Microfossils of the Early Archean Apex Chert: New Evidence of the Antiquity of Life

@article{Schopf1993MicrofossilsOT,
  title={Microfossils of the Early Archean Apex Chert: New Evidence of the Antiquity of Life},
  author={J. William Schopf},
  journal={Science},
  year={1993},
  volume={260},
  pages={640 - 646}
}
  • J. Schopf
  • Published 30 April 1993
  • Environmental Science
  • Science
Eleven taxa (including eight heretofore undescribed species) of cellularly preserved filamentous microbes, among the oldest fossils known, have been discovered in a bedded chert unit of the Early Archean Apex Basalt of northwestern Western Australia. This prokaryotic assemblage establishes that trichomic cyanobacterium-like microorganisms were extant and morphologically diverse at least as early as ∼3465 million years ago and suggests that oxygen-producing photoautotrophy may have already… 
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1,212 Citations
Highly Influential Citations
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Background Citations
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Methods Citations
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1,212 Citations

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Early proterozoic pillow lavas of Suisari as habitats of the earliest microorganisms
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References

SHOWING 1-10 OF 54 REFERENCES
Filamentous fossil bacteria from the Archean of Western Australia
Stromatolites 3,400-Myr old from the Archean of Western Australia
  • D. Lowe
  • Environmental Science, Geology
    Nature
  • 1980
Internally laminated conical mounds characterise a regionally extensive chert unit near the top of the 3,400-Myr old Warrawoona Group in the Pilbara Block of Western Australia. The chert formed by…
Early Archean (3.3-billion to 3.5-billion-year-old) microfossils from Warrawoona Group, Australia.
Cellularly preserved filamentous and colonial fossil microorganisms have been discovered in bedded carbonaceous cherts from the Early Archean Apex Basalt and Towers Formation of northwestern Western…
Microfossils and possible microfossils from the Early Archean Onverwacht Group, Barberton Mountain Land, South Africa.
Microflora of the Bitter Springs Formation, late Precambrian, central Australia
Thirty new species, representing 24 new genera, of green algae, blue-green algae, colonial bacteria, fungus-like filaments, and possible pyrrophytes, are described from the bedded carbonaceous cherts…
Microorganisms Three Billion Years Old from the Precambrian of South Africa
TLDR
A minute, bacterium-like, rod-shaped organism, Eobacterium isolatum, has been found organically and structurally preserved in black chert from the Fig Tree Series of South Africa, and these organic remnants comprise the oldest known evidence of biological organization in the geologic record.
Microfossil recognition in Archean rocks : an appraisal of spheroids and filaments from a 3500 M.Y. old chert-barite unit at North Pole, Western Australia
Except in exceptional circumstances, real Archean microfossils should occur in thin sections of low-grade rocks of sedimentary origin, consist of kerogen, exceed the minimum size for independently…
Filamentous microfossils from the 3,500-Myr-old Onverwacht Group, Barberton Mountain Land, South Africa
The Swaziland Supergroup, Barberton Mountain Land, South Africa, has long been regarded as a promising location for the Earth's oldest fossils because it includes some of the most ancient…
Significance of the Gunflint (Precambrian) Microflora
  • P. Cloud
  • Environmental Science
    Science
  • 1965
Several categories of biological microstructures 1.9� billion years old are here described, illustrated, and referred to a group of early thallophytes that includes the thread bacteria and the…
Stromatolites 3,400–3,500 Myr old from the North Pole area, Western Australia
Stromatolites are the least controversial evidence of early life; they are organosedimentary structures resulting from the growth and metabolic activity of microorganisms1. Before this report,…
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