author documentHardcopy Unpubl. Diplomarbeit (Master Thesis), University of Bremen 57 pp