Twin Eocene Marsh Fly Fossils from Green River Black Onyx Sourced from the mineral-rich pegmatites

Sourced from the mineral-rich pegmatites of the Erongo Region

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Twin Eocene Marsh Fly Fossils from Green River Black Onyx Sourced from the mineral-rich pegmatitesIt 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