Jones, Heather; Niederbockstruck, Bryan; Westerhold, Thomas; Röhl, Ursula (2025): Late Paleocene - early Eocene calcareous nannofossil relative abundance count data from IODP Site 378-U1553D (Campbell Plateau, SW Pacific Ocean) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984405
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Published: 2025-09-05 • DOI registered: 2025-10-07
Abstract:
In this dataset, we show the raw relative abundance count data for calcareous nannofossils observed in sediment samples from International Ocean Discovery Program (IODP) Expedition 378, Site U1553, Hole D, located on the Campbell Plateau in the high paleolatitude SW Pacific Ocean. 66 smear slides spanning the late Paleocene - early Eocene (ca. 55.7 to 56.5 Ma) - including the Paleocene-Eocene Thermal Maximum (PETM) and an apparent pre-cursor event - were examined under a polarising light microscope at 1000 to 1600x magnification. At least 300 nannofossil specimens were counted in each sample and identified to species-level whenever possible (genus-level when not), predominantly using the taxonomic concepts collated in the online database Nannotax. Due to the presence of non-classic forms and intermediate morphotypes of species belonging to the Toweius/Prinsius evolutionary lineage, our taxonomic concepts for these taxa differed slightly from those presented on Nannotax and are therefore detailed further in the 'Methods' section of the source text (Jones et al. 2025). Our genus-level relative abundance data were then used to document nannofossil assemblage change during the PETM and pre-cursor event using the previously-published age model and bulk sediment carbon isotope data in Niederbockstruck et al. (2024). After Hellinger data standardisation, the genus-level raw data were also used in a two-way cluster analysis and multiple Principal Components Analyses (PCA)'s to better visualise distinct paleoecological groups as Site U1553 and to compare our data to nannofossil assemblage data from other sites.
Keyword(s):
Assemblages; calcareous nannofossil; Campbell Plateau; coccolith abundances; coccolithophore; early Eocene; hyperthermal event; IODP 378; late Paleocene; Micropaleontology; Paleocene-Eocene Thermal Maximum (PETM); paleoecology; relative abundance; Scientific drilling; Site U1553; SW Pacific; Ypresian
Supplement to:
Jones, Heather; Niederbockstruck, Bryan; Westerhold, Thomas; Röhl, Ursula (2025): Palaeoecological change preceded the Palaeocene-Eocene Thermal Maximum by 200 kyr in the high latitude south-west Pacific Ocean. Communications Earth & Environment, 6, https://doi.org/10.1038/s43247-025-02749-5
Related to:
Niederbockstruck, Bryan; Jones, Heather; Yasukawa, K; Raffi, Isabella; Tanaka, E; Westerhold, Thomas; Ikehara, Minoru; Röhl, Ursula (2024): Late Paleocene to early Eocene stable isotope records and calcareous nannofossil datums at IODP Site U1553 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.963554
References:
Niederbockstruck, Bryan; Jones, H L; Yasukawa, K; Raffi, Isabella; Tanaka, E; Westerhold, Thomas; Ikehara, Minoru; Röhl, Ursula (2024): Apparent Diachroneity of Calcareous Nannofossil Datums During the Early Eocene in the High-Latitude South Pacific Ocean. Paleoceanography and Paleoclimatology, 39(4), e2023PA004801, https://doi.org/10.1029/2023PA004801
Project(s):
The Ocean Floor - Earth's Uncharted Interface (ClusterOceanFloor)
Funding:
German Research Foundation (DFG), grant/award no. 390741603: EXC 2077: The Ocean Floor – Earth's Uncharted Interface
Coverage:
Latitude: -52.224000 * Longitude: 166.191300
Date/Time Start: 2020-01-21T14:30:00 * Date/Time End: 2020-01-24T12:55:00
Minimum DEPTH, sediment/rock: 446.405 m * Maximum DEPTH, sediment/rock: 453.205 m
Event(s):
378-U1553D * Latitude: -52.224000 * Longitude: 166.191300 * Date/Time Start: 2020-01-21T14:30:00 * Date/Time End: 2020-01-24T12:55:00 * Elevation: -1221.6 m * Location: South Pacific Ocean * Campaign: EXP378 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: Time on hole (days): 2.93, Seafloor depth DRF (m): 1233, Seafloor depth est. method: OFFSET, Rig floor to sea level (m): 11.39, Penetration DSF (m): 584.3, Cored interval (m): 184.9, Recovered length (m): 97.95, Recovery (%): 52.97, Drilled interval (m): 399.4, Drilled interval (no.): 1, Total cores (no.): 19, RCB cores (no.): 19
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
4686 data points
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