Mittagong Formation

Mittagong Formation
fine grained sandstone above coarser Hawkesbury Sandstone, West Pymble, 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 shale (above) and the Hawkesbury sandstone (below). The maximum thickness is ten metres.[2]

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

Sydney Basin, Hawkesbury sandstone, Wianamatta shale, Narrabeen group.

References

  1. ^ "Australian Museum - The Sydney Basin". http://australianmuseum.net.au/The-Sydney-Basin. 
  2. ^ "Geoscience Australia". http://dbforms.ga.gov.au/pls/www/geodx.strat_units.sch_full?wher=stratno=27489. 
  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". http://www.environment.gov.au/cgi-bin/sprat/public/publicshowcommunity.pl?id=38. 
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