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Data report: radiolarian occurrences
at IODP Expedition 329 Site U13711

Giuseppe Cortese2 and Carlos A. Alvarez Zarikian3


In this report we present a radiolarian biostratigraphy for the uppermost 108 m recovered during Expedition 329 at Integrated Ocean Drilling Program Site U1371.

This interval of clay-bearing diatom ooze contains well-preserved remains of siliceous microfossils. Below 108 meters below seafloor (mbsf), the sediment lithology changes to zeolitic clay, which does not contain any biosiliceous material.

Twenty-eight radiolarian marker species, used as age-indicative taxa in both middle- and high-latitude radiolarian biozonation schemes, have been recognized at this location and allow age control for the uppermost ~100 m of the cored section, with an estimated age of 8.2 Ma at 101.4 mbsf. These results match well those from a parallel study based on diatom biostratigraphy.

1 Cortese, G., and Alvarez Zarikian, C.A., 2015. Data report: radiolarian occurrences at IODP Expedition 329 Site U1371. In D’Hondt, S., Inagaki, F., Alvarez Zarikian, C.A., and the Expedition 329 Scientists, Proc. IODP, 329: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.329.202.2015

2 GNS Science, PO Box 30 368, Lower Hutt 5040, New Zealand.

3 International Ocean Discovery Program, Texas A&M University, 1000 Discovery Drive, College Station TX 77845, USA.

Initial receipt: 4 February 2014
Acceptance: 30 June 2015
Publication: 2 September 2015
MS 329-202