by Richard I. Gibson
The Fig Tree Group of rocks in eastern South Africa contains some relatively well-preserved fossils around 3.2 billion years old, probably bacterial mats that built up into forms called stromatolites, similar to the convoluted thin layers in the image at right (Siyeh Formation, Glacier National Park, public domain photo, National Park Service).
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The Fig Tree Group of rocks in eastern South Africa contains some relatively well-preserved fossils around 3.2 billion years old, probably bacterial mats that built up into forms called stromatolites, similar to the convoluted thin layers in the image at right (Siyeh Formation, Glacier National Park, public domain photo, National Park Service).
Listen to the podcast:
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