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

Rhawn F. Denniston, Yemane Asmerom, Victor Y. Polyak, Donald F. McNeill, James S. Klaus, Peter Cole, Ann F. Budd

Research output: Contribution to journalArticle

23 Scopus citations

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 238U/206Pb-207Pb/206Pb three-dimensional (3-D) inverse linear concordia age of 5.52 ± 0.15 (2σ) Ma, which, when coupled with 87Sr/86Sr 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.

Original languageEnglish (US)
Pages (from-to)151-154
Number of pages4
JournalGeology
Volume36
Issue number2
DOIs
StatePublished - Feb 1 2008

Keywords

  • Central American Seaway
  • Coral
  • Dominican Republic
  • Miocene
  • Sr chemostratigraphy
  • U-Pb

ASJC Scopus subject areas

  • Geology

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    Denniston, R. F., Asmerom, Y., Polyak, V. Y., McNeill, D. F., Klaus, J. S., Cole, P., & Budd, A. F. (2008). Caribbean chronostratigraphy refined with U-Pb dating of a Miocene coral. Geology, 36(2), 151-154. https://doi.org/10.1130/G24280A.1