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Tectonics and Basin Development of the Offshore Tasmanian Area Incorporating Results from Deep Sea Cores

Created 16/10/2025

Updated 16/10/2025

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With the fragmentation of Gondwana, the southern continents other than Antarctica drifted northward and the global climate changed. One of the two key separation points, Tasmania-Antarctica, the Tasmanian Gateway is the subject of this volume. What was the tectonic history of Tasmanian Gateway opening, and how did gateway development impact sediments, ocean circulation and climate? The Cenozoic Southern Ocean: Tectonics, Sedimentation and Climate Change between Australia and Antarctica responds to such questions with new research and interpretations on three geological phases: the rifts before the gateway opened, the deepening gateway, and changes in this part of the Southern Ocean as Australia moved northward from Antarctica. Contributing authors discuss: - The history of the Tasmanian Gateway/Seaway opening, beginning at the Eocene/Oligocene boundary, which caused fundamental changes in ocean circulation, and altered Antarctic glacial development and global climate during the last 33 m.y. - Neogene development of the Southern Ocean based on stable isotopic sequences rarely available for such high southern latitudes - Latest Cretaceous to Eocene interplay of tectonics, subsidence and sea level fluctuations as East Gondwana broke up, as revealed in shallow marine siliciclastic sediments - Stratigraphic investigations of key geological transitions at high southern latitudes - Cenozoic marine biostratigraphic and biogeographic development in the Antarctic -Subantarctic region between Australia and Antarctica. Marine geologists, geophysicists, geochemists, atmospheric physicists, climatologists, and students of Earth history will find this volume a distinctive resource for current and future research needs. Geophysical Monograph Series, Volume 151, 344 pages, hardbound, 2004, ISBN 0-87590-416-5, AGU Code GM1514165.

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Additional Info

Field Value
Title Tectonics and Basin Development of the Offshore Tasmanian Area Incorporating Results from Deep Sea Cores
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/6cf7ad6c-920c-490a-8bbf-cd961f753fbd
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        130.0,
        -70.0
      ],
      [
        170.0,
        -70.0
      ],
      [
        170.0,
        -35.0
      ],
      [
        130.0,
        -35.0
      ],
      [
        130.0,
        -70.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Tectonics and Basin Development of the Offshore Tasmanian Area Incorporating Results from Deep Sea Cores". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/tectonics-and-basin-development-of-the-offshore-tasmanian-area-incorporating-results-from-deep-