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Age and palaeoenvironment of Pliocene sediments, Cameron Inlet Formation, eastern Flinders Island, Tasmania: implications for southeastern Australian biostratigraphy

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Quilty, PG and Whitehead, J and Lewis, D (2013) Age and palaeoenvironment of Pliocene sediments, Cameron Inlet Formation, eastern Flinders Island, Tasmania: implications for southeastern Australian biostratigraphy. Papers and Proceedings of the Royal Society of Tasmania, 147. pp. 51-84. ISSN 0080-4703

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Abstract

A previously unrecorded thin unit of very Early Pliocene calcareous sediments of the Cameron Inlet Formation from two auger holes in
central Flinders Island, Tasmania, has yielded a very diverse fauna of benthic Foraminifera and enough planktonic forms to allow fine correlation
with international biostratigraphic standards (N19, approximately 5.3–4.4 Ma, or Lower Opoitian in New Zealand terminology).
Ostracods are also recorded. It is older than an earlier recorded sample from North Patriarch Drain a few kilometres away. It lies within the
Kalimnan of southeastern Australian stage nomenclature and probably equivalent to 1985 Molluscan Assemblage XVI. The sediments and
faunas accumulated in very shallow, fully marine conditions, initially with some possible estuarine aspect that faded with time. The fauna is
of well-known species, dominated by Parredicta kalimnensis (Parr, 1939). Other abundant and diverse forms are elphidiids and cibicidids.
Agglutinated forms are almost absent and miliolids are diverse but minor components. The fauna includes a new polymorphinid genus
and species that will be described elsewhere. The samples contain a bewildering array of unilocular forms. Water temperature appears to
have been about 12°C. The Kalimnan Stage may encompass the entire Pliocene and two substages may be identifiable.

Item Type: Article
Keywords: Pliocene, Flinders Island, Foraminifera, ostracods, Cameron Inlet Formation, Kalimnan, Royal Society of Tasmania, RST, Van Diemens Land, natural history, science, papers & proceedings, Australia
Journal or Publication Title: Papers and Proceedings of the Royal Society of Tasmania
Page Range: pp. 51-84
ISSN: 0080-4703
Copyright Information:

Copyright The Royal Society of Tasmania

Collections: Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Date Deposited: 11 Nov 2015 01:20
Last Modified: 08 Jan 2016 16:00
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