5. Data Report: Tropical and Equatorial Calcareous Nannofossil Pleistocene Biostratigraphy, ODP Leg 2021

José-Abel Flores,2 Wuchang Wei,3 Gatsby E. López-Otálvaro,2 Carmen Alvarez,2 and Francisco J. Sierro2


During Ocean Drilling Program (ODP) Leg 202, Pleistocene calcareous nannofossils were recovered from several sites situated between 16°S and 8°N latitude. These sites are under the influence of coastal or equatorial upwelling and offer the opportunity to refine biostratigraphic patterns using alternative events from those used in "standard" zonations (Martini, 1971; Okada and Bukry, 1980).

Differences in the positions of the studied sites (Fig. F1) determine changes in sedimentation rates, which range from ~0.8 to 6 cm/k.y. (Shipboard Scientific Party, 2003). These differences are due to the proximity to the continent and to organic production.

The analyzed sites for this study are Sites 1237, 1238, 1240, 1241, and 1242; geographical situation and water depths are listed in Table T1.

1Flores, J.-A., Wei, W., López-Otálvaro, G.E., Alvarez, C., and Sierro, F.J., 2006. Data report: tropical and equatorial calcareous nannofossil Pleistocene biostratigraphy, ODP Leg 202. In Tiedemann, R., Mix, A.C., Richter, C., and Ruddiman, W.F. (Eds.), Proc. ODP, Sci. Results, 202: College Station, TX (Ocean Drilling Program), 1–11. doi: 10.2973/odp.proc.sr.202.214.2006

2Departamento de Geología, Universidad de Salamanca, 37008 Salamanca, Spain. Correspondence author: flores@usal.es

3Scripps Institution of Oceanography, University of California, San Diego, Geoscience Research Division, La Jolla CA 92093-0244, USA.

Initial receipt: 29 September 2005
Acceptance: 22 May 2006
Web publication: 4 December 2006
Ms 202SR-214