Eocene Period- C. 50 Million Years Ago

Order to which the fossil belongs: Clupeifomes
Name of which the family belongs: Clupeidae

The Knightia fish comes from one of the world’s famous Laggerstatten, the Green River Formation in Wyoming, USA. It is the unusual chemistry of fossil lake that prevented decay and scavenging of dead organisms while layers of limestone matter slowly accumulated.

Good definition of the Knightia fish on a matrix of sub-oolitic limestone.

Matrix: 80mm x 95mm length
Knightia: 65mm length