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Palynological Data from Pliocene Sediments, DSDP Leg 5 Site 32, Northeastern Pacific Ocean

U.S. Geological Survey Open-File Report 92-712
Version 1.0

By R. Farley Fleming


Studies of Pliocene sea-surface temperatures of the North Atlantic Ocean indicate that there were intervals during the Pliocene substantially warmer than modern conditions (Dowsett and Poore, 1990; 1991). One of these intervals occurs at about 3 Ma (Dowsett and Poore, 1991). One goal of PRISM (Pliocene Research, Interpretation, and Synoptic Mapping) is to produce a paleoclimatic map for the world at 3 Ma. As part of this effort, the Pliocene Continental Climates Project within PRISM is attempting to reconstruct terrestrial vegetation patterns along the west coast of North America during the Pliocene, especially at 3 Ma.

This report contains palynological data from DSDP Site 32, located in the northeast Pacific Ocean approximately 380 km off the coast of California. The data reported here consist of a matrix of absolute count data (numbers of specimens) and a matrix of relative abundance data (percentages). These data will be used in the future as a basis for making semi- quantitative and quantitative estimates of climatic parameters during the Pliocene for western North America. Only preliminary interpretations are presented in this report.


  1. README - Text file
  2. Contents - Text file
  3. Open-File Report 92-712 - Text file
  4. Original digital file [Macintosh self-extracting archive encoded using BinHex 4.0]

This work was funded by the U.S. Geological Survey Global Change and Climate History Program and the U.S. Department of Energy (Agreement No. DE-AI21-83MC20422).

This open-file report is available for purchase from:

USGS Information Services, Box 25286,
Federal Center, Denver, CO 80225
telephone: 303-202-4210; e-mail:


This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although all data and software released with this open file have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software.

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Last modified: 03.02.01 (krw)