Before free oxygen gas became abundant in the oceans and atmosphere, it reacted with a metal and produced what type of formations?
the ionosphere
the ozone layer
banded iron formations
stromatolites
Before free oxygen gas became abundant in the oceans and atmosphere, it reacted with a metal and produced
banded iron formations.
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Asked 11/17/2015 8:05:39 AM
Updated 11/17/2015 8:21:13 AM
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