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  • Banded iron formation Z system
  • Banded iron formations (BIFs) contain well developed iron-rich thin alternating layers or laminations as seen here. This formation occurs due to the lack of burrowing species in the Precambrian period in which this sedimentary rock was created. The name comes from the various coloured layers.
  • Single grain of sand, SEM
  • Banded iron formations (BIFs) contain well developed iron-rich thin alternating layers or laminations as seen here. This formation occurs due to the lack of burrowing species in the Precambrian period in which this sedimentary rock was created. The name comes from the various coloured layers.
  • Diatoms hidden inside a grain of sand, SEM