The following data paper summarizes diatom biostratigraphic data from sediments drilled in the Costa Rica accretionary wedge during Ocean Drilling Program Leg 170. Quaternary through lower Miocene diatom zones characteristic of the equatorial Pacific region are recognized in the reference section, Site 1039, which was drilled on the downgoing Cocos plate. At Sites 1040-1043, where the recovered silty clay units are primarily wedge and apron sediments that overlie the underthrust sections, diatoms are generally low in abundance, and complete zonation of the cores was not possible above the décollement surface.
White, L.D., 2000. Diatom biostratigraphy of Sites 1039–1043, Costa Rica margin. In Silver, E.A., Kimura, G., and Shipley, T.H. (Eds.), Proc. ODP, Sci. Results, 170 [Online]. Available from World Wide Web: <http://www-odp.tamu.edu/ publications/170_SR/chap_02/chap_02.htm>. [Cited YYYY-MM-DD] Department of Geosciences, San Francisco State University, San Francisco CA 94132, USA. lwhite@sfsu.eduInitial
receipt: 22 April 1999
Acceptance: 12 May 2000
Web publication: 29 September 2000
Ms 170SR-003