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Banded iron formation

earth science Maturity 7-9

These rocks have many stripes.

MichiganBIF.jpg
MichiganBIF.jpg
They are made of iron. The stripes show how the sea changed. Long ago, tiny life made air. This made the iron sink. Now we use this iron.
Black-band ironstone (aka).jpg
Black-band ironstone (aka).jpg
Can you see the lines?

42 words
🖼️ Images & Media (14)
File:Black-band ironstone (aka).jpg
Black-band ironstone (aka).jpg
File:Banded Iron Formation Barberton.jpg
Banded Iron Formation Barberton.jpg
File:MichiganBIF.jpg
MichiganBIF.jpg
File:Rapitan BIF south australia.jpg
Rapitan BIF south australia.jpg
File:Bif in time.jpg
Bif in time.jpg
File:Iron banding 01.jpg
Iron banding 01.jpg
File:BlackSmoker.jpg
BlackSmoker.jpg
File:CSIRO ScienceImage 4203 A bluegreen algae species Cylindrospermum sp under magnification.jpg
CSIRO ScienceImage 4203 A bluegreen algae...
File:Iron bacteria burn.JPG
Iron bacteria burn.JPG
File:Oxygenation-atm-2.svg
Oxygenation-atm-2.svg
File:Jaspilite banded iron formation, Soudan Underground State Park.jpg
Jaspilite banded iron formation, Soudan...
File:Hull–Rust–Mahoning Open Pit Iron Mine.jpg
Hull–Rust–Mahoning Open Pit Iron Mine.jpg

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📚 Content adapted from Wikipedia | Readability: FK 14.0 | Vital Level 5