monica
Süžeeskeem Tekst
- Earths Formation
- Date of event:4.6 billion years ago
- Early Life On Earth
- 4 - bya
- Oldest stromatolites from cyanobacteria
- Stromatolites are layered bio chemicals that form and used to lived in shallow water environments.
- Stromatolites
- Banded iron formations - 3 bya
- Banded iron formations are rocks of sediment and they are usually older than 1.7 billion years ago.
- Multicellular life- 600 million years ago
- Multicellular life - are organisms that contain multiple different cells.
- Cambrian explosion - 541 mya
- 541 million years ago, the explosion lasted for 13---25 million years ago.
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