Twin Eocene Marsh Fly Fossils from Green River Black Onyx Libyan Desert Glass owes its

Libyan Desert Glass owes its existence to a catastrophic cosmic event

Fossil Remnant of the Thunder Beasts — Megacerops Bone

and other large marine animals

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Twin Eocene Marsh Fly Fossils from Green River Black Onyx Libyan Desert Glass owes itsIt is rare enough to discover a single insect preserved for millions of yearsbut finding two Marsh Flies (Plecia pealei) preserved on the same stone is a truly fascinating glimpse into the distant past. These insects lived approximately 51 million years ago, when warm forests and tranquil freshwater lakes covered what is now southwestern Wyoming during the Eocene Epoch. Specimen Details Species: Plecia pealei (Marsh Fly) Age: Eocene (~51 million years