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4.35 in Knightia eocaena Fossil Fish Green River - Wyoming

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4.35 in Knightia eocaena Fossil Fish Green River - Wyoming

Availability: In stock

Knightia eocaena (Jordan, 1907)

Green River Formation - 50 Million years old
Kemmerer, Wyoming, USA

Knightia : 4.35 in.
Matrix : 5.3 x 4.2 in.
(1 inch = 2.54 cm)

A large a well preserved Knightia (Herring/Sardine) with scales and a rich deep color.

This specimen was collected by us in the late fall of 2016, and painstakingly prepared.

It is 100% as found and has no restoration, with our personal guarantee!

This is also Wyoming's state fossil!



The Green River Formation in Wyoming is one of the most famous and important Eocene (50-45 million years old) sites in the world. It provides a glimpse of the daily life surrounding the great Fossil Lake. From the prolific fossil fish deposits, the Green River Formation is also famous for it's insect, mammal, and even plant fossils! The formation exposes itself from southern Wyoming and into Utah and Colorado and shows us how life was more temperate at that time, often 60-70 degrees Fahrenheit. An exciting and dramatic difference to the climate in modern day Wyoming.