Sealevel history recorded in the Pleistocene carbonate sequence in IODP Hole 310-M0005D, off Tahiti
Version of Record online: 14 OCT 2010
© 2010 Blackwell Publishing Asia Pty Ltd
Volume 19, Issue 4, pages 690–706, December 2010
How to Cite
Iryu, Y., Takahashi, Y., Fujita, K., Camoin, G., Cabioch, G., Matsuda, H., Sato, T., Sugihara, K., Webster, J. M. and Westphal, H. (2010), Sealevel history recorded in the Pleistocene carbonate sequence in IODP Hole 310-M0005D, off Tahiti. Island Arc, 19: 690–706. doi: 10.1111/j.1440-1738.2010.00737.x
- Issue online: 29 NOV 2010
- Version of Record online: 14 OCT 2010
- Received 28 Mar 2010; accepted for publication 18 Jun 2010.
- DP Hunter;
- Hole M0005D;
- IODP Expedition 310 ‘Tahiti Sea Level’;
- sealevel change;
Material cored during the Integrated Ocean Drilling Program (IODP) Expedition 310 ‘Tahiti Sea Level’ revealed that the fossil reef systems around Tahiti are composed of two major stratigraphic sequences: (i) a last deglacial sequence; and (ii) an older Pleistocene sequence. The older Pleistocene carbonate sequence is composed of reef deposits associated with volcaniclastic sediments and was preserved in Hole 310-M0005D drilled off Maraa. Within an approximately 70-m-thick older Pleistocene sequence (33.22–101.93 m below seafloor; 92.85–161.56 m below present sealevel) in this hole, 11 depositional units are defined by lithological changes, sedimentological features, and paleontological characteristics and are numbered sequentially from the top of the hole downward (Subunits P1–P11). Paleowater depths inferred from nongeniculate coralline algae, combined with those determined by using corals and larger foraminifers, suggest two major sealevel rises during the deposition of the older Pleistocene sequence. Of these, the second sealevel rise is associated with an intervening sealevel drop. It is likely that the second sealevel rise corresponds to that during Termination II (TII, the penultimate deglaciation, from Marine Isotope Stages 6 to 5e). Therefore, the intervening sealevel drop can be correlated with that known as the ‘sealevel reversal’ during TII. Because there are limited data on the Pleistocene reef systems in the tropical South Pacific Ocean, this study provides important information about Pleistocene sealevel history, the evolution of coral reef ecosystems, and the responses of coral reefs to Quaternary climate changes.