SKU:S971
Eocene Marsh Fly Fossil from Green River Formation
Eocene Marsh Fly Fossil from Green River Formation
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Few fossils capture a fleeting moment in Earth's history quite like fossil insects. This authentic Marsh Fly (Plecia pealei) is beautifully preserved in fine-grained limestone from Wyoming's famous Green River Formation, revealing delicate wings, slender legs, and the unmistakable body shape of an insect that lived approximately 51 million years ago during the Eocene Epoch.
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 × 35 × 8 mm (approximately)
✓ Fly Size: 16 × 13 mm
✓ Weight: 21 grams
The Green River Formation is one of the world's most celebrated fossil deposits, preserving an ancient subtropical ecosystem in remarkable detail. Calm lake waters and exceptionally fine sediments allowed insects, fish, plants, birds, and reptiles to be fossilised with extraordinary clarity. This specimen offers a fascinating glimpse into an ecosystem that flourished long before humans appeared.
Marsh flies were common inhabitants of the warm, humid forests surrounding these ancient lakes. Their abundance made them an important part of the food web, serving as prey for fish, birds, reptiles, and other insects. Today, their fossils help palaeontologists understand the climate, biodiversity, and ecological relationships of North America during the Eocene.
Compact, well-preserved, and rich in scientific interest, this genuine Marsh Fly fossil is an excellent addition to any fossil collection. It is ideal for collectors, educators, and anyone fascinated by prehistoric life, offering an authentic connection to a world that existed more than fifty million years ago.
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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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