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Nature 396, 414 (3 December 1998) | doi:10.1038/24736
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Ocean chemistry: Iron and brimstone
Philip Newton
Spectacular layered sedimentary rocks, such as those pictured here from the Hamersley Basin of Western Australia, are a widespread yet episodic feature of the Precambrian geological landscape. These 'banded iron formations' — the colouring is largely due to variable iron content — were laid down from an iron-rich ocean.
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