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Palaeo-geomorphological significance of miocene and pliocene euryhaline ostracoda in the Nepean 1 borehole, Port Phillip Basin, SE Australia

Warne, Mark T. 2003, Palaeo-geomorphological significance of miocene and pliocene euryhaline ostracoda in the Nepean 1 borehole, Port Phillip Basin, SE Australia, Memoir ... of the Association of Australasian Palaeontologists, vol. 27, pp. 139-148.

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Title Palaeo-geomorphological significance of miocene and pliocene euryhaline ostracoda in the Nepean 1 borehole, Port Phillip Basin, SE Australia
Author(s) Warne, Mark T.ORCID iD for Warne, Mark T. orcid.org/0000-0001-5456-191X
Journal name Memoir ... of the Association of Australasian Palaeontologists
Volume number 27
Start page 139
End page 148
Publisher Geological Society of Australia Inc.
Place of publication Sydney, N.S.W.
Publication date 2003
ISSN 0810-8889
Keyword(s) geomorphology
Miocene
Pliocene
Ostracoda
eustasy
Victoria
Summary Ostracoda able to tolerate significant fluctuations in salinity occur as fossils in latest Late Miocene and earliest Late Pliocene strata of the Nepean 1 borehole within the Port Phillip Basin. The main euryhaline species present are Osticythere baragwanathi (Chapman & Crespin), Leptocythere hartmanni (McKenzie), Xestoleberis cedunaensis Hartmann and Tanella gracilis Kingma. Euryhaline ostracods occur in both high diversity, high abundance fossil ostracod assemblages and in low diversity, high abundance  assemblages. These latest Late Miocene and earliest Late Pliocene fossil ostracod assemblages accumulated close to the maximum point of flooding during respective marine transgressions onto the northern Bass Strait hinterland. The presence of euryhaline Ostracoda in these assemblages  is reminiscent of ostracod occurrences associated with modern day SE Australian barrier coastlines. Euryhaline ostracods are not common in earlier Cenozoic sediments of SE Australia and Osticythere baragwanathi makes its first appearance in the latest Late Miocene beds of the Nepean 1 borehole. This latter occurrence is interpreted to reflect the initial phase of development for the modern SE Australian barrier coastline and in particular, the initial formation of Port Phillip Bay as a coastal geomorphological feature.
Language eng
Field of Research 040308 Palaeontology (incl Palynology)
Socio Economic Objective 970104 Expanding Knowledge in the Earth Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
HERDC collection year 2003
Copyright notice ©2003, Geological Society of Australia
Persistent URL http://hdl.handle.net/10536/DRO/DU:30031125

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