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Geology of the eastern part of the Canberra 4-mile sheet

Created 16/10/2025

Updated 16/10/2025

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A reconnaissance survey of the eastern half of the Canberra 4-mile sheet was made during the period January - February 1952. The area mapped may be arbitrarily divided into two sections: the western section includes the eastern halves of the Canberra, Michelago, and Bredbo 1-mile sheets, and the eastern section comprises four 1-mile sheets - Lake Bathurst, Braidwood, Araluen and Bendethera. Belts of strongly folded Ordovician, Silurian and Devonian strata, with associated elongate masses of granite rocks, were encountered; they trend gradually northwards. Graptolites collected from Ordovician strata provide means to date these rocks accurately, and further study of the corals collected from Silurian limestones will similarly permit precise dating. Three fossil localities were found in the Devonian strata, but the brachiopods collected, although well-preserved and representative of many genera, do not permit precise stratigraphical placing without more intensive examination. Outcrops are generally very good in all parts except the Lake Bathurst area, where an extensive cover of Tertiary and later deposits obscures the Palaeozoic rocks.

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Additional Info

Field Value
Title Geology of the eastern part of the Canberra 4-mile sheet
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/0853fe43-cc4c-454e-bdae-8a43075cbc02
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        148.5,
        -36.0
      ],
      [
        150.0,
        -36.0
      ],
      [
        150.0,
        -35.0
      ],
      [
        148.5,
        -35.0
      ],
      [
        148.5,
        -36.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Geology of the eastern part of the Canberra 4-mile sheet". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/geology-of-the-eastern-part-of-the-canberra-4-mile-sheet