Beautifully Preserved Knightia Fossil from Fossil Lake

Step back approximately 50 million years with this authentic Knightia eocaena Fish Fossil from the world-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 flourished millions of years before humans ever walked the 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 through warm lakes and feeding on small aquatic organisms. Closely related to modern herring and sardines, Knightia played a vital role within this thriving prehistoric ecosystem.

This authentic fossil was discovered in a working quarry near Kemmerer, Wyoming — an area internationally celebrated for producing some of the world’s finest fossil fish specimens. After the fish died, it settled gently to the quiet lakebed where it was rapidly buried beneath ultra-fine sediment. Low oxygen conditions slowed decomposition and prevented scavengers from disturbing the remains, preserving delicate skeletal structures, fins, and body details with exceptional 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 ever discovered. Fossils from this formation provide researchers with one of the most detailed records of prehistoric freshwater ecosystems on Earth, helping scientists better understand ancient climates, lake environments, and the evolution of early fish and aquatic life.

This authentic Knightia fossil is more than a collector’s specimen — it is a beautifully preserved window into the ancient lakes of the Eocene world.

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: 148mm x 98mm x 3mm Approximately
✓ FISH SIZE: 93mm x 30mm Approximately
✓ WEIGHT: 345 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 home a beautifully preserved survivor from the prehistoric lakes of Wyoming and let this extraordinary Knightia fossil become a timeless piece of Earth’s ancient freshwater history.