Natural Limestone Knightia Fish Fossil – Kemmerer, Wyoming

Step back approximately 50 million years with this authentic Knightia eocaena Fish Fossil from the famous Green River Formation near Kemmerer, Wyoming. Dating to the Eocene Epoch, this beautifully preserved fossil captures a remarkable moment from an ancient freshwater ecosystem that existed millions of years before humans ever appeared on Earth.

During the Eocene, the Green River region was covered by vast subtropical lakes surrounded by lush vegetation and abundant wildlife. Knightia was one of the most common fish species inhabiting these calm freshwater waters, swimming in large schools and feeding on small aquatic organisms. Closely related to modern herring and sardines, Knightia played an important role within this thriving prehistoric lake ecosystem.

This authentic fossil was discovered in a working quarry approximately 20km from Kemmerer, Wyoming — an area internationally recognised for producing some of the world’s finest fossil fish specimens. After the fish died, it drifted gently to the calm lakebed where it was rapidly buried beneath ultra-fine sediment. Low oxygen conditions prevented decay and disturbance, preserving delicate skeletal structures and body details with extraordinary clarity.

Over millions of years, these sediments compressed and hardened into the fine-grained limestone that made the Green River Formation one of the most scientifically important fossil localities on Earth. Fossils from this formation provide researchers with an incredibly detailed record of prehistoric freshwater ecosystems, helping scientists better understand ancient climates, lake environments, and the evolution of early fish species.

This authentic Knightia fossil is more than a collector’s specimen — it is a genuine snapshot of prehistoric freshwater life preserved in stone for millions of years.

The Details You Need — Forever Gems Fossil Facts

✓ SPECIMEN: Fossil Fish
✓ SPECIES: Knightia eocaena
✓ AGE: Eocene Epoch (Approx. 50 Million Years Old)
✓ FORMATION: Green River Formation
✓ LOCATION: Near Kemmerer, Wyoming, USA
✓ SPECIMEN SIZE: 130mm x 91mm x 7mm Approximately
✓ FISH SIZE: 57mm x 18mm Approximately
✓ WEIGHT: 155 grams
✓ PRESERVATION: Natural fossil fish preserved in fine-grained limestone
✓ AUTHENTICITY: Genuine prehistoric freshwater fossil specimen
✓ DISPLAY: Ideal for fossil collections, educational displays, and natural history décor

Bring the ancient lakes of the Eocene into your collection and secure this beautifully preserved Knightia fossil before it disappears into another collection forever.