Significance
Moderate/Medium
Shallow marine and lacustrine stromatolites in carbonates
organic-walled microfossils (eg cyanobacteria) in siliciclastics / cherts / carbonates
Controversial records of 2.2 Ga “trace fossils”
Additional Comments
Classic Early Proterozoic stromatolitic successions (Ghaap & Postmasburg Groups of Griqualand West Basin)
Early continental shelf environments (margins of Kaapvaal Craton)
Geological Formations