(Description) Figure 10 Silicified microfossils in quartz grains from the Kromberg Formation – 3.42 Ga old – in the Barberton Greenstone Belt. The dividing cells are revealed by acid etching but are still partly entombed in the quartz.

Week 8: Moons and the future

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This is an image of silicified microfossils in quartz grains from the Kromberg Formation – 3.42 Ga old – in the Barberton Greenstone Belt.