The Green River Formation is famous for the many fish, birds, and mammal species immaculately preserved in the fine lakebed sediment, but perhaps more impressively, that fine grain sediment was also perfect for preserving the many insects that made these ancient lakes their home. Among the insects found are flies, crickets, dragonflies, beetles, and more. Some of these specimens are so well preserved, patterns and pigments can be seen in the fossils themselves.
The Green River Formation is famous for the many fish, birds, and mammal species immaculately preserved in the fine lakebed sediment, but perhaps more impressively, that fine grain sediment was also perfect for preserving the many insects that made these ancient lakes their home. Among the insects found are flies, crickets, dragonflies, beetles, and more. Some of these specimens are so well preserved, patterns and pigments can be seen in the fossils themselves.