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Late Paleocene foraminiferal faunas with Chapmanina and Reticulophragmium from offshore southeastern Australia: a Tethyan influence

journal contribution
posted on 2023-05-16, 18:56 authored by Quilty, PG, Packham, GH
Samples from off southern New South Wales in approximately 1750 m water depth have yielded late Paleocene faunas of benthic and planktonic foraminifera and other invertebrates. Two faunal associations with a strong Tethyan influence, dominated respectively by Chapmanina conjuncta sp. nov. and Reticulophragmium naroomaensis sp. nov., are described; this is the first formal record of these genera from Australasia. The age of the host sediment is based on both benthic species and few planktonic foraminifera. The environment at the time was warm temperate to subtropical at the southwestern extremity of a counter-clockwise Pacific Ocean gyre. The new occurrence extends the record of Palaeogene marine sediments and palaeoenvironments along the eastern margin of Australia and confirms earlier observations that conditions in the marine environment at that time were considerably warmer along the east coast of Australia than those along the southern margin; the biogeographic association was Tethyan. The circulation model may go some way to explaining coeval warmth along the east Antarctic coast. © AAP.

History

Publication title

Alcheringa

Volume

30

Pagination

315-341

ISSN

0311-5518

Department/School

School of Natural Sciences

Publisher

Geological Society Australia Inc

Place of publication

Sydney, NSW

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the earth sciences

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