Stromatolite fossils that formed 3.5 billion years ago indicate that _____.

1 answer:

7 0

Stromatolite fossils are the oldest known fossils, that formed 3.5 billion years ago when the environments of Earth were too hostile to support life as we know it today. They are layered mounds, columns, and sheet-like sedimentary rocks
Stromatolite fossils indicate that life must have arisen quite a bit earlier, perhaps 3.9 billion years ago.

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