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MacLeod, Kenneth G; Huber, Brian T; Pletsch, Thomas; Röhl, Ursula; Kucera, Michal (2015): Maastrichtian foraminifera and element analysis of ODP Hole 171-1050C [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.847737, Supplement to: MacLeod, KG et al. (2001): Maastrichtian foraminiferal and paleoceanographic changes on Milankovitch time scales. Paleoceanography, 16(2), 133-154, https://doi.org/10.1029/2000PA000514

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Abstract:
Milankovitch-scale alternations in Maastrichtian hemipelagic strata from Ocean Drilling Program Hole 1050C (Blake Nose) provide a natural experiment of paleoceanography and foraminiferal paleoecology in a tropical/subtropical greenhouse ocean. Cycles are 30-50 cm thick and thought to reflect the ~21 kyr precessional cycle. High planktic d18O values are correlated with high planktic but low benthic d13C values, indicating that cooler and/or more saline surface waters were associated with higher productivity. High-productivity intervals are also characterized by high Ca concentrations; enrichment in feldspar and kaolinite; and high relative abundance of Heterohelix spp., Globigerinelloides spp., and Laeviheterohelix glabrans. Conversely, low-productivity intervals have low planktic d18O values; high Fe and Ti concentrations; enrichment in quartz, illite, and chlorite; and relative increases in Globotruncana spp. and Pseudoguembelina spp. Potential forcing mechanisms for observed covariation include cyclic variation in water column stratification, variation in continental nutrient fluxes, and changes in the intensity of upwelling.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 30.099910 * Longitude: -76.234970
Date/Time Start: 1997-02-08T19:30:00 * Date/Time End: 1997-02-08T19:30:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. MacLeod, KG; Huber, BT; Pletsch, T et al. (2015): (Table 5) Correspondence analysis for Maastrichtian foraminifera of ODP Hole 171-1050C, sample scores. https://doi.org/10.1594/PANGAEA.847732
  2. MacLeod, KG; Huber, BT; Pletsch, T et al. (2015): (Table 1) Element abundances in the Maastrichtian sequence of ODP Hole 171-1050C. https://doi.org/10.1594/PANGAEA.847734
  3. MacLeod, KG; Huber, BT; Pletsch, T et al. (2015): (Table 2) Maastrichtian foraminifera of ODP Hole 171-1050C. https://doi.org/10.1594/PANGAEA.847729
  4. MacLeod, KG; Huber, BT; Pletsch, T et al. (2015): (Table 2) Stable isotope composition of Maastrichtian foraminifera of ODP Hole 171-1050C. https://doi.org/10.1594/PANGAEA.847736
  5. MacLeod, KG; Huber, BT; Pletsch, T et al. (2015): (Table 5) Correspondence analysis for Maastrichtian foraminifera of ODP Hole not_given, variable loadings. https://doi.org/10.1594/PANGAEA.847733