# Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium

**Pachycephalosaurus** was a Late Cretaceous dinosaur whose skull dome of solid bone - up to 10 inches thick - is one of the most extraordinary anatomical structures in the dinosaur fossil record. This **authentic Pachycephalosaurus dome fossil** in the medium size is a larger fragment of a real skull dome recovered from the Hell Creek Formation of South Dakota, over 66 million years old. The medium fragment offers more surface area to appreciate the dense, fine-grained texture of this remarkable bone.

## **More of the Cretaceous Helmet - The Medium Dome Fragment**

The Pachycephalosaurus dome is among the densest bone structures of any dinosaur - a natural armor cap evolved for the forces of intraspecific combat. Healed fractures observed in some dome specimens are consistent with head-butting behavior, and the dome's morphology changed significantly during the animal's lifetime. This is not a cast. This is a genuine fossil, presented in a glass-topped riker display case with an informational card serving as the statement of authenticity.

## **The Authentic Pachycephalosaurus Dome Fossil - Medium Size**

Each specimen includes a Mini Museum certificate of authenticity and informational display card. Explore more in our [Prehistoric Collection](https://www.museumize.com/collections/era-prehistoric-art-collection) and our [Natural History Collection](https://www.museumize.com/collections/natural-history-collection).

### **Product Details**

-   **SKU:** 80-112-0241-201-40-M
-   **Size:** Medium
-   **Formation:** Hell Creek Formation, South Dakota
-   **Age:** Over 66 million years old
-   **Display:** Glass-topped riker display case
-   **Includes:** Statement of authenticity

## Details

- **Price:** 29.0 USD - 49.0 USD
- **Vendor:** Mini Museum
- **Type:** Rocks & Fossils
- **Tags:** authentic-fossil-specimens, Mini Museum, rocks-fossils, Shopify Collective

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Small | 29.00 USD | In stock |
| Medium | 49.00 USD | In stock |

## Images

- Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium
- Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium
- Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium
- Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium
- Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium
- Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium
- Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium
- Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium
- Pachycephalosaurus Dome Fragment - Authentic Hell Creek Fossil Specimen - Medium

---

> Source: [Museumize.com](https://www.museumize.com/products/pachycephalosaurus-dome-fragment)
> Updated: 2026-06-25