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Grace [21]
3 years ago
14

The layered structures made of calcium carbonate by precambrian cyanobacteria are called _____.

Chemistry
2 answers:
Valentin [98]3 years ago
7 0
<span>stromatolites I think
</span>
Misha Larkins [42]3 years ago
6 0

Im pretty sure its Trilobites man.

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