Photosynthesis Research

, Volume 33, Issue 2, pp 75–89

The oldest records of photosynthesis

  • Stanley M. Awramik

DOI: 10.1007/BF00039172

Cite this article as:
Awramik, S.M. Photosynth Res (1992) 33: 75. doi:10.1007/BF00039172


There is diverse, yet controversial fossil evidence for the existence of photosynthesis 3500 million years ago. Among the most persuasive evidence is the stromatolites described from low grade metasedimentary rocks in Western Australia and South Africa. Based on the understanding of the paleobiology of stromatolites and using pertinent fossil and Recent analogs, these Early Archean stromatolites suggest that phototrophs evolved by 3500 million years ago. The evidence allows further interpretation that cyanobacteria were involved. Besides stromatolites, microbial and chemical fossils are also known from the same rock units. Some microfossils morphologically resemble cyanobacteria and thus complement the adduced cyanobacterial involvement in stromatolite construction. If cyanobacteria had evolved by 3500 million years ago, this would indicate that nearly all prokaryotic phyla had already evolved and that prokaryotes diversified rapidly on the early Earth.

Key words

cyanobacteria stromatolites fossil record Archean 

Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • Stanley M. Awramik
    • 1
  1. 1.Department of Geological Sciences, Preston Cloud Research LaboratoryUniversity of CaliforniaSanta BarbaraUSA

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