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Evidence of an oxygen-rich atmosphere is the presence of A cyanobacteria B. trace fossils C. banded iron formations D. stromatolites

Evidence of an oxygen-rich atmosphere is the presence of A cyanobacteria B. trace fossils C. banded iron formations D. stromatolites
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Evidence of an oxygen-rich atmosphere is the presence of

A cyanobacteria
B. trace fossils
C. banded iron formations
D. stromatolites

asked
User Zenith
by
8.6k points

2 Answers

2 votes
I Believe it to be Stromatolites
answered
User Sebastian Inones
by
7.8k points
1 vote
Stromatolites is the answer
answered
User Ealhad
by
8.3k points
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