Archean molecular fossils and the early rise of eukaryotes.

@article{Brocks1999ArcheanMF,
  title={Archean molecular fossils and the early rise of eukaryotes.},
  author={Jochen J. Brocks and Graham A. Logan and Roger Buick and Roger Everett Summons},
  journal={Science},
  year={1999},
  volume={285 5430},
  pages={
          1033-6
        }
}
Molecular fossils of biological lipids are preserved in 2700-million-year-old shales from the Pilbara Craton, Australia. Sequential extraction of adjacent samples shows that these hydrocarbon biomarkers are indigenous and syngenetic to the Archean shales, greatly extending the known geological range of such molecules. The presence of abundant 2alpha-methylhopanes, which are characteristic of cyanobacteria, indicates that oxygenic photosynthesis evolved well before the atmosphere became… 
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References

SHOWING 1-10 OF 35 REFERENCES
Microfossils of the Early Archean Apex Chert: New Evidence of the Antiquity of Life
TLDR
It is established 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 evolved by this early stage in biotic history.
Megascopic eukaryotic algae from the 2.1-billion-year-old negaunee iron-formation, Michigan.
TLDR
Hundreds of specimens of spirally coiled, megascopic, carbonaceous fossils resembling Grypania spiralis (Walcott), have been found in the 2.1-billion-year-old Negaunee Iron-Formation at the Empire Mine, near Marquette, Michigan, placing the origin of organelle-bearing eukaryotic cells prior to 2.
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
Terminal Proterozoic reorganization of biogeochemical cycles
TLDR
It is shown that hydrocarbons extracted from Proterozoic sediments in several locations worldwide are derived mainly from bacteria or other heterotrophs rather than from photosyn-thetic organisms, and that preservation of algal-lipid skeletons improves at the beginning of the Cambrian, reflecting the increase in transport by rapidly sinking faecal pellets.
Evidence for life on Earth before 3,800 million years ago
IT is unknown when life first appeared on Earth. The earliest known microfossils (˜3,500 Myr before present) are structurally complex, and if it is assumed that the associated organisms required a
Early life on earth
This study is organized around three themes: the origin and early diversification of life during the Archean Eon; the maturation of life and the Earth during the long Proterozoic Eon; and the
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