Warning: The NCBI web site requires JavaScript to function. more...
Generate a file for use with external citation management software.
Schopf JW.
Department of Earth and Space Sciences, University of California, Los Angeles 90024, USA.
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.
Your browsing activity is empty.
Activity recording is turned off.
Turn recording back on