Representative ImageDinosaur Fossils
·Real Fossil
Dinosaur Bone Fragment
- Real Fossil
- 75-80 million years
- Ships worldwide
£7.50
● In stock — dispatched within 2 working days
An authentic dinosaur bone fragment from the Late Cretaceous Judith River Formation of Montana. A remarkable piece of natural history. Specimens can range in sized from 0.5-2cm deep, 1-3cm wide, and 2-6cm long.
Gift Suitable
Comes in a display box, perfect for young collectors.
Specimen Record
DTF-4E9C3383Representative image
Photographs show a typical example. Your item will be similar but not identical.
- Species
- Indeterminate Dinosauria
- Identification confidence
- Not recorded
- Age
- 75-80 million years
- Geological period
- Late Cretaceous
- Formation
- Judith River Formation
- Locality
- Montana, USA
- Dimensions
- Not recorded
- Weight
- Not recorded
Condition & Treatment
- Repair
- Not recorded
- Restoration
- Not recorded
- Stabilisation
- Not recorded
- Polishing
- Not recorded
- Composite
- Not recorded
"Not recorded" means we hold no verified record for that detail — it is not a claim either way.
Curator Note
The Judith River Formation is world-renowned for its proximity to iconic species such as Tyrannosaurus rex and various Ceratopsids. While these fragments are unidentified by species, their provenance within these historic beds makes them a significant addition to any palaeontological collection.
At a Glance
Type
Genuine fossil
Display
Excellent for small display cases or handled study; looks best in a glass-topped collector's box.
Gift suitable
Yes
About This Fossil
This genuine dinosaur bone fragment offers a tangible connection to the Late Cretaceous period. Originating from the Judith River Formation, these specimens represent the remains of the diverse megafauna that once roamed the ancient floodplains of North America. Each piece displays the distinct trabecular—or 'honeycomb'—structure of fossilised bone, where the original organic cellular architecture has been meticulously replaced by minerals over tens of millions of years.
While these fragments are often referred to as 'chunk-o-saurus' by palaeontologists, they are far more than mere debris; they are the mineralised echoes of a lost world. The rich mineral content of the Montana soil has imbued these pieces with deep earthy tones, ranging from chocolate browns to charcoal greys, making each fragment a unique geological sculpture in its own right.
Formation & Preservation
The Judith River Formation is a terrestrial deposit characterised by its rich siltstone and sandstone layers, formed by ancient river systems. These bones were preserved when carcasses were swiftly buried by sediment during flood events, preventing scavenging and allowing for the slow process of permineralisation to occur within the oxygen-free environments of the riverbeds.
What Makes This Specimen Special
The Judith River Formation is world-renowned for its proximity to iconic species such as Tyrannosaurus rex and various Ceratopsids. While these fragments are unidentified by species, their provenance within these historic beds makes them a significant addition to any palaeontological collection.
Authenticity & Sourcing
Real vs Replica
- This is a genuine fossil — not a replica unless clearly stated. Clearly described and honestly presented.
- You will receive a specimen similar to the one shown — see Natural Variation below.
Ethical Sourcing
- Sourced from established suppliers and known commercial sites. We do not buy from localities we know to be protected, scientifically restricted, or subject to export controls. Origin and sourcing information is shared where known.
- ✓We will not knowingly handle specimens removed in breach of any country's heritage or export laws.
Origin & Natural Variation
Stated origin (Montana, USA) and formation (Judith River Formation) are based on supplier information and available geological references. Identification can vary in certainty — especially for fragments — so where exact locality cannot be independently verified, we describe the formation rather than a single quarry.
Fossils are natural objects. Expect minor variation in colour, surface texture, and matrix, mineralisation and surface detail. Treatment information is shown under Condition & Treatment where it is recorded. “Not recorded” means we hold no verified record for that detail; it is not a claim that no treatment occurred.
Read our full authenticity & honest descriptions policy or the authenticity & sourcing clause in our terms.
Shipping, Returns & Packaging
• UK shipping: Free on orders of £50 or more. Standard £4.95 (Royal Mail Tracked 48, typically 2–3 working days after dispatch).
• International: Available worldwide. Rates at checkout.
• Packaging: Individually wrapped, cushioned, and boxed. Fragile specimens receive extra protection.
• Dispatch: Within 2 working days (framed, mounted, or made-to-order pieces take 1 additional working day).
• Returns: 30-day returns. Contact us first. Item must be in original condition.