Green River Formation Insect and Feather Fossils Association

Bird feather with

Cf Pronophlebia redivivia (craneflies)

Insect Order Dipera, Family Limonidae

Geological Time: Middle Eocene

Size (25.4 mm = 1 inch): Craneflies fossils are 7 mm; Fossil feather is 6 mm by 4 mm on 55 mm by 80 mm matrix

Fossil Site: Green River Formation, Uintah County, utah

Code: IN28

Price: Sold

The Green River Formation deposits of Wyoming, Colorado, and Utah are best known for their immaculately-preserved fish, but other examples are known as well, as this specimen attests. This is an example of an association plaque of numerous cranefly larvae with a well-preserved feather.

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