Early Archean (3.3-billion to 3.5-billion-year-old) microfossils from Warrawoona Group, Australia

See allHide authors and affiliations

Science  03 Jul 1987:
Vol. 237, Issue 4810, pp. 70-73
DOI: 10.1126/science.11539686


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 Australia. The cell types detected suggest that cyanobacteria, and therefore oxygen-producing photosynthesis, may have been extant as early as 3.3 billion to 3.5 billion years ago. These fossils are among the oldest now known from the geologic record; their discovery substantiates previous reports of Early Archean microfossils in Warrawoona Group strata.

Stay Connected to Science