The oldest Ordovician stromatoporoids from Australia

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Abstract

The oldest known Australian Ordovician stromatoporoids are described from the Cashions Creek Limestone (formerly the Madurites-Girvanella horizon) and correlatives of the Gordon Subgroup in Tasmania. The Cashions Creek Limestone and equivalents are correlated approximately with the North American Chazyan (Middle Ordovician). Representatives of Labechia, Stratodiclyon and Stromatocerium are recorded from localities in the Mole Creek area, from the Florentine Valley and from Melrose. Three new species, Labechia banksi, Stratodiclyon vetus and Stromatocerium bigsbyi are described. L. banksi comes from a slightly higher horizon in the succession at Mole Creek where it occurs in association with the earliest corals (Lichenaria). The distribution of the earliest Ordovician stromatoporoids — those appearing in the North American and Tasmanian successions — is reviewed, together with a discussion of their possible origins and interrelationships.

Original languageEnglish
Pages (from-to)237-251
Number of pages15
JournalAlcheringa
Volume3
Issue number4
DOIs
Publication statusPublished - 1 Jan 1979
Externally publishedYes

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