Calcareous nannofossil biostratigraphic terms of ODP Site 171-1053


This dataset contains the semiquantitative data relative to the calcareous nannofossil assemblages from a subset of 26 samples from ODP Site 1053 core 8, Section 5. Samples span 74.54 to 75.20 m in composite depth, with a sample resolution that ranges from 1 to 10 cm. Data was collected From January to April 2023 and span a 1 M.y. long late Eocene Interval, Priabonian in age, that corresponds to the CNE19 nannofossil zone of the Priabonian (ca. 36 Ma; Agnini et al., 2014; Raffi et al., 2016). The samples from which the calcareous nannofossil assemblages were obtained were collected from ODP Site 1053, in the Blake Nose, NW Atlantic Ocean. This dataset has a regional resolution. Following previous results on bulk carbon and Oxygen stable isotopes, data was collected to further investigate the Blake Nose's regional paleoceanography during the Late Eocene. Nannofossil smear slides were prepared and examined using an Olympus BX51 polarizing microscope at the MARUM – Center for Marine Environmental Sciences (University of Bremen). Biostratigraphic analyses were conducted at low (600x) magnification along two long transects of each slide to ensure that rare, biostratigraphically significant taxa were not overlooked. For qualitative assemblage analyses, ten fields of view (FOV) from a representative area of each slide were examined at higher (1000x) magnification. The individual abundance of each species within a sample was then estimated as follows:C: At least one specimen present in every FOVFr: One specimen present in 6 to 9 of the FOVF: One specimen present in 2 to 5 of the FOVR: Specimen only present in one of the FOVVR: 5 or less specimens observed within the whole sample (used for the taxa that were only observed while conducting biostratigraphic analyses).

Related Identifier IsPartOf
Metadata Access
Creator De Entrambasaguas, Julia (ORCID: 0000-0002-8033-892X); Westerhold, Thomas ORCID logo; Jones, Heather; Alegret, Laia
Publisher PANGAEA
Publication Year 2024
Funding Reference German Research Foundation Crossref Funder ID 320221997 New high-resolution compilation of benthic stable isotope data spanning 34 to 75 Ma - for both Atlantic and Pacific Ocean; German Research Foundation Crossref Funder ID 390741603 EXC 2077: The Ocean Floor – Earth's Uncharted Interface; Ministry of Economy, Industry and Competitiveness Crossref Funder ID PID2019-105537RB-I00 MCIN/AEI/ 10.13039/501100011033 and ERDF A way of making Europe
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints);
OpenAccess false
Resource Type Dataset
Format text/tab-separated-values
Size 1202 data points
Discipline Earth System Research
Spatial Coverage (-76.524 LON, 29.992 LAT); Carolina Slope, North Atlantic Ocean
Temporal Coverage Begin 1997-02-06T20:30:00Z
Temporal Coverage End 1997-02-07T18:20:00Z