Ordovician brachiopod biostratigraphy of central-western New South Wales

I. G. Percival

Ordovician brachiopod biostratigraphy of central-western New South Wales

I. G. Percival

Research output: Contribution to journal › Article › peer-review

Abstract

Late Ordovician (Caradoc) formations of the Molong High and Parkes Platform in central-western NSW contain five brachiopod zones. The earliest, Fauna A, induces the diagnostic species Webbyspira principalis. Fauna AB is typified by the abrupt appearance of several new diminutive genera together with rapidly evolving transitional forms. Brachiopod Fauna B is contemporaneous with coral/stromatoporoid Fauna II. Abrupt faunal changeover at the end of Fauna B time coincided with cessation of carbonate deposition along the eastern Molong High and Parkes Platform. Graptolitic siltstones and spiculites at this level contain six brachiopod genera new to the succession, constituting Fauna C. Higher levels in the Parkes Platform sequence contain Fauna D. The stratigraphic significance of each zone is outlined, and correlations with North America and Kazakhstan are suggested. -from Author

Original language	English
Pages (from-to)	215-229
Number of pages	15
Journal	American Society of Mechanical Engineers (Paper)
Publication status	Published - 1992

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abstract = "Late Ordovician (Caradoc) formations of the Molong High and Parkes Platform in central-western NSW contain five brachiopod zones. The earliest, Fauna A, induces the diagnostic species Webbyspira principalis. Fauna AB is typified by the abrupt appearance of several new diminutive genera together with rapidly evolving transitional forms. Brachiopod Fauna B is contemporaneous with coral/stromatoporoid Fauna II. Abrupt faunal changeover at the end of Fauna B time coincided with cessation of carbonate deposition along the eastern Molong High and Parkes Platform. Graptolitic siltstones and spiculites at this level contain six brachiopod genera new to the succession, constituting Fauna C. Higher levels in the Parkes Platform sequence contain Fauna D. The stratigraphic significance of each zone is outlined, and correlations with North America and Kazakhstan are suggested. -from Author",

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AB - Late Ordovician (Caradoc) formations of the Molong High and Parkes Platform in central-western NSW contain five brachiopod zones. The earliest, Fauna A, induces the diagnostic species Webbyspira principalis. Fauna AB is typified by the abrupt appearance of several new diminutive genera together with rapidly evolving transitional forms. Brachiopod Fauna B is contemporaneous with coral/stromatoporoid Fauna II. Abrupt faunal changeover at the end of Fauna B time coincided with cessation of carbonate deposition along the eastern Molong High and Parkes Platform. Graptolitic siltstones and spiculites at this level contain six brachiopod genera new to the succession, constituting Fauna C. Higher levels in the Parkes Platform sequence contain Fauna D. The stratigraphic significance of each zone is outlined, and correlations with North America and Kazakhstan are suggested. -from Author

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Ordovician brachiopod biostratigraphy of central-western New South Wales

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