SKU:S966
Marsh Fly Fossil (Plecia pealei) in Green River Limestone
Marsh Fly Fossil (Plecia pealei) in Green River Limestone
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Travel back approximately 51 million years to the lush subtropical forests of the Eocene Epoch, when this delicate Marsh Fly (Plecia pealei) lived alongside crocodiles, turtles, early mammals, and towering forests surrounding ancient freshwater lakes.
Specimen Details
✓ Species: Plecia pealei (Marsh Fly)
✓ Age: Eocene (~51 million years old)
✓ Formation: Green River Formation
✓ Location: Kemmerer, Wyoming, USA
✓ Specimen Size: Approximately 48 × 51 × 11 mm
✓ Fly Size: Approximately 13 × 10 mm
✓ Weight: 39 g
✓ Authenticity: 100% Authentic natural fossil
✓ Display: Excellent collector, educational, or gift specimen
This authentic fossil was discovered in the renowned Green River Formation near Kemmerer, Wyoming—one of the world's most celebrated fossil localities. During the Eocene, a network of tranquil freshwater lakes covered this region. Fine layers of sediment settled to the lake floor year after year, gently burying insects, fish, plants, and other organisms before scavengers or decay could destroy them. Over millions of years, these sediments hardened into limestone, preserving extraordinary details and creating one of the finest fossil records on Earth.
Today, the Green River Formation is famous for its exceptionally preserved fossils and offers scientists an unparalleled window into an ancient ecosystem that flourished after the extinction of the dinosaurs. While fossil fish are the most recognizable finds from this formation, beautifully preserved insect fossils such as Plecia pealei are much less common and provide valuable insights into the rich diversity of prehistoric life.
The remarkable preservation of this Marsh Fly allows you to appreciate an insect that once buzzed through subtropical forests over 50 million years ago. Whether you're an experienced fossil collector, an educator, or simply fascinated by Earth's natural history, this authentic Green River fossil is a captivating reminder of life's incredible journey through deep time.
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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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