SKU:S972
Green River Eocene Marsh Fly Fossil Specimen
Green River Eocene Marsh Fly Fossil Specimen
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Delicate insect wings are among the most difficult features to survive the passage of time, making this authentic Marsh Fly (Plecia pealei) an especially captivating fossil. Preserved for approximately 51 million years, it offers a remarkable glimpse into the vibrant wetlands and forests that covered Wyoming during the Eocene Epoch.
Specimen Details
✓ Species: Plecia pealei (Marsh Fly)
✓ Age: Eocene (~51 million years old)
✓ Formation: Green River Formation
✓ Location: Kemmerer, Wyoming, USA
✓ Specimen Size: Approximately 51 × 42 × 8 mm
✓ Fly Size: Approximately 14 × 11 mm
✓ Weight: 26 g
✓ Authenticity: 100% Authentic natural fossil
✓ Display: Excellent collector, educational, or gift specimen
Recovered from the renowned Green River Formation, this fossil comes from one of the world's most extraordinary fossil deposits. During the Eocene Epoch, a chain of calm freshwater lakes spread across what is now southwestern Wyoming. Fine layers of sediment slowly settled onto the lake floor, gently burying insects, fish, plants, and other organisms before they could decompose. Over millions of years, these sediments became limestone, preserving an exceptional record of prehistoric life.
Today, the Green River Formation is recognised internationally for the quality of its fossils, providing scientists with an unparalleled window into an ancient freshwater ecosystem. While its beautifully preserved fish fossils are the most famous discoveries, insect fossils such as Plecia pealei are far less common and reveal the rich diversity of life that thrived around these ancient lakes.
The beautifully preserved wings of this Marsh Fly make it an eye-catching collector's specimen and a tangible connection to a world that existed long before modern landscapes took shape. Whether displayed in a collection, used for education, or given as a memorable gift, it is an authentic piece of Earth's remarkable history.
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Before You Add to Cart ✨
Before You Add to Cart ✨
Online Only: This exact piece is available online only. Similar pieces may be available in store so please check with us before you visit Forever Gems in Franschhoek. Want to view it in-store? Just ask — we’ll arrange it.
Photos: We shoot for accuracy, but colors may vary slightly by screen or lighting.
Size & Weight: Full details are in the description. Please check before buying.
What You See Is What You Get: The item pictured is the exact piece you’ll receive.
Authenticity Guaranteed 🛡️
Authenticity Guaranteed 🛡️
Every specimen at Forever Gems is personally hand-selected and verified. We source exclusively from trusted IMCA-registered dealers, artisanal miners, and long-standing partners we meet with annually at the Tucson Gem and Mineral Show.
Any replica or reproduction fossils are always clearly labeled and sold separately.
Lifetime Authenticity Guarantee
We stand behind the authenticity of every fossil we sell. If a fossil purchased from Forever Gems can be scientifically proven not to be authentic, it may be returned at any time for a full refund, provided supporting proof is supplied. This lifetime authenticity guarantee is in addition to our standard 30-day return policy.
Rather than paper certificates, we rely on over 13 years of experience, expert knowledge, and trusted supplier relationships to ensure authenticity and quality.
Shipping & Collection 🚚
Shipping & Collection 🚚
We ship nationwide with The Courier Guy and RAM Hand-to-Hand Couriers primarily and worldwide with FedEx. Tracking provided on all orders.
Local pickup: Wellington by appointment, Franschhoek Store Fri–Sun, or Franschhoek Village Market Saturdays (weather permitting).
Own courier: We’ll notify you when ready for collection from Wellington, SA.
International: Shipping options show at checkout. Duties/taxes, if any, are paid by the buyer.
All specimens are securely packaged to arrive safely. Questions? Contact us
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