Title

Caribbean chronostratigraphy refined with U-Pb dating of a Miocene coral

Document Type

Article

Peer Reviewed

1

Publication Date

2-1-2008

Journal/Book/Conference Title

Geology

DOI of Published Version

10.1130/G24280A.1

Abstract

An exceptionally well-preserved aragonitic coral of the extinct species Goniopora hilli was collected from late Cenozoic sedimentary deposits in the Dominican Republic and dated using U-Pb techniques. Nine coralline subsamples yielded a U-238/(206)pb-Pb-207/Pb-206 three-dimensional (3-D) inverse linear concordia age of 5.52 +/- 0.15 (2 sigma) Ma, which, when coupled with Sr-17/Sr-86 ratios obtained from the same coral, allows for tighter constraints on temporal variability of marine species diversity prior to closure of the Central American Seaway. The recognition that pre-Quaternary aragonitic corals can be suitable for U-Pb dating creates new possibilities for refining the chronologies of late Cenozoic marine sedimentary sequences.

Keywords

Sustainability

Published Article/Book Citation

Geology, 36:2 (2008) pp.151-154.

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URL

https://ir.uiowa.edu/geology_pubs/122