Conodont faunas from the mid to late Ordovician boundary interval of the Wahringa Limestone Member (Fairbridge Volcanics), Central New South Wales

Y. Y. Zhen*, I. G. Percival, B. D. Webby

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    23 Citations (Scopus)

    Abstract

    Twenty-nine conodont species are documented from the Wahringa Limestone Member and other isolated limestone pods of the Fairbridge Volcanics, in the Bakers Swamp area between Wellington and Orange, central New South Wales. Three conodont assemblages are recognised within the Wahringa Limestone Member. The oldest is characterised by the occurrence of Pygodus protoanserinus and Pygodus serra, indicative of a late Darriwilian age (Da3 to early Da4). The overlying assemblage B, bearing Belodina monitorensis, probably ranges across the Mid to Late Ordovician boundary. Assemblage C with abundant Belodina compressa in the upper part of the Wahringa Limestone Member is of late Gisbomian (Gi2) age. The conodont faunas are significant in being the first described from the Lachlan Orogen in New South Wales spanning the Mid to Late Ordovician interval, although resolution of the actual boundary level is limited in the section measured.

    Original languageEnglish
    Pages (from-to)141-164
    Number of pages24
    JournalProceedings of the Linnean Society of New South Wales
    Volume125
    Publication statusPublished - 2004

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