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 ...

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 ...

2,500 mya: Banded iron formations Banded iron formations (BIFs) are sedimentary rocks deposited extensively on the ocean floor over hundreds of millions of years. Their alternating rust- and gray ...

The unprecedented scale of this deposit forces a reassessment of traditional models of banded iron formation (BIF) genesis. The data suggest a stronger influence of tectonic activity and climatic ...