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Cretaceous to Cenozoic controls on the genesis of the shelf-incising Perth Canyon

Created 17/10/2025

Updated 17/10/2025

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Perth Canyon is Australia's second largest submarine canyon, and its elongate and continental shelf-incising morphology contrasts with Australia's more prolific slope-confined canyons. The canyon's sinuous course extends for 120 km from the continental shelf break (~180 m depth, only 50 km offshore from Perth) to its fan at the foot of the continental slope (~4500 m). This seminar will describe the application of a new, internationally-collaborative mapping approach to capture the complexity of the canyon and to link its modern morphology to subsurface data and thereby reconstruct its geological evolution. Infilled incised valleys found in seismic data beneath the canyon headwall suggest that the canyon initially incised in the Late Cretaceous (around 70 million years ago), and subsequent incisions and canyon activity have since declined in scale. Repeat surveys of the canyon headwall following two relatively large earthquakes in 2018 reveal minimal instability of the seafloor and suggest that the canyon is now less active than in it has been in its geological past.

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Field Value
Title Cretaceous to Cenozoic controls on the genesis of the shelf-incising Perth Canyon
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/6bfe250e-5109-4a27-b4ad-cc1ff88da4f5
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 08/04/2019
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        112.0,
        -44.0
      ],
      [
        154.0,
        -44.0
      ],
      [
        154.0,
        -9.0
      ],
      [
        112.0,
        -9.0
      ],
      [
        112.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Cretaceous to Cenozoic controls on the genesis of the shelf-incising Perth Canyon". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/cretaceous-to-cenozoic-controls-on-the-genesis-of-the-shelf-incising-perth-canyon