Knightia Fish Plaque - Mutiple Specimens

Plaque
18"/45.9cm - 20"/51cm diameter

Largest Fish
4"/10cm long

Weight
4.5Kg



 Free Post to Mainland UK 
 

Description

Multi specimen Knightia Alta sp. Fish plaque, the fish very distinctly displayed in the plate. A unique insight into the aquatic Eocene Period.

Genus

Knightia Alta sp.

Other Nomenclature

Herring

Location

Fossil Butte region, Green River Formation, Fossil Lake, Lincoln county, 18 inch layer, Kemmerer, Wyoming, U.S.

Geological Age

Tertiary Period [Palaeocene], Eocene Epoch 54-38 mya

Condition report

This is an acid prep plate, therefore sympathetically exposed over a long period of time, degree by degree, the details of the once swimming fish brought to life out of the limestone rock bed. Excellent [herring family] fish, from fossil Butte formation, in terms of its size, skeletal detail [vertebrae], soft tissue [scales], and preparation. The plate now block backed [about 1.75 inch/40mm],giving a greater depth look - 'off wall' and with a convenient hanging system. Block backing

Fossil Lake History

The Green River Formation represents one of the largest documented accumulations of sedimentary rock in the world and dates back 50 million years. It covers an area of more than 25,000 square miles and averages about 2000 feet in thickness. These lakes were formed by geologic events that uplifted the Rocky Mountains in early times. The climate was much different than the desert like climate of today. It was similar to the present climate of the Mediterranean (subtropical) and more southerly climates. The first record of a fossil fish discovered in the Green River Formation was in 1856 during railroad excavations. at an altitude of 7200 ft this harsh area has been commercially mined since the late 1800s.