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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 3.465 Ga, these microstructures, found in Archean chert, are considered to be the oldest known geological record of life on Earth.[1][2][3]
- ^ Skrzypczak, A.; Derenne, S.; Robert, F.; Binet, L.; Gourier, D.; Rouzard, J.-N.; Clinard, C. (March 2004). Characterization Of The Organic Matter In An Archean Chert (Warrawoona, Australia) (PDF). 35th Lunar and Planetary Science Conference. League City, TX. Bibcode:2004LPI....35.1241S.
- ^ Derenne, S.; Robert, F.; Skrzypczak-Bonduelle, A.; Gourier, D.; Binet, L.; Rouzaud, J.-N. (July 2008). "Molecular evidence for life in the 3.5 billion year old Warrawoona chert". Earth and Planetary Science Letters. 272 (1–2): 476–480. Bibcode:2008E&PSL.272..476D. doi:10.1016/j.epsl.2008.05.014.
- ^ Schopf, J. W.; Packer, B. M. (September 1986). "Newly discovered early Archean (3.4–3.5 Ga Old) microorganisms from the Warrawoona Group of Western Australia". Origins of Life and Evolution of the Biosphere. 16 (3–4): 339–340. Bibcode:1986OrLi...16..339S. doi:10.1007/BF02422059. S2CID 39363922.
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