Knightia Green River Fish
Great display piece
Close up of detail
A very good specimen of the fossil fish, Knightia, discovered in the Green River Formation, Wyoming, USA.
The fossil dates from the Eocene, and is 50 million years old.
50 million years ago a lake existed in what is now Wyoming, with a size of around 930 square miles. The unusual chemistry of the lake prevented decay and the scavenging of the dead organisms, while thin layers of alternating limestone and organic matter slowly accumulated. The resulting limestone beds contain the highest concentration of fossilised fish in the world.
Knightia were common, and were unfortunate enough to be the prey of most of the other fish that existed at that time.
A nice display item.
The fish is displayed in the centre of the limestone plate.
Plate size: 15cms x 15cms
Fish: 14cms long