0.4" Detailed Fossil March Fly Insect Green River FM Uintah County UT Eocene Age

Location: Uintah County, Utah Weight: 0.5 Ounces Dimensions: 1.5 Inches Long, 1.4 Inches Wide, 0.2 Inches Thick (Plate) Insect Dimensions: 0.4 Inches Long, 0.3 Inches Wide The item pictured is the one you will receive. This is a genuine fossil. 50 million years old Eocene age March Fly Insect Fifty million years ago ancient Fossil Lake existed in what is now southwest Wyoming.  Of its estimated maximum extent of 930 square miles, approximately 500 square miles of sediment remains.  The 230 square miles across the center of the ancient lake-bed contain exceptionally fossiliferous sediments and associated geologic features including deltas, beaches, springs, and rocks from the center and nearshore environments.  The unusual chemistry of the fossil lake prevented the decay and scavenging of dead organisms while millimeter-thick layers of alternating limestone matter slowly accumulated.  The result is laminated limestones that contain the highest concentration of fossil fish in the world.