STROMATOLITES were the "Breath of Life" on earth, producing oxygen, nitrogen, and carbon.
Stromatolites provide some of the most ancient records of life on Earth.
Stromatolites were much more abundant on the planet in Precambrian times. One genus of stromatolite very common in the geologic record is Collenia.
Stromatolites are a major constituent of the fossil record for about the first 3.5 billion years of life on earth, peaking about 1.25 billion years ago. They subsequently declined in abundance and diversity, which, by the start of the Cambrian, had fallen to 20% of their peak.
The most widely-supported explanation is that Stromatolite builders fell victims to grazing creatures.
Size: 12 cm x 6.5 cm
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- Nom scientifique
- Période géologique
- 2.5 Billion Years
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