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 | |
|---|---|
| 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 |   |
| Country | .svg.png){kind=small} |
| Extent | Surat Basin |
  Evergreen Formation (Australia) | |
Fossil content
Early-Mid Jurassic (170 Ma)
The temnospondyl Siderops, Decorotergum warrenae and indeterminate plesiosaur fossils are known from the formation, deposited in a lacustrine environment.[3]
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References
- "Australian Government- Geoscience Australia Australian Stratigraphic Units Database". ga.gov.au. Geoscience Australia. Retrieved 19 January 2015.
- 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.
- Kolane at Fossilworks.org
Further reading
- A. Warren. 1977. Jurassic labyrinthodont. Nature 265:436-437
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