Yellowstone NP Wyoming

Grand Cannon of Yellowstone_DSC8200

When the Old Geyser Basin was active, it caused the "cooking" of the rock which resulted in chemical alterations causing the rocks to oxidize; in effect, the canyon is rusting.

When the Old Geyser Basin was active, it caused the “cooking” of the rock which resulted in chemical alterations causing the rocks to oxidize; in effect, the canyon is rusting.

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