Stable isotopes in late Pennsylvanian brachiopods from the United States: implications for Carboniferous paleoceanography

E. L. Grossman, Horng-Sheng Mii, T. E. Yancey

    Research output: Contribution to journalArticlepeer-review

    110 Citations (Scopus)

    Abstract

    Stable isotopic analyses have been performed on nearly 500 nonluminescent brachiopod shells from Kansas, New Mexico, and Texas to evaluate temporal and geographic variability in the carbon and oxygen isotopic record for Late Pennsylvanian time. Regional variations are observed in the δ18O and δ13C values of nonluminescent brachiopod shells of the same genera. Data for nonluminescent brachiopods and marine cements reveal a mid-Carboniferous δ13C increase of 2‰ in Paleotethyan sea water. This increase is not seen in samples from the North American epicontinental seas, which opened to the Panthalassa ocean. This regional difference in δ13C appears to be due to changes in ocean circulation associated with the closing of the equatorial seaway and formation of Pangea. -from Authors

    Original languageEnglish
    Pages (from-to)1284-1296
    Number of pages13
    JournalGeological Society of America Bulletin
    Volume105
    Issue number10
    DOIs
    Publication statusPublished - 1993 Jan 1

    ASJC Scopus subject areas

    • Geology

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