Mittagong Formation | |
---|---|
Stratigraphic range: | |
Type | Geological formation |
Underlies | Ashfield Shale |
Overlies | Hawkesbury sandstone |
Thickness | up to 10 metres (30 ft) |
Location | |
Location | Sydney Basin |
Country | Australia |
Type section | |
Region | Mittagong |
Country | Australia |
Thickness at type section | 15 metres |
The Mittagong Formation is a sedimentary rock unit in the Sydney Basin in eastern Australia. [1]
Laid down in the Triassic Period, it may be seen as an interval of interbedded fine-grained sandstone and shale between the Ashfield Shale (above) and the Hawkesbury sandstone (below). The maximum thickness around Sydney may be ten metres. [2] Near Town Hall railway station, the formation is 8 metres thick. In the type area at Mittagong it is 15 metres thick.
In northern Sydney it can be seen in several 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]
Mittagong Formation | |
---|---|
Stratigraphic range: | |
Type | Geological formation |
Underlies | Ashfield Shale |
Overlies | Hawkesbury sandstone |
Thickness | up to 10 metres (30 ft) |
Location | |
Location | Sydney Basin |
Country | Australia |
Type section | |
Region | Mittagong |
Country | Australia |
Thickness at type section | 15 metres |
The Mittagong Formation is a sedimentary rock unit in the Sydney Basin in eastern Australia. [1]
Laid down in the Triassic Period, it may be seen as an interval of interbedded fine-grained sandstone and shale between the Ashfield Shale (above) and the Hawkesbury sandstone (below). The maximum thickness around Sydney may be ten metres. [2] Near Town Hall railway station, the formation is 8 metres thick. In the type area at Mittagong it is 15 metres thick.
In northern Sydney it can be seen in several 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]