Tag Archives: Early Earth system

Banded iron formations (BIFs) reviewed

During most of the last hundred years every car body, rebar rod in concrete, ship, bridge and skyscraper frame had its origins in vividly striped red rocks from vast open-pit mines. Comprising mainly iron oxides with some silica, these banded iron formations, or BIFs for short, occur in profitable tonnages on every continent.

This image shows a 2.1 billion years old rock ...

2.1 billion years old boulder of banded ironstone. (credit: Wikipedia)

This article can now be read in full at Earth-logs in the Sedimentology and stratigraphy archive for 2017