Knightia Mass Mortality Plate - 19x13"

This is a beautiful mass mortality plate of the fossil fish Knightia eocaena from the Green River Formation of Wyoming. There 17 complete or mostly complete example of this fossil herring. The specimens are wonderfully detailed with scales and fins easily seen. Most of the fish average about 3 1/2" and the entire slab of rock is 19" by 13". The rock is very solid, just over an inch thick and would look great on either a large stand, or wall mounted. We can back it with wood to make it easier to mount for no additional charge upon request.

About Knightia

Knightia is an extinct genus of small, schooling, ray-finned fish related to modern herrings and sardines. Abundant in the warm freshwater lakes of the Eocene Green River Formation, they fed on insects, plankton, and tiny fish, while serving as prey for nearly every larger predator in the ecosystem. The most common species, Knightia eocena, reached about 15 cm in length and is celebrated today as the state fossil of Wyoming.

These streamlined fish are recognized by their heavy scales, small conical teeth, and rows of dorsal and ventral scutes along the body. Their fossils are among the most iconic from the Green River Formation—an exceptional 48-million-year-old lake deposit in Wyoming, Colorado, and Utah known for preserving a remarkably detailed snapshot of ancient life in a warm, lake-rich Eocene landscape.

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