A Banded Iron-Formation (BIF) with bands of iron-oxide (black) and quartz (white) that were deposited at the seafloor some 2700 million years ago.

Banded iron formations studied by the authors showing the alternation between iron-rich (red) and silica-rick (white) layers. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy ...

The banded iron formation, located in western China, has been conclusively dated as Cambrian in age. Approximately 527 million years old, this formation is young by comparison to the majority of ...

Called banded iron formations or BIFs, these ancient rocks formed between 3.8 and 1.7 billion years ago at what was then the bottom of the ocean.

At 2.5 billion years old and weighing in at 2.5 tonnes, the banded iron formation is so heavy that Museum engineers had to reinforce the floor underneath it in Hintze Hall. 'The rock tells a ...

Metamorphosed banded iron formation from southern Wyoming showing deformation and folding. The rock is approximately 2.7 billion years old. Dark bands are iron oxides (magnetite, hematite) and ...

This gorge cuts through the largest known banded iron formation in the world: the 2.46-billion-year-old, 300-m-thick Joffre Member of the Brockman Iron Formation.

Correlation between large igneous province activity and the ages of banded iron formations suggests that the latter may have facilitated mantle plume upwelling in the Archean and Proterozoic Earth ...

Rare banded iron formation in WA. Dated at 2.6 billion years old, the Helena and Aurora Range is part of the Great Western Woodlands, about 100km north-east of Southern Cross, WA. It is one of the ...