Warrawoona Group
| Warrawoona Group | |
|---|---|
| Stratigraphic range: Paleoarchean ~ | |
Warrawoona and Western Australia showing geological classification | |
| Type | Geological group |
| Unit of | Pilbara Supergroup |
| Lithology | |
| Primary | Chert |
| Other | Archean felsic volcanic rocks |
| Location | |
| Coordinates | 21°42′S 118°0′E / 21.700°S 118.000°E |
| Region | Western Australia |
| Country | Australia |
| Extent | Pilbara craton |
| Type section | |
| Named for | Warrawoona |
| Named by | Arthur Hugh Hickman |
| Year defined | 1983 |
Warrawoona Group (Australia) Warrawoona Group (Western Australia) | |
The Warrawoona Group is a geological unit in Western Australia containing putative fossils of cyanobacteria cells. Dated between 3.53–3.427 Ga, these microstructures, found in Archean chert, are considered to be the oldest known geological record of life on Earth.