Banded iron formations: Oceans, algae and iron oxide
Iron ore is a big deal in Australia ... Although they're on land now, their story starts in the ancient oceans. BIFs are ...
PBS7y
Deep Time
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 ...
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Space Rock or Not? Rocks That Look Like Meteorites
Take Our A-Z-Animals Rocks and Minerals Quiz The mineral magnetite is iron ore and ferrimagnetic ... a soft, brown, sedimentary rock. Jet is a mineraloid derived from wood and transformed under ...
Natural History Museum%2c London3y
The heavy metal rock bands charting life on early Earth
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 ...