Kungarra Formation
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| Kungarra Formation | |
|---|---|
| Stratigraphic range: Siderian ~ | |
| Type | Formation |
| Unit of | Turee Creek Group |
| Sub-units | Meteorite Bore Member |
| Underlies | Koolbye Formation |
| Overlies | Boolgeeda Iron Formation |
| Thickness | ~2,000 m (6,600 ft) |
| Lithology | |
| Primary | Siltstone |
| Other | Diamictite, Shale |
| Location | |
| Coordinates | 22°50′48″S 116°52′12″E / 22.84667°S 116.87000°E |
| Region | Western Australia |
| Country | Australia |
  Kungarra Formation (Australia)  Kungarra Formation (Western Australia) | |
The Kungarra Formation is an Siderian aged geologic formation in Western Australia.
Members
The Kungarra Formation can be found within the Turee Creek Group, reaching up to around ~2,000 m (6,600 ft) thick and is composed predominately of siltstone and fine-grained sandstone, with a singular member in the middle of the formation known as the "Meteorite Bore Member", which is composed of diamictite. It is underlain by the Boolgeeda Iron Formation of the Hamersley Group, whilst it is overlain by the sandstone dominated Koolbye Formation.[1]
There is only a single named member in the formation, the Meteorite Bore Member. This member in its type section reaches up to 270 m (890 ft) thick, and sits roughly ~1,800 m (5,900 ft) above the base of the Kungarra Formation. It is primarily composed of diamictite and shale.[1] The member was also deposited during a glacial period, primarily at a rapidly melting ice-front, inferred from glacigenic sediment being found restricted to certain areas of the member as well as various clasts, and the distinct lack of evidence of an ice shelf or large icebergs.[1]
