Banded Iron Formation

A nearly 3-billion-year-old banded iron formation from Canada shows that the atmosphere and ocean once had no oxygen. 

Ficheiro:Jaspilite banded iron formation (Soudan Iron-Formation

Banded Iron — Articles — Michigan Rockhounds

NASA Astrobiology Institute

BANDED IRON FORMATIONS (BIFs)

Banded Iron Formation

File:Glacially eroded jaspilite banded iron formation outcrop

File:Banded iron formation (Goldman Meadows Formation, Mesoarchean; Atlantic City Iron Mine, South Pass, Wyoming, USA) 1 (30749232474).jpg - Wikimedia Commons

A: Commonly observed banded iron formation (BIF) alteration stages

Faulted jaspilite banded iron formation (BIF) (Hamersely G…

Banded iron formation hi-res stock photography and images - Alamy

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