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banded iron formation
(redirected from Banded-Iron Formation)

    Also found in: Wikipedia 0.01 sec.
banded iron formation [¦band·əd ′ī·ərn fȯr‚mā·shən]
(geology)
A sedimentary mineral deposit consisting of alternate silica-rich (chert or quartz) and iron-rich layers formed 2.5-3.5 billion years ago; the major source of iron ore.
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The researchers, led by Kurt Konhauser of the University of Alberta in Edmonton, analyzed the trace element composition of sedimentary rocks known as banded-iron formations, or BIFs, from dozens of different localities around the world, ranging in age from 3,800 to 550 million years.
"Great Oxidation Event" may be a result of nickel famine 2.4 billion ... by Asian News International
 
 
 
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