SKU:S965
Small Eocene Marsh Fly Fossil – Green River Formation
Small Eocene Marsh Fly Fossil – Green River Formation
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Preserved for approximately 51 million years, this authentic Marsh Fly (Plecia pealei) fossil captures a remarkable moment from the Eocene Epoch. Delicately preserved within fine-grained limestone from Wyoming's world-famous Green River Formation, the fossil reveals the compact body, wings, and antennae of an insect that once thrived in a warm, subtropical environment.
Specimen Details
✓ Species: Plecia pealei (Marsh Fly)
✓ Age: Eocene Epoch, approximately 51 million years old
✓ Location: Kemmerer, Wyoming, USA
✓ Formation: Green River Formation
✓ Specimen Size: 48 × 43 × 7 mm (approximately)
✓ Fly Size: 10 × 9 mm
✓ Weight: 26 grams
The Green River Formation is one of the finest fossil lagerstätten in the world, preserving an ancient lake ecosystem with extraordinary detail. Fine sediments settled gently to the lake floor, rapidly burying insects, fish, plants, and other organisms, allowing even delicate creatures such as flies to survive as fossils for millions of years.
Marsh flies were abundant around the lush forests and freshwater lakes of Eocene North America. They formed an important part of the ecosystem, serving as pollinators and as a food source for fish, birds, amphibians, and reptiles. Fossils like this provide valuable insight into the biodiversity and climate of a world that existed long before humans.
Whether displayed as a conversation piece or added to a growing fossil collection, this authentic Marsh Fly fossil is a fascinating window into prehistoric life and an excellent specimen from one of the world's most famous fossil localities.
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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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