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Diatom biostratigraphy and age of the Pliocene Sørsdal Formation, Vestfold Hills, East Antarctica
journal contribution
posted on 2023-05-16, 12:19 authored by Harwood, DM, Andrew McMinnAndrew McMinn, Quilty, PGFossil 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.
History
Publication title
Antarctic ScienceVolume
12Issue
4Pagination
443-462ISSN
0954-1020Department/School
Institute for Marine and Antarctic StudiesPublisher
Cambridge University PressPlace of publication
New YorkRepository Status
- Restricted