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A review of the Corella Formation, Mount Isa Inlier, Queensland

Created 17/10/2025

Updated 17/10/2025

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As mapped by previous workers, the Corella Formation is the most extensively exposed formation in the eastern succession of the Proterozoic Mount Isa Inlier. Outcrops consist partly or predominantly of thin-bedded calcareous metasediments, many of which are scapolitic, and occur in three zones. The Corella rocks in the westernmost zone, Zone A, form a well-defined stratigraphic unit overlying felsic volcanics dated at about 1780 m.y., and it is suggested that they be assigned to a new formation. Those in the central zone, Zone B, probably belong to at least two separate units, one more than 1740 m.y. old and possibly older than 1870 m.y., and one about 1600 m.y. old, 70 m.y. younger than the Mount Isa Group. Zone B contains the type section for the Corella Formation, but this defines neither the top nor the base of the formation, its location is uncertain, and stratigraphic relations of rock types within it are largely unknown. The suggestion is made that, for the present, the Corella Formation in Zone B be downgraded to Corella beds. The Corella rocks in Zone C, to the southeast, can be assigned to two units-the Doherty Formation, which contains rhyolite dated at about 1720 m.y., and the less-metamorphosed and probably younger Staveley Formation.

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Field Value
Title A review of the Corella Formation, Mount Isa Inlier, Queensland
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/dd41e43c-b8dc-4bc9-bf3b-e0da63ad400e
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        139.0,
        -22.0
      ],
      [
        141.0,
        -22.0
      ],
      [
        141.0,
        -20.0
      ],
      [
        139.0,
        -20.0
      ],
      [
        139.0,
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      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "A review of the Corella Formation, Mount Isa Inlier, Queensland". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/a-review-of-the-corella-formation-mount-isa-inlier-queensland