Marino, Maria; Rodrigues, Teresa; Quivelli, Ornella; Girone, Angela; Maiorano, Patrizia; Bassinot, Franck (2025): Calcareous nannofossils in the Western Mediterranean during the Early-Middle Pleistocene transition [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.982552, In: Marino, M et al. (2025): Paleoproductivity proxies and alkenone precursors in the Western Mediterranean during the Early-Middle Pleistocene transition [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.982519
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2025-05-27 • DOI registered: 2025-06-26
Abstract:
Taxonomic analyses of coccolithophore assemblages have been carried out on sediments from Ocean Drilling Program Site 975 in the Algero-Balearic basin (38°53.8′ N, 4°30.6′ E), through late marine isotope stage (MIS) 20-19 (from 800 to 756 thousand years ago). Quantitative analyses on coccolithophores were performed at the Dipartimento di Scienze della Terra e Geoambientali, Bari University (Italy), using a polarized light microscope at 1000 X magnification, and abundances were determined by counting at least 500 coccoliths of all sizes. Nannofossil dissolution index (DI) has been calculated as follows: small gephyrocapsids/(small gephyrocapsids + Calcidiscus leptoporus).
Keyword(s):
Related to:
Marino, Maria; Rodrigues, Teresa; Quivelli, Ornella; Girone, Angela; Maiorano, Patrizia; Bassinot, Franck (2022): Paleoproductivity proxies and alkenone precursors in the Western Mediterranean during the Early-Middle Pleistocene transition. Palaeogeography, Palaeoclimatology, Palaeoecology, 601, 111104, https://doi.org/10.1016/j.palaeo.2022.111104
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 38.896633 * Longitude: 4.509883
Date/Time Start: 1995-05-14T00:00:00 * Date/Time End: 1995-08-19T00:00:00
Minimum Elevation: -2415.8 m * Maximum Elevation: -2415.8 m
Event(s):
161-975 * Latitude: 38.896633 * Longitude: 4.509883 * Date/Time Start: 1995-05-14T00:00:00 * Date/Time End: 1995-08-19T00:00:00 * Elevation: -2415.8 m * Penetration: 790.2 m * Recovery: 773.6 m * Location: Western Basin * Campaign: Leg161 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 85 cores; 790.2 m cored; 0 m drilled; 97.9% recovery
Comment:
This dataset was funded by a Geoscience PhD scholarship from University of Bari, Italy.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Depth, composite | Depth comp | mcd | Compensed depth | ||
| 2 | Dissolution index | DX | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | Nannofossil dissolution index | |
| 3 | Coccoliths, total | Cocco | 106 #/g | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | |
| 4 | Accumulation rate, coccoliths | Acc rate cocco | 106 #/cm2/ka | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | Total |
| 5 | Accumulation rate, Gephyrocapsa spp. | Gephyrocapsa spp. acc rate | 106 #/cm2/ka | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | |
| 6 | Accumulation rate, Gephyrocapsa spp. | Gephyrocapsa spp. acc rate | 106 #/cm2/ka | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | Gephyrocapsa open central area |
| 7 | Accumulation rate, Gephyrocapsa caribbeanica | G. caribbeanica acc rate | 106 #/cm2/ka | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | |
| 8 | Gephyrocapsa spp. | Gephyrocapsa spp. | % | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | Total |
| 9 | Gephyrocapsa spp. | Gephyrocapsa spp. | % | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | Open central area, >3µm |
| 10 | Gephyrocapsa spp. | Gephyrocapsa spp. | % | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | Open central area, <3µm |
| 11 | Gephyrocapsa caribbeanica | G. caribbeanica | % | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | Total |
| 12 | Gephyrocapsa caribbeanica | G. caribbeanica | % | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | >3µm |
| 13 | Gephyrocapsa omega | G. omega | % | Quivelli, Ornella | Polarized light microscope [1000 × magnification] | |
| 14 | Pseudoemiliania lacunosa | P. lacunosa | % | Quivelli, Ornella | Polarized light microscope [1000 × magnification] |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1988 data points