weekly-photo-challenge – Earth

Not normally seen under the surface of forest and farmers’ fields, the Cheltenham Badlands reveals the earth below your feet.


The predominance of iron oxide in the shale that makes up the Queenston Shale formation – a huge wedge-shaped, 300m thick section of earth created during the Ordovician Period stretching from Western New York to Ontario’s Bruce Peninsula – makes the earth red. The greenish bands in the shale are due to ground water changing the red iron oxide to green iron oxide.

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