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 ...

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 ...

This region is renowned for its unique geological formations ... and agate geodes exhibited distinct mineralogical characteristics, with variations in the abundance of elements such as iron ...