SKU:S967
Eocene Marsh Fly Fossil in Green River Limestone
Eocene Marsh Fly Fossil in Green River Limestone
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Imagine a warm Eocene morning over 51 million years ago, where dragonflies, marsh flies, turtles, crocodiles, and early mammals thrived around the calm freshwater lakes of what is now Kemmerer, Wyoming. This authentic Marsh Fly (Plecia pealei) is a remarkable survivor from that long-lost world, preserved as a snapshot of prehistoric life.
Specimen Details
✓ Species: Plecia pealei (Marsh Fly)
✓ Age: Eocene (~51 million years old)
✓ Formation: Green River Formation
✓ Location: Kemmerer, Wyoming, USA
✓ Specimen Size: Approximately 44 × 38 × 9 mm
✓ Fly Size: Approximately 10 × 17 mm
✓ Weight: 23 g
✓ Authenticity: 100% Authentic natural fossil
✓ Display: Excellent collector, educational, or gift specimen
This genuine fossil comes from the world-renowned Green River Formation, one of the most important fossil sites on Earth. During the Eocene Epoch, peaceful freshwater lakes covered much of this region. Fine layers of sediment settled quietly to the lake floor, gently entombing insects, fish, leaves, and other organisms before they could decompose. Over millions of years, these sediments transformed into fine-grained limestone, preserving extraordinary details that continue to amaze scientists and collectors alike.
Today, the Green River Formation is celebrated for its exceptional fossil preservation, offering one of the clearest windows into life shortly after the age of the dinosaurs. Although fossil fish are its most famous discoveries, beautifully preserved insect fossils such as Plecia pealei are considerably less common and provide valuable evidence of the thriving insect populations that once filled these ancient forests and wetlands.
The spread of this Marsh Fly's delicate wings captures a fleeting moment from an ecosystem that vanished millions of years ago. Its graceful preservation makes it an eye-catching addition to any fossil collection and a fascinating conversation piece for anyone with an appreciation for natural history, evolution, and the remarkable story of life on Earth.
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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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