Diversity in the Archean Biosphere: New Insights from NanoSIMS
The origin of organic microstructures in the similar to 3 Ga Farrel Quartzite is controversial due to their relatively poor state of preservation, the Archean age of the cherts in which they occur, and the unusual spindle-like morphology of some of the forms. To provide more insight into the significance of these microstructures, nano-scale secondary ion mass spectrometry (NanoSIMS) maps of carbon, nitrogen, sulfur, silicon, and oxygen were obtained for spheroidal and spindle-shaped constituents of the Farrel Quartzite assemblage. Results suggest that the structures are all bona fide similar to 3 Ga microfossils.
Keywords: NanoSIMS ; Archean ; Pilbara ; Organic microfossil ; Spindle ; Microstructure ; Early evolution ; Farrel Quartzite ; Blue-Green-Algae ; Western-Australia ; Pilbara Craton ; Putative Microfossils ; Transvaal Supergroup ; Molecular Fossils ; South-Africa ; Life ; Stromatolites ; Cherts
Record created on 2012-05-15, modified on 2016-08-09