Colorado Fossil Insects



This is an Great Block of a Green River Insect. This is a March Fly and beetle along with several other insects trapped in the layers of rock well known from a classic site. The preservation and detail is exquisite.

These Colorado Fossil Insects are Eocene in age, and are 50 Million years old. They come from the Green River Formation.

This formation is known for the insect fossils and leaves coming from that area and this Colorado Fossil Insects block contains one March Fly and one Beetle. The fossilization is exceptional for these small invertebrates. These are not trapped in Amber but they are locked inside rock. This rock is a vert fine grained sediment that preserved these insects beautifully and they display very well.

Because these Colorado Fossil Insects were trapped in mud or a mud flow and were buried very quickly. But they did not completely decay immediately. Because they were preserved in that fine mud and exhibit great detail. The Green River is known for the excellent preservation of fossils but here they are quite small.

The photograph in the frame is an enlargement of the actual insect inside the case and this is the specimen you will receive. These Colorado Fossil Insects come complete in this Glass Topped leatherette collectors case 6 x 8 inches