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Knightia alta Fossil Fish – Eocene, Green River Formation, Kemmerer, Wyoming, USA
Knightia alta Fossil Fish – Eocene, Green River Formation, Kemmerer, Wyoming, USA - Image 2

Knightia alta Fossil Fish – Eocene, Green River Formation, Kemmerer, Wyoming, USA

£12.60

This listing is for a Knightia alta fossil fish, a well-preserved specimen from the Green River Formation, dating back to the Eocene Period (~50 million years ago). This fossil originates from Kemmerer, Wyoming, USA, a world-renowned site famous for its exceptional fossil preservation.

Fossil Information:

  • Species: Knightia alta
  • Common Name: Fossil Herring
  • Fossil Type: Complete fish fossil
  • Geological Formation: Green River Formation
  • Age: ~50 million years old (Eocene Period)
  • Location: Kemmerer, Wyoming, USA
  • Size: See scale reference in photos
  • Preservation: Naturally untreated, with excellent detail

Key Features:

✔ 100% genuine and naturally preserved specimen

✔ Fine detail of scales, fins, and body structure

✔ Distinctive dark fossil contrast against light limestone matrix

✔ Highly collectible—ideal for display, study, or a unique gift

Authenticity & Certification:

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. The specimen shown in the photos is the exact fossil you will receive.

About Knightia alta & Its Significance:

Knightia alta is an extinct species of herring-like fish that thrived in the Eocene freshwater lakes of North America. It is closely related to modern sardines and herrings, with a small, elongated body, densely packed scales, and distinctive fin placement.

The Green River Formation is world-famous for its exceptionally well-preserved fossils, which formed in ancient lakes around 50 million years ago. These fine-grained limestone deposits created ideal conditions for fossilisation, preserving fish with stunning anatomical detail.

Why Buy From Us?

This Knightia alta fossil is part of the Alice Purnell Collection, one of the largest and most respected fossil collections in the world. We specialise in museum-quality fossils, making this a perfect piece for collectors, educators, and researchers.

A stunning, naturally preserved Eocene fish fossil—own a genuine Knightia alta fossil from the Green River Formation today!

(Actual as seen)

Out of stock

SKU: AF0388 Category:

Description

This listing is for a Knightia alta fossil fish, a well-preserved specimen from the Green River Formation, dating back to the Eocene Period (~50 million years ago). This fossil originates from Kemmerer, Wyoming, USA, a world-renowned site famous for its exceptional fossil preservation.

Fossil Information:

  • Species: Knightia alta
  • Common Name: Fossil Herring
  • Fossil Type: Complete fish fossil
  • Geological Formation: Green River Formation
  • Age: ~50 million years old (Eocene Period)
  • Location: Kemmerer, Wyoming, USA
  • Size: See scale reference in photos
  • Preservation: Naturally untreated, with excellent detail

Key Features:

✔ 100% genuine and naturally preserved specimen

✔ Fine detail of scales, fins, and body structure

✔ Distinctive dark fossil contrast against light limestone matrix

✔ Highly collectible—ideal for display, study, or a unique gift

Authenticity & Certification:

All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. The specimen shown in the photos is the exact fossil you will receive.

About Knightia alta & Its Significance:

Knightia alta is an extinct species of herring-like fish that thrived in the Eocene freshwater lakes of North America. It is closely related to modern sardines and herrings, with a small, elongated body, densely packed scales, and distinctive fin placement.

The Green River Formation is world-famous for its exceptionally well-preserved fossils, which formed in ancient lakes around 50 million years ago. These fine-grained limestone deposits created ideal conditions for fossilisation, preserving fish with stunning anatomical detail.

Why Buy From Us?

This Knightia alta fossil is part of the Alice Purnell Collection, one of the largest and most respected fossil collections in the world. We specialise in museum-quality fossils, making this a perfect piece for collectors, educators, and researchers.

A stunning, naturally preserved Eocene fish fossil—own a genuine Knightia alta fossil from the Green River Formation today!

Additional information

Era

Eocene
Origin

USA

Eocene Information

The Eocene Period (56–33.9 million years ago) was a time of warm global temperatures and the rapid evolution of mammals following the extinction of the dinosaurs. The climate was hot and humid, with lush rainforests covering much of the planet, even near the poles. Mammals diversified into new ecological roles, with early primates, whales (like Basilosaurus), large herbivores, and carnivores emerging. Birds and reptiles also thrived, and the first grasses began spreading, setting the stage for later grassland ecosystems. By the late Eocene, the Earth’s climate cooled significantly, leading to the formation of the first Antarctic ice sheets and the eventual transition to the drier, cooler Oligocene Period.

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