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Green River fossil fish

Eocene rocks record Green River lake and shoreline sediments.

The Green River Formation preserves an entire fossil ecosystem in exquisite detail, and the fish are no exception.

Paleontologists have discovered numerous species from huge predatory fish to tiny herbivores. 

Many of these fish are extinct relatives of living groups, found throughout the world today in fresh and salty bodies of water.

Canyon Wall
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Green River fossil fish
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