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Gunflint Formation bedded chert close-up, Hwy 587 near Blende Lake, Ontario

Locality: Blende Lake, Pass Lake, Thunder Bay District, Ontario, Canada

Close-up of the bedded chert, showing a tepee structure, where the light-colored layers expanded and pushed upward due to their excess horizontal dimension. Note that the "tepee" dies out upward, and is not present at all below my wife's hand. Photograph Norman King, 2004.

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Photo added: 26th Dec 2010

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