0.7 Detailed Fossil March Fly Insect Green River FM Uintah County UT Eocene Age
Location: Uintah County, Utah
Weight: 0.9 Ounces
Dimensions: 2.1 Inches Long, 1.5 Inches Wide, 0.4 Inches Thick (Plate)
Insect Dimensions: 0.7 Inches Long, 0.4 Inches Wide
The item pictured is the one you will receive.
50 million years old, Eocene age
March Fly Insect
This remarkable specimen originates from Fossil Lake, an ancient body of water that flourished in southwestern Wyoming approximately 50 million years ago during the Eocene epoch. The lake once covered an impressive 930 square miles, with about 500 square miles of sedimentary deposits still preserved today. The most fossil-rich zone spans the central 230 square miles, where unique chemical conditions created an ideal environment for fossilization by preventing organic decay and allowing delicate limestone layers to accumulate gradually. These laminated deposits contain the world's richest assemblage of Paleogene freshwater fish fossils, complemented by an astonishingly complete record of ancient life. Beyond the aquatic realm, the site preserves an entire ecosystem—from microscopic cyanobacteria and over 325 plant species to insects, crustaceans, amphibians, reptiles, and early mammals, including primitive horses, bats, and carnivores. Excavations beginning in the 1870s have consistently yielded exquisitely preserved specimens, making Fossil Lake an unparalleled window into Eocene freshwater environments and the diverse life they supported.
