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Late Quaternary Stratigraphy for the Equatorial Pacific Based upon the Diatom Coscinodiscus nodulifer

Lloyd H. Burckle, Nicholas J. Shackleton and Sandra L. Bromble
Micropaleontology
Vol. 27, No. 4 (1981), pp. 352-355
DOI: 10.2307/1485190
Stable URL: http://www.jstor.org/stable/1485190
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Late Quaternary Stratigraphy for the Equatorial Pacific Based upon the Diatom Coscinodiscus nodulifer
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Abstract

Stratigraphy based upon size change in the diatom Coscinodiscus nodulifer A. Schmidt is presented for Late Quaternary sediments of the equatorial Pacific. The size difference is expressed as a simple ratio of <60/>60 μm. Correlation with oxygen isotope curves in the same sediment cores demonstrates that highest ratio values (maximum small forms) occur in Oxygen Isotope Stage 2 (18,000 yr B.P.), while the lowest ratio values (maximum large forms) occur in Oxygen Isotope Sub-stage 5e (125,000 yr B.P.). The use of this stratigraphy will permit us to greatly extend our data base for 18K and 125K age sediments.

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