SKU:S973
Ancient Marsh Fly Fossil from Green River Eocene
Ancient Marsh Fly Fossil from Green River Eocene
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This authentic Marsh Fly (Plecia pealei) lived approximately 51 million years ago, when the lakes and forests of the Eocene Epoch teemed with life. Although incredibly delicate, it escaped decay through a remarkable series of natural events, allowing it to survive as a fossil and carry its story across millions of years.
Specimen Details
✓ Species: Plecia pealei (Marsh Fly)
✓ Age: Eocene (~51 million years old)
✓ Formation: Green River Formation
✓ Location: Kemmerer, Wyoming, USA
✓ Specimen Size: Approximately 52 × 46 × 6 mm
✓ Fly Size: Approximately 8 × 13 mm
✓ Weight: 18 g
✓ Authenticity: 100% Authentic natural fossil
✓ Display: Excellent collector, educational, or gift specimen
Recovered from the world-renowned Green River Formation, this fossil comes from one of the most important fossil deposits on Earth. During the Eocene Epoch, a network of calm freshwater lakes covered much of this region. Fine sediment settled continuously to the lake floor, gently enveloping insects, fish, leaves, and other organisms before they could decompose. Over millions of years, these sediments transformed into fine-grained limestone, preserving remarkable details of ancient life.
Today, the Green River Formation is recognised as one of the finest windows into prehistoric ecosystems. Its fossils reveal an extraordinary variety of life that flourished after the extinction of the dinosaurs, helping scientists understand the evolution of plants, insects, fish, reptiles, birds, and mammals. While fossil fish are the formation's best-known treasures, insect fossils such as Plecia pealei are much less common and are highly prized by collectors for their beauty and scientific significance.
This beautifully preserved Marsh Fly is a genuine piece of Earth's distant past. Whether you're adding to a fossil collection, inspiring curiosity about natural history, or searching for a truly unique gift, it is a fascinating reminder that even the smallest creatures can leave an extraordinary legacy.
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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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