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Diatom biostratigraphy and age of the Pliocene Sørsdal Formation, Vestfold Hills, East Antarctica


Harwood, DM and McMinn, A and Quilty, PG, Diatom biostratigraphy and age of the Pliocene Sorsdal Formation, Vestfold Hills, East Antarctica, Antarctic Science, 12, (4) pp. 443-462. ISSN 0954-1020 (2000) [Refereed Article]

DOI: doi:10.1017/s0954102000000535


Fossil marine diatom assemblages from the Sørsdal Formation, a deposit of diatomaceous sand from Marine Plain in the Vestfold Hills, provide age and palaeoenvironmental information from a Pliocene coastal setting in East Antarctica. Benthic and meroplanktic diatom taxa suggest deposition in a shallow coastal embayment with water depths of 20-25 m. Diatom biostratigraphy indicates that the Sørsdal Formation belongs to the Fragilariopsis barronii Zone (4.5 to 4.1 Ma), through correlation to reference sections in the Ross Sea and Southern Ocean. Features of the other biota suggest higher sea-surface temperatures and reduced sea-ice cover, consistent with global records of higher sea level.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Palaeontology (incl. palynology)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:McMinn, A (Professor Andrew McMinn)
UTAS Author:Quilty, PG (Dr Pat Quilty)
ID Code:19636
Year Published:2000
Web of Science® Times Cited:47
Deposited By:IASOS
Deposited On:2000-08-01
Last Modified:2001-05-01

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