"One hypothesis is that the phototrophic iron oxidizers probably contributed very little to the formation of banded iron ores in later phases of the Earth's history," says Kappler. This is because ...

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 ...

Geologists in Western Australia have uncovered the largest iron ore deposit ever recorded—an astonishing 55 billion metric tons. This discovery is not just a milestone for the mining industry but a ...

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 ...

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 ...