Earp, C. (2024). Notanopliid brachiopods and associated fossils from the Yea area, central Victoria: a key to resolving age and correlation problems in a complex geological setting. Proceedings of the Royal Society of Victoria. 136: RS23021.

487326

10.1071/rs23021 [view]

Earp, C.

2024

136: RS23021

Publication

Poorly exposed and partly metamorphosed marine clastic sediments of the Broadford Formation and other units of Siluro-Devonian age occur in the Yea area of central Victoria, Australia. Numerous localities within the Yea area are reported in this study to contain brachiopod species in the family Notanopliidae, including Boucotia australis and Septaparmella plentiensis, and other associated fossils. A biostratigraphic scheme first proposed by M.J. Garratt and based mainly on notanopliids is widely used in central Victoria. Application of this scheme now results in confirmation of the age of the Broadford Formation in the Yea area as Pridoli–Lochkovian, with most of the unit being of Early Devonian age. This contrasts with earlier studies which claimed a late Silurian (?Wenlock–Pridoli) age based on reported occurrences of graptolites associated with the early Baragwanathia flora of the so-called Lower Plant Assemblage. It is concluded that at least some of the Lower Plant Assemblage localities are Early Devonian, but in other cases direct evidence from brachiopod biostratigraphy is lacking.

Brachiopoda

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