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About 50 million years ago this fish swam in a fresh water lake located in Southwestern Wyoming.

When the fish died it sank to the bottom of the lake where it was quickly buried. The soft sediments encased the fish and, over time as the rock hardened, the skeleton was preserved.

This specimen was excavated from the hillside and additional careful work has resulted in capturing a piece of Wyoming's geological past. 

Label included


Species: Diplomystus
Age: Eocene (50 million years old) 
Formation: Green River Formation
Locality: Lincoln County, Wyoming


Plate: 6.88 x 5 x .5 inches
Specimen: 4.75 x 1.75 inches
Weight: ~ 1 lb.

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