Age of an early Devonian carbonate fan and isolated limestone clasts and megaclasts, east-central Victoria

R. Mawson, J. A. Talent

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    44 Citations (Scopus)

    Abstract

    Conodont data are presented for stratigraphic sections through Early Devonian carbonate units of the Coopers Creek Limestone in the Tyers-Boola area, and for isolated limestone megaclasts, and limestone boulders from debris-flows in the Early Devonian flyschoid sequences in the nearby Deep Creek-Marble Creek and Platina-Coopers Creek areas of east-central Victoria. The conodont data from the Tyers-Boola area indicates that the limestones of this area span most of the Pragian and extend into earliest Emsian. Conodonts from richly fossiliferous limestone boulders in debris flows and from isolated megaclasts in the Platina-Coopers Creek and Deep Creek-Marble Creek areas in the southern part of the Walhalla Synclinorium, though mostly not compelling as to age, include a megaclast, at the base of the Wilson Creek Shale, with a kindlei Zone (mid-Pragian) conodont fauna. Other limestone boulders and megaclasts of the region appear to be early Pragian or even Lochkovian, antedating the onset of carbonate sedimentation in the vicinity of the Tyers-Boola carbonate fan. They are evidence for a former tract or tracts of shallow water carbonates (a "lost' carbonate platform) accumulated during the Lochkovian-early Pragian, and lithified prior to incorporation in the Boola, Wurutwun and Wilson's Creek formations. -from Authors

    Original languageEnglish
    Pages (from-to)31-70
    Number of pages40
    JournalProceedings - Royal Society of Victoria
    Volume106
    Publication statusPublished - 1994

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