Microfossils of the Early Archean Apex Chert: New Evidence of the Antiquity of Life
Abstract
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 evolved by this early stage in biotic history.
- Publication:
-
Science
- Pub Date:
- April 1993
- DOI:
- 10.1126/science.260.5108.640
- Bibcode:
- 1993Sci...260..640S