weekly-photo-challenge – Earth

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

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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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