The layers you see in this image were once iron-rich and silica-rich sediments that settled on an ancient sea floor 2.7–2.4 billion years ago. Credit: The Australian Museum The layers you see in this ...
An example of the 3.7 billion year old banded iron formation that is found in the northeastern part of the Isua Supracrustal Belt. Credit: Claire Nichols. The image can be used for editorial purposes ...
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