Evergreen Formation

The Evergreen Formation is a Pliensbachian to Toarcian geologic formation of the Surat Basin in New South Wales and Queensland, eastern Australia. It is Upper Pliensbachian to Toarcian in age.[1][2]

Evergreen Formation Stratigraphic range: Upper Pliensbachian-Toarcian ~185–175 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Bundamba Group
Sub-units	Boxvale Sandstone & Westgrove Ironstone Members
Underlies	Hutton Sandstone
Overlies	Precipice Sandstone
Thickness	Up to 255 m (837 ft)
Lithology
Primary	Sandstone, siltstone, mudstone
Other	Coal, ironstone
Location
Coordinates	25.8°S 150.3°E
Approximate paleocoordinates	61.7°S 90.0°E
Region	New South Wales  Queensland
Country	Australia
Extent	Surat Basin
Evergreen Formation (Australia)

Fossil content

The temnospondyl Siderops, Decorotergum warrenae and indeterminate plesiosaur fossils are known from the formation, deposited in a lacustrine environment.[3]

References

1. "Australian Government- Geoscience Australia Australian Stratigraphic Units Database". ga.gov.au. Geoscience Australia. Retrieved 19 January 2015.
2. Todd, Christopher N.; Roberts, Eric M.; Knutsen, Espen M.; Rozefelds, Andrew C.; Huang, Hui-Qing; Spandler, Carl (December 2019). "Refined age and geological context of two of Australia's most important Jurassic vertebrate taxa (Rhoetosaurus brownei and Siderops kehli), Queensland". Gondwana Research. 76: 19–25. doi:10.1016/j.gr.2019.05.008.
3. Kolane at Fossilworks.org

Further reading

• A. Warren. 1977. Jurassic labyrinthodont. Nature 265:436-437