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Ripple cross-laminated sediments on the East Antarctic Shelf: evidence for episodic bottom water production during the Holocene?

Created 16/10/2025

Updated 16/10/2025

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Biosiliceous sediments sampled from a submarine valley system on the continental shelf of East Antarctica contain intervals of ripple cross-lamination interspersed with massively bedded units. Based on radiocarbon dates from one core collected on the Mac.Robertson Shelf, the most intensely cross-laminated sediments were deposited between 6 000 and 3 500 years before the present, with isolated cross-laminae deposited at other times in the Holocene.

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Field Value
Title Ripple cross-laminated sediments on the East Antarctic Shelf: evidence for episodic bottom water production during the Holocene?
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/86d24f1a-c7f9-4df7-8894-23d9af31da87
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        62.0,
        -67.75
      ],
      [
        66.0,
        -67.75
      ],
      [
        66.0,
        -66.9
      ],
      [
        62.0,
        -66.9
      ],
      [
        62.0,
        -67.75
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Ripple cross-laminated sediments on the East Antarctic Shelf: evidence for episodic bottom water production during the Holocene?". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/ripple-cross-laminated-sediments-on-the-east-antarctic-shelf-evidence-for-episodic-bottom-water