Lambeosaurus Rib Bone Cross Section- Judith River Formation | River Walker Minerals

Locale: Judith River Formation, Montana, USA 🇺🇸 
Age: Late Cretaceous (~75 million years old)
Dimensions: 45g | 2 x 1.2 x 0.7 inches

This specimen is a section of rib bone attributed to the Lambeosaurus, a duck-billed dinosaur that lived during the Late Cretaceous. The cut surface beautifully reveals the internal structure of the bone, showing the natural network of chambers and trabeculae that once helped support these massive animals while keeping their skeletons relatively lightweight.

Lambeosaurus belonged to the hadrosaur family, a group of highly successful herbivorous dinosaurs known for their elaborate hollow head crests. These crests may have been used for communication, species recognition, and even producing sounds. Growing up to 30 feet in length, Lambeosaurus would have lived alongside horned dinosaurs, tyrannosaurs, crocodilians, and countless other animals that inhabited the lush floodplains of what is now Montana.

The Judith River Formation is one of North America’s most important fossil-bearing deposits and preserves a fascinating snapshot of life roughly 75 million years ago. Bone sections such as this provide a rare opportunity to examine the remarkable internal architecture that allowed dinosaurs to achieve such impressive sizes.

With both the weathered outer cortex and exposed interior visible, this piece offers an interesting cross-section of prehistoric anatomy and makes a unique addition to any dinosaur or natural history collection.

Please review all photos and videos carefully. You will receive this exact piece.