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Oliveira, Dulce; Sanchez Goñi, Maria Fernanda; Naughton, Filipa; Polanco-Martínez, Josué M; Jimenez-Espejo, Francisco J; Grimalt, Joan O; Martrat, Belén; Voelker, Antje H L; Trigo, Ricardo M; Hodell, David A; Abrantes, Fatima F; Desprat, Stéphanie (2025): Deep-sea pollen record of MIS 31 from IODP Site 339-U1385, SW Iberian margin [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.986770

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Published: 2025-11-20 • DOI registered: 2025-11-21

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Abstract:
Pollen-based vegetation reconstruction from IODP Site U1385, drilled on the SW Iberian margin (Expedition 339, 37°34.285′ N, 10°7.562′ W; 2578 m below sea level). The record covers the early Pleistocene interval between 1,100 ka (MIS 32) and 1,050 ka (early MIS 30), including the interglacial MIS 31.
The dataset contains counts and percentages of all identified pollen and spore morphotypes, as well as the main ecological groups: temperate forest (including Mediterranean sclerophylls and all temperate trees and shrubs, excluding Pinus, Cedrus and Cupressaceae), Mediterranean sclerophylls, and semi-desert plants.
Pollen analysis: Samples of 2.5–5 cm³ of sediment (1 cm thick slices) were taken from Holes E and D at 0.02–0.08 m intervals, and at 0.19 m intervals for transitions between holes. Processing followed the standard protocol for marine samples: coarse sieving (150 µm mesh), sequential treatments with cold HCl (10–50 %) and cold HF (45–70 %) to remove carbonates and silicates, a final cold HCl (25 %) treatment to eliminate fluorosilicates, and micro-sieving at 10 µm. Residues were mounted unstained in glycerol to allow rotation of the pollen grains. Pollen analysis of 134 samples was carried out using a Nikon light microscope at ×500 and ×1000 (oil immersion) magnification.
Keyword(s):
Iberian margin; Interglacial; Mediterranean vegetation; MIS 31; pollen analysis
Related to:
Oliveira, Dulce; Maria Fernanda, Sánchez Goñi; Naughton, Filipa; Polanco-Martínez, Josué M; Jimenez-Espejo, Francisco J; Grimalt, Joan O; Martrat, Belén; Voelker, Antje H L; Trigo, Ricardo M; Abrantes, Fatima F; Hodell, David A; Desprat, Stéphanie (2017): Unexpected weak seasonal climate in the western Mediterranean region during MIS 31, a high-insolation forced interglacial. Quaternary Science Reviews, 161, 1-17, https://doi.org/10.1016/j.quascirev.2017.02.013
Funding:
Fundação para a Ciência e Tecnologia (FCT), grant/award no. PTDC/AAC-CLI/100157/2008
Fundação para a Ciência e Tecnologia (FCT), grant/award no. SFRH/BD/9079/2012
Coverage:
Median Latitude: 37.571307 * Median Longitude: -10.126043 * South-bound Latitude: 37.571307 * West-bound Longitude: -10.126153 * North-bound Latitude: 37.571308 * East-bound Longitude: -10.125932
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets

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Datasets listed in this bundled publication

  1. Oliveira, D; Sanchez Goñi, MF; Naughton, F et al. (2025): Raw pollen counts of MIS 31 from IODP Site 339-U1385, SW Iberian margin. https://doi.org/10.1594/PANGAEA.986767
  2. Oliveira, D; Sanchez Goñi, MF; Naughton, F et al. (2025): Relative abundance of pollen from MIS 31 of IODP Site 339-U1385, SW Iberian margin. https://doi.org/10.1594/PANGAEA.986769