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Mittagong Formation

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fine grained sandstone with lichen, Mount Ku-ring-gai, Australia

The Mittagong Formation is a type of sedimentary rock occurring in the Sydney Basin in eastern Australia.[1] Formed in the Triassic Period. It may be seen as a narrow band of fine grained sandstone between the Ashfield Shale (above) and the Hawkesbury sandstone (below). The maximum thickness is ten metres.[2] Near Town Hall railway station, the formation is 8 metres thick.

In northern Sydney it can be seen in a few areas, such as West Pymble[3] and Mount Ku-ring-gai.[4] This rock formation is associated with the critically endangered Sydney Turpentine-Ironbark Forest.[5]

See also

References

  1. ^ "Australian Museum - The Sydney Basin".
  2. ^ "Geoscience Australia".
  3. ^ Field Geology of New South Wales, Sydney Basin page 102
  4. ^ Chris Herbert. Geology of the Sydney 1:100,000 Sheet 9130
  5. ^ "Sydney Turpentine-Ironbark Forest".


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