Iron ore is a big deal in Australia ... Although they're on land now, their story starts in the ancient oceans. BIFs are ...

2,500 mya: Banded iron formations Banded iron formations (BIFs) are sedimentary rocks deposited extensively ... primary source of today's global iron ore supply. From the 600 trillion tons of ...

But when exactly that ore from major mining deposits in ... In the Pilbara most hematite is found in spectacular layered sedimentary rock known as banded iron formations (BIF) that are most ...

The waves of colourful rock within the specimen are made up of black and red bands of iron oxide (mostly haematite and some magnetite), interspersed with lighter sedimentary rock ... the formation ...