Description
This listing offers a truly exceptional and rare giant ammonite fossil, TROPAEUM SUBARCTICUM M, measuring an impressive 15 inches in diameter. This Cretaceous-era specimen dates back to the Aptian stage (~120 million years ago) and was discovered in Maidstone, United Kingdom. Large, well-preserved ammonites from this formation are incredibly rare, making this an outstanding find for serious collectors
Fossil Information:
- Species: TROPAEUM SUBARCTICUM M (Extinct Ammonite)
- Geological Period: Early Cretaceous (Aptian, ~120 million years ago)
- Formation: Aptian Deposits
- Location: Maidstone, United Kingdom
- Size: 15 inches (38 cm) in diameter
- Preservation: Excellent – retains intricate shell structure and natural features
Key Features:
✔ A rare and giant ammonite fossil – an impressive display piece
✔ Exceptional preservation, showcasing intricate growth lines and suture patterns
✔ Highly sought-after specimen from the Aptian stage of the Cretaceous period
✔ Discovered in Maidstone, a well-known UK fossil locality
✔ Comes with a Certificate of Authenticity
Scientific & Historical Significance:
Ammonites like Tropeum subarcticum were prehistoric marine mollusks that thrived in ancient seas during the Early Cretaceous period. Their distinctive, coiled shells served as protective armor and enabled buoyancy, making them highly successful marine predators.
The Aptian deposits of Maidstone have yielded some of the finest ammonite fossils in the UK, known for their size, preservation, and historical importance. Large specimens like this are particularly valuable as they provide insight into the evolution and diversity of ammonite species during the Cretaceous period.
Authenticity & Certification:
All of our fossils are 100% genuine specimens and come with a Certificate of Authenticity. The exact fossil in the listing photos is the one you will receive.
Why Buy From Us?
This specimen originates from the Alice Purnell Collection, one of the largest and most prestigious ammonite collections in the world. We specialize in museum-quality fossils, carefully prepared and sourced to ensure authenticity and scientific value.
This massive 15-inch Tropeum subarcticum ammonite fossil is a true collector’s item, ideal for display, research, or investment. A remarkable opportunity to own a significant piece of Earth’s ancient history!








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