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| Knightia Fish Plaques starting at $13.99 |
Knightia
fish (Knightia eocaena) belong to the
family Clupeidae, which includes herring and sardines. Found in large quantities in the lacustrine
sediments of what is now known as the Green River Formation, Knightia fish are
well-preserved due to a slowed decomposition with the lack of oxygen at the
cold lake bottoms.
The green
river formation is a group of sedimentation records from multiple intermountain
lakes in three basins around what is now the Green River in Wyoming, Utah, and
Colorado, USA. One of the best know
fossil locations is Fossil Butte National Monument, which is part of the Fossil
Lake Formation and highly prized for the abundance of well-preserved fossils.
These small
schooling fish rarely reach 10 inches in length and ate mainly plankton and diatoms,
but were a good food source for larger predators of the Eocene epoch, lasting approximately
56 to 34 million years ago.
By Amanda Rice
By Amanda Rice
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