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The near-surface sediments of the Scott plateau and Java Trench: nannofossil assessment and implications

Created 17/10/2025

Updated 17/10/2025

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Quaternary sediments are apparently more widespread and better represented in the northern Scott Plateau and Java Trench than in parts of the central Scott Plateau, where older rocks are exposed on the sea floor. Nevertheless, wherever Quaternary calcareous nannofossils are recovered from these areas, they are associated with reworked Upper Cretaceous and Tertiary forms. This may have been caused by bottom currents actively eroding parts of the central Scott Plateau and redistributing the fine fraction elsewhere on the plateau, Java Trench and nearby areas. These currents may have been active from the middle Miocene. Late Pleistocene to Holocene calcareous nannofossils occur throughout the near-surface (ca 1 m thick) sediments in the northern Scott Plateau, but are absent from such sediments in the Java Trench. However, Pleistocene nannofossil assemblages, older than those from the Scott Plateau, occur intermittently at lower levels in the near-surface (ca 1 m thick) sediments in the Java Trench. This difference is explained by suggesting that the present Nanno Solution Depth lies between 3290 m and 4950 m water depth in the Scott Plateau and Java Trench areas, but in earlier Quaternary times it fluctuated between 5090 m and 5424 m in the same areas.

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Title The near-surface sediments of the Scott plateau and Java Trench: nannofossil assessment and implications
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/191c3b63-0851-4dde-83ce-d8aca1fbc3d1
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        117.0,
        -14.0
      ],
      [
        123.0,
        -14.0
      ],
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        -10.0
      ],
      [
        117.0,
        -10.0
      ],
      [
        117.0,
        -14.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "The near-surface sediments of the Scott plateau and Java Trench: nannofossil assessment and implications". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/the-near-surface-sediments-of-the-scott-plateau-and-java-trench-nannofossil-assessment-and-impl